Cada pregunta de este test está cronometrada.
A 4-7 HZ rhythm normally occurs in:
Hypothalamus
Hippocampus
Parito-occipital area
Frontal area
all are true about RAS EXCEPT:
I essential for initiation & maintainence of consciousness
Is a complex polysynaptic system which extends from the brain stem to the spinal cord
Receives impulses from ascending sensory tracts
sends impulses to Non specific thalamic nuclei from which impulses are projected diffusely to all parts of the Cortex
Pleasure centers & punishment centers are located in :
Mammillary bodies
Limbic system
Precentral gyrus
Prefrontal gyrus
Hypothalamus protects the body against hypolycemia by:
Decrease insulin release
Increase glucagon release
Increase sympathetic activity & epinephrine release
Increase thyroxine release
what is true about memory :
Implict memory is the unconscious recall of information
Explicit memory is stored in basal ganglia and cerebellum
Sensory memory is the long term recall of information
Short term memory is due to protein synthesis
The normal range of IOP is:
5-20 mmHg
10-24 mmHg
15-30 mmHg
20-40 mmHg
Lens has high RI due to :
Highly curved posterior surface
It's transparency
High protein concentration in lens
It's avascular
Center of accommodation reflex is:
Edinger westiphal nucleus
Pretectal area of midbrain
Lateral Geniculate body
Superior colliculus
All the following causes Myopia EXCEPT:
Aphakia
Keratonous
Spasm of ciliary muscles
Lens dislocation
Pilocarpine causes miosis by:
Stimulates muscarinic receptors
Inhibits cholinesterase enzyme
Stimulates Edinger westiphal nucleus
None of above
What part of retina contains only cones and is the area of greatest visual acuity :
Ciliary body
Ora serrata
Fovea centralis
Optic disk
The round window is connected directly to which:
Scala tympani
External auditory meatus
Cochlear duct
Scala vestibuli
Which of the following is not a character of tympanic membrane:
Resonator
Amplifies sound vibration
Aperiodic
Damped
In middle ear:
Air limits the movement of the bony ossicles
Organ of corti overlies the basilar membrane
It is filled with endolymph
Air equalizes the pressure on the sides of the drum
Regarding olfaction :
Olfactory receptors are slowly adapting
The only sensation in the body not perceived in thalamus
Olfactory receptors are widely distributed in the nasal cavity
Olfactory receptors respond to stimulation is hyperpolarized
The lowest rate of plasma clearence is :
Creatinine
Glucose
Urea
Inulin
The glomerular filtration:
PH is not similar to plasma
Osmolality about 100
Its specific gravity is less than specific gravity of plasma
Is totally free from Protien
What is the primary disturbance seen in metabolic acidosis:
Increased Na
Increased K
Decreased HCo3
External sphincter opened during micturition by:
Hypogastric n. , excitation
Sacral parasympathetic n. , excitation
Pudendal n. , inhibition
Pudendal n. Excitation
The greater percentage of Na reabsorption in:
PCT
DCT
CT
Loop of henle
