Kin 267 Cardiorespiratory System
Authored by Mya M
Biology
University
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61 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Stimulation of sinoatrial node by sympathetic system nerves results in an increase of heart rate
Positive chronotropic effect
Positive inotropic effect
Positive dromotropic effect
Negative chronotropic effect:
Negative inotropic effect
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Stimulation of atria & ventricles by sympathetic nervous system causes an elevation in intracellular (Ca2+), increasing contractility
Positive chronotropic effect
Positive inotropic effect
Positive dromotropic effect
Negative chronotropic effect:
Negative inotropic effect
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Stimulation of sinoatrial & atrioventricular nodes by sympathetic nervous system enhances conductivity of electrical signal, such as increasing AV conduction velocity
Positive chronotropic effect
Positive inotropic effect
Positive dromotropic effect
Negative chronotropic effect:
Negative inotropic effect
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Stimulation of sinoatrial node by Vagus nerve lowers heart rate
Negative dromotropic effect
Positive inotropic effect
Positive dromotropic effect
Negative chronotropic effect:
Negative inotropic effect
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
currently questionable since Vagus nerve does not directly innervate cardiomyocytes other than sinoatrial & atrioventricular nodes.
Negative dromotropic effect
Positive inotropic effect
Positive dromotropic effect
Negative chronotropic effect:
Negative inotropic effect
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Stimulation of sinoatrial & atrioventricular nodes by Vagus nerve inhibits conductivity of electrical signal, such as increasing AV conduction velocity
Negative dromotropic effect
Positive inotropic effect
Positive dromotropic effect
Negative chronotropic effect:
Negative inotropic effect
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
are specialized, striated muscle cells that make up heart muscle (myocardium) & are responsible for its rhythmic contractions
Cardiomyocytes
Myofibrils
Mitochondria
Gap Junctions
Contractile Cardiomyocytes
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