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Cadiac Physiology Multiple Choice Questions

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1 PA School Quiz on Cadiac Physiology Multiple Choice Questions, created by Elle Ashe on 12/02/2017.
Elle Ashe
Quiz by Elle Ashe, updated more than 1 year ago
Elle Ashe
Created by Elle Ashe about 7 years ago
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Resource summary

Question 1

Question
This phase of the cardiac cycle produces the S2 sound.
Answer
  • Rapid ejection
  • Reduced ejection
  • Isovolumetric relaxation
  • Rapid ventricular filling
  • Reduced ventricular filling

Question 2

Question
Which center of the brain is responsible for modulating the cardiac pacemaker and renal vasodilation?
Answer
  • Hypothalamus
  • Posterior pituitary
  • Medulla
  • Pons

Question 3

Question
An increase in which of the following values will make blood LESS turbulent?
Answer
  • Density of blood
  • Diameter of vessel
  • Velocity of blood
  • Viscosity of blood

Question 4

Question
Which of the following ions is responsible for the rapid depolarizing phase of the action potential in the SA node and AV node?
Answer
  • Na+
  • K+
  • Ca++
  • Cl-

Question 5

Question
Which of the following would result in vascular smooth muscle contraction?
Answer
  • Decreased [Ca++]
  • Increased [cAMP]
  • Increased [cGMP]
  • Endothelin

Question 6

Question
Which of the following muscarinic receptor subtypes is located in the heart?
Answer
  • M1
  • M2
  • M3
  • M4
  • M5

Question 7

Question
This phase of the cardiac cycle is when the S1 sound is heard.
Answer
  • Isovolumetric ventricular contraction
  • Rapid ejection
  • Reduced ejection
  • Isovolumetric relaxation
  • Rapid ventricular filling
  • Reduced ventricular filling

Question 8

Question
The sympathetic anatomic pathway causes a tachycardic effector response via norepinephrine binding to which receptor?
Answer
  • alpha1
  • alpha2
  • beta1
  • beta2

Question 9

Question
Which of the following as the greatest affinity for alpha 1 receptors?
Answer
  • Acetylcholine
  • Norepinephrine
  • Epinephrine
  • Isoproterenol

Question 10

Question
Which of the following has the largest internal radius?
Answer
  • Vena cava
  • Aorta
  • Small arteries
  • Arterioles
  • Capillaries

Question 11

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

Question 12

Question
Which adrenergic receptor is commonly found in the heart, salivary glands, adipose tissue and kidney?
Answer
  • alpha1
  • alpha2
  • beta1
  • beta2

Question 13

Question
S4 corresponds to?
Answer
  • 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

Question 14

Question
Which of the following would you expect if the diameter of vessel was decreased?
Answer
  • No significant change to flow
  • Increased laminar flow
  • Decreased turbulent flow
  • Increased Reynolds number

Question 15

Question
All preganglionic neurons whether sympathetic or parasympathetic release acetylcholine to stimulate which type of receptor?
Answer
  • M1 type muscarinic receptors
  • M2 type muscarinic receptors
  • M3 type muscarinic receptors
  • N1 type nicotinic receptors
  • N2 type nicotinic receptors

Question 16

Question
Preganglionic parasympathetic fibers originating in S2-S4 exit the spinal cord through the which region?
Answer
  • Dorsal roots
  • Ventral roots
  • Intermediolateral column
  • Medial column

Question 17

Question
Which of the following is not a sensory input of the autonomic nervous system?
Answer
  • Mechanoreceptors
  • Chemoreceptors
  • Golgi tendon organs
  • Nociceptors

Question 18

Question
Vasoconstriction in most blood vessels such as skin is produced from norepinephrine binding to which receptor?
Answer
  • alpha1
  • Alpha2
  • beta1
  • beta2

Question 19

Question
Where is the highest resistance to blood flow found?
Answer
  • Arteries
  • Arterioles
  • Capillaries
  • Venules
  • Veins

Question 20

Question
Where is the Na+ current not found?
Answer
  • SA node
  • Purkinje fibers
  • Atrial muscle
  • Ventricular muscle

Question 21

Question
The vagus nerve is the name for which cranial nerve?
Answer
  • III
  • VII
  • IX
  • X
  • XI

Question 22

Question
Which of the following has the greatest affinity for beta 1 and beta 2 receptors?
Answer
  • Isoprotenerol
  • Epinephrine
  • Norepinephrine
  • Acetylcholine

Question 23

Question
S3 corresponds to?
Answer
  • 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

Question 24

Question
Which of the following has the smallest aggregate cross-sectional area.
Answer
  • Vena cava
  • Aorta
  • Small arteries
  • Arterioles
  • Capillaries

Question 25

Question
What adrenergic receptor would you expect to find on arterioles that when activated cause constriction of smooth muscle reducing the vessel diameter?
Answer
  • Alpha1
  • Alpha2
  • Beta1
  • Beta2

Question 26

Question
What is the largest current in the heart?
Answer
  • Na+
  • Ca++
  • K+
  • Cl-

Question 27

Question
Which of the following cranial nerves is not a component of the parasympathetic nervous system?
Answer
  • III
  • VII
  • IX
  • X
  • Xi

Question 28

Question
Which of the following receptor types are inotropic?
Answer
  • Nicotinic
  • Muscarinic
  • Adrenergic

Question 29

Question
Mean linear velocity is greatest in which of the following types of vessels?
Answer
  • Vena cava
  • Aorta
  • Small arteries
  • Arterioles
  • Capillaries

Question 30

Question
The mechanism of action for this receptor involves inhibiting adenylyl cyclase , decreasing cAMP.
Answer
  • Alpha1
  • Alpha2
  • beta1
  • Beta2

Question 31

Question
Which of the following is innervated by the parasympathetic nervous system?
Answer
  • Erectile tissue
  • Sweat glands
  • All skeletal blood vessels
  • Adrenal gland

Question 32

Question
An opening snap corresponds to.
Answer
  • 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

Question 33

Question
Which of the following organs are innervated by the sympathetic chain ganglion instead of a pre-vetebral plexus ganglion?
Answer
  • Gallbladder
  • Liver
  • Large intestine
  • Heart
  • Bladder

Question 34

Question
In the circulatory system, where is the greatest decrease in pressure found?
Answer
  • Capillaries
  • Arterioles
  • Venules
  • Arteries
  • Veins

Question 35

Question
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?
Answer
  • Na+
  • K+
  • Ca++
  • Cl-

Question 36

Question
Which of the following receptors involves IP3 increasing intracellular Ca++?
Answer
  • Alpha1
  • Alpha2
  • Beta1
  • Beta2
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