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Physiology Exam 2022 - Cycle 2

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Medicine Quiz on Physiology Exam 2022 - Cycle 2, created by Soheila Amri on 09/06/2022.
Soheila Amri
Quiz by Soheila Amri, updated more than 1 year ago
Soheila Amri
Created by Soheila Amri over 2 years ago
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Resource summary

Question 1

Question
Which of the following sentences describe property of fasciculus gracilis ?
Answer
  • It collects sensory input from lower part of the body
  • Collects sensory input from upper part of the body
  • It conducts impulses collected from muscle spindles and golgi tendon organs
  • It conveys touch and vibration sense
  • Second order neuron is located in medulla oblongata
  • Second order neuron is located in posterior horn of spinal cord

Question 2

Question
Which features are unique for unitary SMC?
Answer
  • They have BER (slow wave rhythm)
  • They have a plateau phase
  • They need action potential to initiate electrical activity
  • They are innervated by many nerve strands
  • They have gap junctions

Question 3

Question
What creates fEPSP in postganglionic sympathetic neurons ?
Answer
  • ACh through N-cholinergic receptors
  • ACh through M-cholinergic receptor
  • Gn-RH
  • D2-Receptor

Question 4

Question
What is true about nerve fibers of the efferent ANS?
Answer
  • Preganglinic sympathetic axons are myelinated A fibers
  • Postganglionic parasympathetic axons are unmyelinated C-fiber
  • Preganglionic sympathetic axons are myelinated B-fibers
  • Preganglionic parasympathetic axons are unmyelinated C-fibers

Question 5

Question
Specific, where ligand gated channels are found in the neuron;
Answer
  • Dendrites
  • Cell body = soma
  • Axon hillock
  • Nodes of ranvier

Question 6

Question
Identify features that separate CARDIAC from skeletal muscles
Answer
  • It is build of thick and thin filaments
  • Action potential has a plateau phase
  • Cells can depolarize independent of external impulses
  • Calcium ins are stored in the endoplasmic reticulum
  • Gap junctions

Question 7

Question
The Resting membrane potential of a cellular membrane is dependent on:
Answer
  • K+ outflow (leakage current)
  • Fast Na+ channels
  • Fast k+ channels
  • Ca2+ channel
  • Na+/K+ pump- ATPase

Question 8

Question
In Neuromuscular junctions you can find:
Answer
  • N-cholinergic receptor
  • Acetylcholine
  • Beta-Adrenergic receptor
  • Folds of the cardiac membrane

Question 9

Question
ATP function in cross bridge cycle: In the cross bridge cycle of skeletal and cardiac muscle, ATP produces:
Answer
  • Tropomyosin and actin connection
  • Ca2+ released from Sarcoplasmic reticulum
  • ATP - energizing the power stroke of the myosin cross bridge
  • ATP - disconnecting the myosin cross bridge from the binding site on actin at a conclusion of a powerstroke
  • ATP - actively transporting Ca2+ ions into the sarcoplasmic reticulum

Question 10

Question
GABA is
Answer
  • Voltage gated Cl- channel
  • Ligand gated Cl- channel
  • CL channel, gated with GABA
  • Activation/ release leads to IPSP

Question 11

Question
Co-transmitters and mediators in ANS:
Answer
  • Preganglionic cholinergic fibers
  • Postganglionic cholinergic fibers
  • Postganglionic adrenergic
  • Preganglionic adrenergic

Question 12

Question
Resting membrane potential in maintained by:
Answer
  • K+ ions outflow
  • Cl ion passage
  • NA/K pump
  • Protein anions
  • Na+ channels & currents does not influence resting membrane potential

Question 13

Question
Standard Action potential of the neuron:
Answer
  • Reflects all or none law
  • Involves sodium, chloride and calcium channels
  • Can be summated in time and space
  • The amount of liberated neurotransmitter is proportionate to the frequency of action potential passing via p...

