Elle Ashe
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1 PA School Quiz on Cadiac Physiology Multiple Choice Questions, created by Elle Ashe on 12/02/2017.

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Elle Ashe
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Cadiac Physiology Multiple Choice Questions

Question 1 of 36

1

This phase of the cardiac cycle produces the S2 sound.

Select one of the following:

  • Rapid ejection

  • Reduced ejection

  • Isovolumetric relaxation

  • Rapid ventricular filling

  • Reduced ventricular filling

Explanation

Question 2 of 36

1

Which center of the brain is responsible for modulating the cardiac pacemaker and renal vasodilation?

Select one of the following:

  • Hypothalamus

  • Posterior pituitary

  • Medulla

  • Pons

Explanation

Question 3 of 36

1

An increase in which of the following values will make blood LESS turbulent?

Select one of the following:

  • Density of blood

  • Diameter of vessel

  • Velocity of blood

  • Viscosity of blood

Explanation

Question 4 of 36

1

Which of the following ions is responsible for the rapid depolarizing phase of the action potential in the SA node and AV node?

Select one of the following:

  • Na+

  • K+

  • Ca++

  • Cl-

Explanation

Question 5 of 36

1

Which of the following would result in vascular smooth muscle contraction?

Select one of the following:

  • Decreased [Ca++]

  • Increased [cAMP]

  • Increased [cGMP]

  • Endothelin

Explanation

Question 6 of 36

1

Which of the following muscarinic receptor subtypes is located in the heart?

Select one of the following:

  • M1

  • M2

  • M3

  • M4

  • M5

Explanation

Question 7 of 36

1

This phase of the cardiac cycle is when the S1 sound is heard.

Select one of the following:

  • Isovolumetric ventricular contraction

  • Rapid ejection

  • Reduced ejection

  • Isovolumetric relaxation

  • Rapid ventricular filling

  • Reduced ventricular filling

Explanation

Question 8 of 36

1

The sympathetic anatomic pathway causes a tachycardic effector response via norepinephrine binding to which receptor?

Select one of the following:

  • alpha1

  • alpha2

  • beta1

  • beta2

Explanation

Question 9 of 36

1

Which of the following as the greatest affinity for alpha 1 receptors?

Select one of the following:

  • Acetylcholine

  • Norepinephrine

  • Epinephrine

  • Isoproterenol

Explanation

Question 10 of 36

1

Which of the following has the largest internal radius?

Select one of the following:

  • Vena cava

  • Aorta

  • Small arteries

  • Arterioles

  • Capillaries

Explanation

Question 11 of 36

1

Which of the following statements concerning the sympathetic nervous system is TRUE?

Select one of the following:

  • Most preganglionic sympathetic axons are unmyelinated

  • The chain of sympathetic ganglia extends from the upper neck (C2-3) to the coccyx

  • The postganglionic axons rejoin the spinal nerves via the white rami communicantes

  • Sympathetic preganglionic axons release acetylcholine to activate muscarinic receptors.

  • Preganglionic sympathetic cell bodies are located within the ventral horn

Explanation

Question 12 of 36

1

Which adrenergic receptor is commonly found in the heart, salivary glands, adipose tissue and kidney?

Select one of the following:

  • alpha1

  • alpha2

  • beta1

  • beta2

Explanation

Question 13 of 36

1

S4 corresponds to?

Select one of the following:

  • Closure of mitral and tricuspid valves

  • Closure of aortic and pulmonary valves

  • Opening of stenotic mitral valve

  • Diastolic filling gallop or ventricular or protodiastolic gallup

  • Atrial sound that creates an atrial or presystolic gallup

Explanation

Question 14 of 36

1

Which of the following would you expect if the diameter of vessel was decreased?

Select one of the following:

  • No significant change to flow

  • Increased laminar flow

  • Decreased turbulent flow

  • Increased Reynolds number

Explanation

Question 15 of 36

1

All preganglionic neurons whether sympathetic or parasympathetic release acetylcholine to stimulate which type of receptor?

Select one of the following:

  • M1 type muscarinic receptors

  • M2 type muscarinic receptors

  • M3 type muscarinic receptors

  • N1 type nicotinic receptors

  • N2 type nicotinic receptors

Explanation

Question 16 of 36

1

Preganglionic parasympathetic fibers originating in S2-S4 exit the spinal cord through the which region?

Select one of the following:

  • Dorsal roots

  • Ventral roots

  • Intermediolateral column

  • Medial column

Explanation

Question 17 of 36

1

Which of the following is not a sensory input of the autonomic nervous system?

