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Cadiac Physiology Multiple Choice Questions
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Questions in this quiz (36)
1This phase of the cardiac cycle produces the S2 sound.
- ARapid ejection
- BReduced ejection
- CIsovolumetric relaxation
- DRapid ventricular filling
- EReduced ventricular filling
2Which center of the brain is responsible for modulating the cardiac pacemaker and renal vasodilation?
- AHypothalamus
- BPosterior pituitary
- CMedulla
- DPons
3An increase in which of the following values will make blood LESS turbulent?
- ADensity of blood
- BDiameter of vessel
- CVelocity of blood
- DViscosity of blood
4Which of the following ions is responsible for the rapid depolarizing phase of the action potential in the SA node and AV node?
- ANa+
- BK+
- CCa++
- DCl-
5Which of the following would result in vascular smooth muscle contraction?
- ADecreased [Ca++]
- BIncreased [cAMP]
- CIncreased [cGMP]
- DEndothelin
6Which of the following muscarinic receptor subtypes is located in the heart?
- AM1
- BM2
- CM3
- DM4
- EM5
7This phase of the cardiac cycle is when the S1 sound is heard.
- AIsovolumetric ventricular contraction
- BRapid ejection
- CReduced ejection
- DIsovolumetric relaxation
- ERapid ventricular filling
- FReduced ventricular filling
8The sympathetic anatomic pathway causes a tachycardic effector response via norepinephrine binding to which receptor?
- Aalpha1
- Balpha2
- Cbeta1
- Dbeta2
9Which of the following as the greatest affinity for alpha 1 receptors?
- AAcetylcholine
- BNorepinephrine
- CEpinephrine
- DIsoproterenol
10Which of the following has the largest internal radius?
- AVena cava
- BAorta
- CSmall arteries
- DArterioles
- ECapillaries
11Which of the following statements concerning the sympathetic nervous system is TRUE?
- AMost preganglionic sympathetic axons are unmyelinated
- BThe chain of sympathetic ganglia extends from the upper neck (C2-3) to the coccyx
- CThe postganglionic axons rejoin the spinal nerves via the white rami communicantes
- DSympathetic preganglionic axons release acetylcholine to activate muscarinic receptors.
- EPreganglionic sympathetic cell bodies are located within the ventral horn
12Which adrenergic receptor is commonly found in the heart, salivary glands, adipose tissue and kidney?
- Aalpha1
- Balpha2
- Cbeta1
- Dbeta2
13S4 corresponds to?
- AClosure of mitral and tricuspid valves
- BClosure of aortic and pulmonary valves
- COpening of stenotic mitral valve
- DDiastolic filling gallop or ventricular or protodiastolic gallup
- EAtrial sound that creates an atrial or presystolic gallup
14Which of the following would you expect if the diameter of vessel was decreased?
- ANo significant change to flow
- BIncreased laminar flow
- CDecreased turbulent flow
- DIncreased Reynolds number
15All preganglionic neurons whether sympathetic or parasympathetic release acetylcholine to stimulate which type of receptor?
- AM1 type muscarinic receptors
- BM2 type muscarinic receptors
- CM3 type muscarinic receptors
- DN1 type nicotinic receptors
- EN2 type nicotinic receptors
16Preganglionic parasympathetic fibers originating in S2-S4 exit the spinal cord through the which region?
- ADorsal roots
- BVentral roots
- CIntermediolateral column
- DMedial column
17Which of the following is not a sensory input of the autonomic nervous system?
- AMechanoreceptors
- BChemoreceptors
- CGolgi tendon organs
- DNociceptors
18Vasoconstriction in most blood vessels such as skin is produced from norepinephrine binding to which receptor?
- Aalpha1
- BAlpha2
- Cbeta1
- Dbeta2
19Where is the highest resistance to blood flow found?
- AArteries
- BArterioles
- CCapillaries
- DVenules
- EVeins
20Where is the Na+ current not found?
- ASA node
- BPurkinje fibers
- CAtrial muscle
- DVentricular muscle
21The vagus nerve is the name for which cranial nerve?
- AIII
- BVII
- CIX
- DX
- EXI
22Which of the following has the greatest affinity for beta 1 and beta 2 receptors?
- AIsoprotenerol
- BEpinephrine
- CNorepinephrine
- DAcetylcholine
23S3 corresponds to?
- AClosure of mitral and tricuspid valves
- BClosure of aortic and pulmonary valves
- COpening of a stenotic mitral valve
- DDiastolic filling gallup or ventricular or Ignore gallop
- EAtrial sound that creates and atrial or presystolic gallop
24Which of the following has the smallest aggregate cross-sectional area.
- AVena cava
- BAorta
- CSmall arteries
- DArterioles
- ECapillaries
25What adrenergic receptor would you expect to find on arterioles that when activated cause constriction of smooth muscle reducing the vessel diameter?
- AAlpha1
- BAlpha2
- CBeta1
- DBeta2
26What is the largest current in the heart?
- ANa+
- BCa++
- CK+
- DCl-
27 Which of the following cranial nerves is not a component of the parasympathetic nervous system?
- AIII
- BVII
- CIX
- DX
- EXi
28Which of the following receptor types are inotropic?
- ANicotinic
- BMuscarinic
- CAdrenergic
29Mean linear velocity is greatest in which of the following types of vessels?
- AVena cava
- BAorta
- CSmall arteries
- DArterioles
- ECapillaries
30The mechanism of action for this receptor involves inhibiting adenylyl cyclase , decreasing cAMP.
- AAlpha1
- BAlpha2
- Cbeta1
- DBeta2
31Which of the following is innervated by the parasympathetic nervous system?
- AErectile tissue
- BSweat glands
- CAll skeletal blood vessels
- DAdrenal gland
32An opening snap corresponds to.
- AClosure of aortic and pulmonary valves
- BClosure of mitral and tricuspid valves
- COpening of a stenotic mitral valve
- DDiastolic filling gallop or ventriculoar protosystodiastolic gallop
33Which of the following organs are innervated by the sympathetic chain ganglion instead of a pre-vetebral plexus ganglion?
- AGallbladder
- BLiver
- CLarge intestine
- DHeart
- EBladder
34In the circulatory system, where is the greatest decrease in pressure found?
- ACapillaries
- BArterioles
- CVenules
- DArteries
- EVeins
35Which of the following is responsible for the rapid depolarizing phase of the action potential in the atrial and ventricular muscle and in Purkinje fibers?
- ANa+
- BK+
- CCa++
- DCl-
36Which of the following receptors involves IP3 increasing intracellular Ca++?
- AAlpha1
- BAlpha2
- CBeta1
- DBeta2
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- 1 PA School Quiz on Cadiac Physiology Multiple Choice Questions, created by Elle Ashe on 12/02/2017.
- Author
- Elle Ashe
- Language
- English
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