Question 14

Question
Which of the following cells are able to create action potential?
Answer
  • Olfactory receptor cells
  • Hair cells of the organ of Corti
  • Ganglion cells of the retina
  • Bipolar cells of the retina

Question 15

Question
Tetanic contraction of the skeletal muscle results from the cumulative increase in the intracellular concentration of which of the following?
Answer
  • ATP
  • Potassium ion
  • Phosphocreatine
  • Calcium ion
  • Troponin

Question 16

Question
Tetany can be observed in:
Answer
  • Decrease in Ca2+ (low plasma level)
  • Decrease in Mg2+ (low plasma levels)
  • Increase in Ca2+
  • Increase in temperature
  • Decrease in H+
  • Increase in HCO3-, K+ and HPO42-
  • Acidosis
  • Alkalosis

Question 17

Question
Identify right features common for all types of striated muscle:
Answer
  • Calmodulin intensifies activity of the calcium pump of SR, pumping ions back into ECF
  • T-tubules of the sarcolemma is rich in ligand gated channels
  • DHP receptor is the voltage gated structure of sarcolemma
  • Rise of concentration of calcium ion in cytosol of striated muscle cells is the necessary condition for generation of cross bridges
  • RyR is the ionotropic receptor of sarcolemma

Question 18

Question
In synaptic transmission:
Answer
  • Acetylcholine is broken down by acetylcholine esterase in synaptic cleft. This finishes synaptic transmission
  • Postsynaptic inhibition depends on the number of IPSP and EPSP generated on particular postsynaptic membrane
  • Glycine produced EPSP in postsynaptic neuron

Question 19

Question
The site where the threshold potential (-55mV) has to occur in order to produce an action potential is:
Answer
  • Axon
  • Axon hillock
  • Soma
  • Dendrites

Question 20

Question
Choose which of the following statements are true (action potential):
Answer
  • The site where the threshold potential (-55mV) has to occur in order to produce an action potential is the axon hillock
  • During its resting state, the electrical charge inside the neuron is negative compared to the outside
  • In response to an action potential, a presynaptic neuron releases a chemical called a neurotransmitter which diffuses across the synaptic cleft to activate ligand receptor on the postsynaptic cell
  • The reason why there is a sudden shift in the electrical potential of the neuron (from about -70mv to about +50mv) during an action potential is largely due to the sudden influx of potassium ions.

Question 21

Question
Which of the followings are peptide hormones:
Answer
  • Thyroxine, aldosterone, growth hormone;
  • Insulin, epinephrine, dopamine;
  • Vasopressin, oxytocin, insulin;
  • Parathyroid hormone, growth hormone, calcitonin

Question 22

Question
In the neurons:
Answer
  • The axons convey impulse away from the cell body;
  • Neurotransmitters are synthesized in the cell bodies and then transported to the axons
  • The condition velocity decreases with fiber diameter
  • The excitability is increased if the extracellular calcium concentration is decreased

Question 23

Question
Fill the blank with the correct words:"During the neuron's resting state, large amounts of positive ______ ions are found in the extracellular fluid, whereas relatively more positive ______ ions are found inside the cell."
Answer
  • sodium, potassium
  • potassium, sodium
  • potassium, chloride
  • chloride, potassium

Question 24

Question
The conduction velocity of the nerve fibers is increased by:
Answer
  • Decreased temperature
  • Increased concentration of the external sodium ions
  • Increased axon diameter
  • Myelination

Question 25

Question
Place the following neurons in order of their speed of conduction , from faster to slowest: (they are in the correct order seen below a. myelinated axon, diameter 20um b. unmyelinated axon, diameter 200um c. unmyelinated axon, diameter 20um
Answer
  • b, c, a
  • c, a, b
  • a, b, c

Question 26

Question
The presence of myelin allows an axon to:
Answer
  • Produce more frequent action potentials
  • Conduct impulses more rapidly
  • Produce action potential of larger amplitude
  • Action potential of longer duration

Question 27

Question
Hair cells of semicircular canals:
Answer
  • Respond to linear acceleration
  • Discharge at rest
  • Depolarize when bend towards kinocilium
  • Saccule and Utricle
  • Signals linear acceleration

Question 28

Question
Hair cells are located:
Answer
  • In tympanic membrane
  • In inner ear
  • In semicircular canals
  • In scala tympani
  • middle ear
  • crista ampullaris
  • basilar membrane of organ of corti

Question 29

Question
Vestibular Nystagmus:
Answer
  • Triggered by linear acceleration
  • Toward warm ear in Barany test
  • Opposite of Barany rotation test
  • Defined by its slow phase
  • not envoked in normal healthy people
  • postrotatory side is in opposite direction
  • slow eye movement - vestibular occular reflex
  • slow eye movement - vertigo

Question 30

Question
True statement:
Answer
  • In damage to Wernick's area, person can talk fluently but poor auditory comprehension and poor repetition of heard and read words (cant name)
  • In damage to wernick's area, person can talk fluenty with good auditory comprehension, but is not able to repeat heard and read words
  • In damage to Broca's speech area, person can talk fluently, but poor auditory comprehension and able to repeat heard words
  • In damage to Broca's speech area, person can't talk fluently, but good auditory comprehension (can't name and repeat)