Select one of the following:

  • Mechanoreceptors

  • Chemoreceptors

  • Golgi tendon organs

  • Nociceptors

Explanation

Question 18 of 36

1

Vasoconstriction in most blood vessels such as skin is produced from norepinephrine binding to which receptor?

Select one of the following:

  • alpha1

  • Alpha2

  • beta1

  • beta2

Explanation

Question 19 of 36

1

Where is the highest resistance to blood flow found?

Select one of the following:

  • Arteries

  • Arterioles

  • Capillaries

  • Venules

  • Veins

Explanation

Question 20 of 36

1

Where is the Na+ current not found?

Select one of the following:

  • SA node

  • Purkinje fibers

  • Atrial muscle

  • Ventricular muscle

Explanation

Question 21 of 36

1

The vagus nerve is the name for which cranial nerve?

Select one of the following:

  • III

  • VII

  • IX

  • X

  • XI

Explanation

Question 22 of 36

1

Which of the following has the greatest affinity for beta 1 and beta 2 receptors?

Select one of the following:

  • Isoprotenerol

  • Epinephrine

  • Norepinephrine

  • Acetylcholine

Explanation

Question 23 of 36

1

S3 corresponds to?

Select one of the following:

  • Closure of mitral and tricuspid valves

  • Closure of aortic and pulmonary valves

  • Opening of a stenotic mitral valve

  • Diastolic filling gallup or ventricular or Ignore gallop

  • Atrial sound that creates and atrial or presystolic gallop

Explanation

Question 24 of 36

1

Which of the following has the smallest aggregate cross-sectional area.

Select one of the following:

  • Vena cava

  • Aorta

  • Small arteries

  • Arterioles

  • Capillaries

Explanation

Question 25 of 36

1

What adrenergic receptor would you expect to find on arterioles that when activated cause constriction of smooth muscle reducing the vessel diameter?

Select one of the following:

  • Alpha1

  • Alpha2

  • Beta1

  • Beta2

Explanation

Question 26 of 36

1

What is the largest current in the heart?

Select one of the following:

  • Na+

  • Ca++

  • K+

  • Cl-

Explanation

Question 27 of 36

1

Which of the following cranial nerves is not a component of the parasympathetic nervous system?

Select one of the following:

  • III

  • VII

  • IX

  • X

  • Xi

Explanation

Question 28 of 36

1

Which of the following receptor types are inotropic?

Select one of the following:

  • Nicotinic

  • Muscarinic

  • Adrenergic

Explanation

Question 29 of 36

1

Mean linear velocity is greatest in which of the following types of vessels?

Select one of the following:

  • Vena cava

  • Aorta

  • Small arteries

  • Arterioles

  • Capillaries

Explanation

Question 30 of 36

1

The mechanism of action for this receptor involves inhibiting adenylyl cyclase , decreasing cAMP.

Select one of the following:

  • Alpha1

  • Alpha2

  • beta1

  • Beta2

Explanation

Question 31 of 36

1

Which of the following is innervated by the parasympathetic nervous system?

Select one of the following:

  • Erectile tissue

  • Sweat glands

  • All skeletal blood vessels

  • Adrenal gland

Explanation

Question 32 of 36

1

An opening snap corresponds to.

Select one of the following:

  • Closure of aortic and pulmonary valves

  • Closure of mitral and tricuspid valves

  • Opening of a stenotic mitral valve

  • Diastolic filling gallop or ventriculoar protosystodiastolic gallop

Explanation

Question 33 of 36

1

Which of the following organs are innervated by the sympathetic chain ganglion instead of a pre-vetebral plexus ganglion?

Select one of the following:

  • Gallbladder

  • Liver

  • Large intestine

  • Heart

  • Bladder

Explanation

Question 34 of 36

1

In the circulatory system, where is the greatest decrease in pressure found?

Select one of the following:

  • Capillaries

  • Arterioles

  • Venules

  • Arteries

  • Veins

Explanation

Question 35 of 36

1

Which of the following is responsible for the rapid depolarizing phase of the action potential in the atrial and ventricular muscle and in Purkinje fibers?

Select one of the following:

  • Na+

  • K+

  • Ca++

  • Cl-

Explanation

Question 36 of 36

1

Which of the following receptors involves IP3 increasing intracellular Ca++?

Select one of the following:

  • Alpha1

  • Alpha2

  • Beta1

  • Beta2

Explanation

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