Question 31

Question
Organ of Corti:
Answer
  • Inner motile due to basilar membrane
  • Abundant efference
  • Abundant afferent

Question 32

Question
Primary somatosensory cortex: Primary sensory cortex
Answer
  • Receives somatosensory input (specific)
  • Located in precentral gyrus of frontal lobe
  • Is Brodmans area 1,2,3
  • Goes to cingulate gyrus

Question 33

Question
Defects of left geniculocalcarine tract (left optic radiation / optic tract):
Answer
  • Temporal half of left retina
  • Temporal half of right retina
  • Nasal half of left retina
  • Nasal half of right retina
  • Both halves of semis retina

Question 34

Question
Concerning stretch reflex:
Answer
  • Anulospiral endings continued by afferent myelinated Ib fibers.
  • Anulospiral endings continued by afferent myelinated Ia fibers
  • Efferent cdr fibers of anterior horn
  • Efferent A alfa fibers of anterior horn
  • Flower - spray endings continued by efferent myelinated group III fibers

Question 35

Question
What is correct regarding reflexes:
Answer
  • Stretch reflex is a monosynaptic
  • Stretch reflex is a polysynaptic
  • Inverse stretch reflex is a withdrawal reflex
  • Annulospiral and flower-spray in endings muscle spindle

Question 36

Question
Identify correct statements concerning delta waves:
Answer
  • Deepest part of NREM sleep
  • Lower muscle tone in skeletal muscle
  • More than 50% of normal EEG
  • Spindles of theta waves

Question 37

Question
Elements of the visual pathway: (6 correct)
Answer
  • medial geniculate body
  • lateral geniculate body
  • retina, small retina cells
  • optic disc and optic radiation
  • purkinje cells
  • bipolar cells, photosensitive cells and ganglion cells
  • optic chiasm
  • neurons of visual cortex

Question 38

Question
Neurons of visual pathway are (mind the order): (ONLY 5 are correct) a. Photosensitive cells b. Bipolar cells c. Ganglion cells d. Cells of lateral geniculate body of thalamus e. Neurons of visual cortex (bordmans area 17) f. Purkinje cells g. Cells of medial geniculate body of thalamus
Answer
  • a, b, c, f, g
  • a, b, c, d, e
  • a, c, f, b, g
  • a, b, f, d, e

Question 39

Question
Fast superficial pain:
Answer
  • Cerebral cortex
  • Transmitted by unmyelinated fibers
  • Bright and easy to localise
  • Transmitted by myelinated A fibers (delta)
  • Short lasting pain signals (sharp)

Question 40

Question
Pacinian corpuscle:
Answer
  • Rapidly adapting
  • Slow adapting
  • Large area of skin - large receptive field size
  • Small area of skin

Question 41

Question
Defects of cerebellum;
Answer
  • Ataxia, failure of progression
  • Poor coordination, decomposition of body movements
  • Intention tremor
  • Resting tremor
  • Adiadochonkinesia/ dysdiadochokinesia
  • cerebellar nystagmus (tremor of eyes)
  • past pointing, dysmetria & hypotonia
  • Synergia

Question 42

Question
Mechanoreceptor are located in:
Answer
  • Scala tympani
  • Scala media
  • scala vestibuli
  • golgi tendon organ
  • ampulae of semicircular canal

Question 43

Question
The reflex arc of the withdrawal reflex is composed of (5)
Answer
  • nociceptor
  • muscle spindle
  • Ia sensory fibers
  • Ib sensory fibers
  • A delta fiber
  • excitatory interneurons
  • inhibitory interneurons
  • alpha motor neurons

Question 44

Question
Fovea centralis (4)
Answer
  • Located medially to optic disc
  • Located superior to optic disc
  • Located laterally to optic disc (temporal)
  • Located inferior to optic disc
  • Is located in center of macula lutea of retina
  • Is closely packed with cones
  • Greatest visual acuity (central vision)

Question 45

Question
Cholinergic neurons of autonomic nervous system (Ach)
Answer
  • postganglionic parasympathetic
  • preganglionic Parasympathetic
  • postganglionic sympathetic
  • preganglionic sympathetic
  • Alpha motor

Question 46

Question
Tapping of the patellar elicits a reflex contraction of the quadriceps muscle, Which of the following proceeds the contraction of the quadriceps femoris?
Answer
  • The Ia afferents from the quadriceps muscle spindle increase their rate of firing
  • The Ib afferents from the Golgi tendon organ increase their rate of firing
  • The alpha-motoneurons innervating the extradural muscle fibers increase their rate of firing
  • The gamma-motoneurons innervating the intrafusal muscle increase their rate of firing
  • The alpha-motoneurons to the antagonist muscles increase their rate of firing

Question 47

Question
Which of the following are elements of the reflec arc of the inverse stretch reflex?
Answer
  • Inhibitory interneuron of the spinal cord
  • Gamma motor neuron innervating extratusal skeletal muscle cells
  • Golgi tendon organ
  • Ib sensory fiber from the annulospinal ending
  • Alpha-motor neuron innervating extrafusal skeletal muscle cells
  • C fiber collecting input from the muscle spindle
  • Sensory protoneuron of the dorsal root ganglion collecting input from type la sensory fiber

Question 48

Question
Identify the FIRST and the LAST stage of the phototransduction of rods right after absorption of light:
Answer
  • Hyperpolarization and photoreceptor
  • Activation of transduction
  • Increase of the concentration of cGMP
  • Changing of the retinal configuration from the cis-form to the more energetic trans-form
  • Closure of the cGMP dependent Na+ channel
  • Reduction of the concentration of cGMP

Question 49

Question
Find right statement concerning audition:
Answer
  • Frequency of vibration of the basilar membrane differs frequency of vibration of the ear drum
  • The apical part of the basilar membrane resonate the most in response to the tone of 200Hz
  • Outer hair cells of the cochlea help to discriminate loudness of the sound
  • Inner hair cells of the cochlea function as detectors of the tone pitch
  • Tone of 20kHz produces vibration of the entire basilar membrane

Question 50

Question
Identify right statements concerning olfactory transduction (mind the proper order of events) that develops right after odorant:
Answer
  • Activation of G-protein complex (Golf)
  • Activation of the adenyl cyclase and synthesis of cAMP
  • Ca2+ opens Cl-outward channels that produce depolarization that reaches axon hillock
  • Generation of the action potential in cilia of the olfactory cells

Question 51

Question
Symptoms of cerebellar defects might be: 1. Resting tremor. 2. Ataxia, dyscoordination of voluntary and involuntary movements. 3. Flaccid paralysis. 4. Spasticity and exaggerated stretch reflexes. 5. Broad-based gait and intention tremor. 6. Atrophy of muscles. 7. Dyscoordination of only involuntary movements.
Answer
  • 1, 2, 4
  • 2, 5
  • 4, 5, 7
  • 3, 6

Question 52

Question
Which of following cells are cholinergic neurons of the Autonomic Nervous System (liberate Ach): 1. Preganglionic parasympathetic neurons. 2. Postganglionic parasympathetic neurons. 3. Preganglionic sympathetic neurons. 4. Postganglionic sympathetic neurons to gastric glands. 5. Alpha-motor neurons of the anterior horns.
Answer
  • 1, 2, 3, 4
  • 2, 3, 4, 5
  • 1, 2, 3
  • 1, 2, 3, 5

Question 53

Question
Parasympathetic system: 1. Produces contraction of the gallbladder 2. Increases velocity of conduction in the atrin of the atrioventricular node of the intrinsic conduction system of heart. 3. Produces contraction of detrusor muscle of the urinary bladder. 4. Produces dilation of airways (bronchodilation).
Answer
  • 2, 4
  • 1, 3
  • 1, 4
  • 2, 3

Question 54

Question
Anterior (ventral) spinothalamic tract is composed of (PROPER ORDER of NEURONS is required): 1. Neurons in posterior horn of the spinal cord. 2. Dorsal root ganglion cell. 3. Neurons in nucleus gracilis. 4. Neurons in ventral posterolateral nuclei of the thalamus. 5. Neurons in postcentral gyrus of the cerebral cortex.
Answer
  • 2, 3, 4, 5
  • 2, 1, 3, 4, 5
  • 1, 2, 4, 5
  • 2, 1, 4, 5

Question 55

Question
Which of following phenomena are mediated by alpha-adrenergic receptor: 1. Intestinal relaxation. 2. Urinary bladder sphincter contraction. 3. Lipogenesis. 4. Bronchodilation.
Answer
  • 2, 4
  • 1, 3
  • 3, 4
  • 1, 2

Question 56

Question
Identify all true statements concerning threshold potential
Answer
  • Threshold potential equals -40mV in standard neurons.
  • Threshold potential is the minimum amplitude of the stimulus which is able to elicit action potential.
  • The lower the threshold potential, the higher cell excitability.
  • Threshold potential is the membrane charge able to open voltage gated channels initiating spontaneous distribution of excitation.

Question 57

Question
Identify right statements concerning phenomena that begin depolarization of the skeletal muscle cell:
Answer
  • Activation of nicotinic receptor of the skeletal muscle cell generates action potential of the motor end plate.
  • Binding of Ach to the nicotinic receptor produces end plate potential.
  • End plate potential of the sarcolemma of the skeletal muscle cell is produced by the ligand gated channel.
  • Activation of the muscarinic M1 receptor produces IPSP of the motor end-plate.

Question 58

Question
Rhodopsin is..;
Answer
  • The G-protein that breaks down cGMP.
  • Extremely sensitive to light. It begins phototransduction being entered by a single photon of light.
  • A metabotropic G-protein coupled receptor.
  • The ionotropic receptor gated by GABA (GABAC receptor)
  • Embedded in the membrane of free floating discs of the outer segment of the rod cell.

Question 59

Question
How far from the lens is the focal point of the eye, which refractive power is 50 dioptres?
Answer
  • 50 mm beyond the lens.
  • 25 mm beyond the lens and it is always located on the fovea
  • 2 cm beyond the lens.
  • 50 mm in front of the lens

Question 60

Question
Sentences related to afferent (ascending) pathways of the spinal cord:
Answer
  • All spinal pathways to cerebral cortex pass through transitional nuclei of thalamus.
  • They conduct exteroceptive, proprioceptive and auditory sensation.
  • Unconscious proprioceptive sensation terminates with mossy fibers on granule cells of cerebellar cortex.
  • Their second neurons can be located in spinal cord or medulla oblongata.

Question 61

Question
Purkinje cells of the cerebellar cortex:
Answer
  • Are excited by climbing fibers from the olivary nuclei
  • Collect efferent output from deep cerebellar nuclei.
  • Are located in molecular layer of the cerebellar cortex
  • Release GABA from their axon terminals. They produce inhibitory effect to deep cerebellar nuclei.

Question 62

Question
Nociception is conducted by:
Answer
  • Lateral spinothalmic tract
  • The same pathway as the vibration and fine, precise touch
  • The same pathway as the input from thermoreceptors
  • Pathways of concious and unconscious proprioception

Question 63

Question
Gamma-motor neurons:
Answer
  • They terminate in form of flower spray endings in peripheral part of the muscle spindle
  • Their bodies are located in intermediolateral part of the grey matter of the spinal cord (lateral horn).
  • They terminate in form of plate and trail endings on the nuclear bag and the nuclear chain fibres of muscle spindles.
  • They are lower motor neurons of the reticulospinal tract.

Question 64

Question
Sensory input to the postcentral gyrus of the parietal lobe originates from:
Answer
  • Mechanoreceptors of the vestibular organ.
  • Mechanoreceptors of the organ of Corti.
  • Annulospiral endings and flower spray ending of muscle spindles and Golgi tendon organs
  • Nociceptors of the slow pain pathways.

Question 65

Question
Excitation-contraction coupling in SMOOTH muscle cells involves following events EXCEPT for:
Answer
  • Inward calcium current via the ryanodine receptor of the cellular membrane.
  • Activation of the IP3 receptor of the sarcoplasmic reticulum.
  • Shortening of sarcomere
  • Formation of calcium-calmodulin complex.

Question 66

Question
Which statements concerning audition are right?
Answer
  • Conduction deafness develops in effect of damage of the cochlea of the inner ear.
  • In conduction deafness, bone conduction of sound is better/longer than air conduction in Rinne test.
  • In Schwabach test, bone conduction of sound of the healthy examiner is better than bone conduction of the patient suffering from sensorineural loss of hearing.
  • In Weber test, sound lateralizes (is heard louder) toward defected ear in conduction deafness.

Question 67

Question
Lidocaine, commonly used agent for local anesthesia, blocks action of the fast voltage-gated sodium channel. Identify effects you expect:
Answer
  • It produces postsynaptic inhibition decreasing neural excitability.
  • It produces presynaptic inhibition within neural axons decreasing their threshold of excitability.
  • It increases the amount of GABA – spinal neurotransmitter producing IPSP
  • It has no effect on the threshold of excitability of neurons.
  • It creates anesthetic effect by interrupting of propagation of the exteroception, including pain, via nerves.

Question 68

Question
Which of following are elements of the reflex arc of the inverse-stretch reflex?
Answer
  • Alpha-motor neuron projecting its axon to skeletal muscle cells.
  • Excitatory interneuron of the spinal cord.
  • The muscle spindle aligned parallel to extrafusal muscle fibers.
  • Alpha-motor neuron projecting its axon to the flexor muscles of the ipsilateral limb.
  • Golgi tendon organ.
  • Sensory protoneuron of the dorsal root ganglion collecting input from A delta fiber.
  • Sensory protoneuron of the dorsal root ganglion collecting input from A alpha sensory fiber.

Question 69

Question
In myopia
Answer
  • Far point of vision can be located even 1 meter from the eye.
  • It is related to increased focal length of the eyeball.
  • It is related to decreased focal length of the eyeball.
  • Far objects are focused on retina while near objects behind the retina.
  • Near objects are focused on retina while far objects in front of the retina.

Question 70

Question
Identify right statements concerning SLOW PAIN:
Answer
  • It is modulated by inhibitory interneurons of substantia gelatinosa of the dorsal horn.
  • It is transmitted by unmyelinated C-fibers.
  • It is conducted via midline and intralaminar nuclei of the thalamus to the cingulate gyrus of the cortex.
  • It is not transmitted to the cerebral cortex, it reaches only limbic system and hypothalamus.
  • It is “bright”, easily localized pain, transmitted by Ad-fibers (A delta).
  • It is intensified by neurons of substantia gelatinosa (SG).

Question 71

Question
Left optic tract aggregates axons of ganglion cells from:
Answer
  • Temporal half of the left retina.
  • Temporal half of the right retina.
  • Nasal half of the left retina.
  • Nasal half of the right retina.
  • Both right hemiretinas (right halves of both retinas)

Question 72

Question
Which of following statements properly concern inhibitory interneurons of the spinal cord:
Answer
  • Renshaw cells receive the output from alpha motor neurons and perform their recurrent inhibition.
  • Inhibitory interneurons are involved in eliciting myotatic reflexes.
  • In effect of reciprocal innervation, inhibitory interneurons bring relaxation of extensor muscles in withdrawal reflex.
  • Inhibitory interneurons of the cord are mostly GABAergic, mediating IPSP and cellular hyperpolarization via GABAA receptor.

Question 73

Question
​Purkinje​ cells in Basal Ganglia of cerebellar cortex ?
Answer
  • Receive efferent fibers from deep cerebellar cortex
  • Exited by climbing fibers
  • Inhibited by mossy fibers
  • Connected with caudate nucleus

Question 74

Question
What is true?
Answer
  • Granule cells strongly excites purkinje cells
  • Climbing cells are from inferior olivary nucleus
  • Climbing cells can excite mossy fibers
  • Granule cells are part of cerebellum

Question 75

Question
True about ​gamma​ motor neurons:
Answer
  • They maintain activity of Ia afferent
  • They detect the length of extrafusal muscle fibres
  • They produce contraction of nuclear bag and chain fibres
  • They stimulate the activity of Ib fibres

Question 76

Question
Location of ​cholinergic​ receptors:
Answer
  • Endocrine cells of medulla of adrenal gland
  • Sarcolemma of smooth muscle cells of urinary bladder
  • Sarcolemma of skeletal muscle cells
  • Sarcolemma of smooth muscle cells of systemic veins -

Question 77

Question
What statement is ​right​ concerning ​beta​ rhythm:
Answer
  • Appears when patients eyes are open
  • Low frequencies high amplitude in NREM sleep
  • Forms sleep spindles in EEG
  • Appears over occipital lobes when eyes are closed
  • Measured mostly on frontal lobe for conscious thought

Question 78

Question
Dark adaptation of the eye:
Answer
  • Degeneration of rhodopsin
  • Regeneration of light sensitive of rhodopsin
  • Constriction of pupil
  • Dilation of pupil
  • Increased sensitivity of retina for light

Question 79

Question
Right statements concerning visual acuity:
Answer
  • In the top row of the Snellen chart letters are separated by 1 arc. It can be read from 50m away
  • It is the nearest point to the eye at which an object can be brought into clear focus by accommodation
  • Is related to the smallest angle by which two points can be separated and still perceived as two points.
  • Is determined by ophthalmoscope
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