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NWHSU Physiology I Class 13 Contractility of the Heart Questions and Answers (100% Pass)
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NWHSU Physiology I Class 13 Contractility of the Heart Questions and Answers (100% Pass)
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1|Page | © copyright 2024/2025 | Grade A+NWHSU Physiology I Class 13
Contractility of the Heart Questions
and Answers (100% Pass)
Sympathetic
✓ Norepinephrine is associated with the (Sympathetic/Parasympathetic)
Nervous System
Sympathetic
✓ Beta 1 Receptors are associated with the
(Sympathetic/Parasympathetic) Nervous System
Parasympathetic
✓ Acetylcholine is associated with the (Sympathetic/Parasympathetic)
Nervous System
Parasympathetic
✓ M2 Receptors are associated with the (Sympathetic/Parasympathetic)
Nervous System
Master01 | October, 2024/2025 | Latest update
, 1|Page | © copyright 2024/2025 | Grade A+
If the sympathetic nervous system acts on the heart the rate of depolarization
will *increase*, Ca2+ conductance will *increase*, the contractility of the
heart will *increase*, and the threshold potential will *decrease*.
✓ If the sympathetic nervous system acts on the heart the rate of
depolarization will (increase/decrease), Ca2+ conductance will
(increase/decrease), the contractility of the heart will
(increase/decrease), and the threshold potential will
(increase/decrease).
Sympathetic
✓ Your heart rate is increasing during cardiovascular exercise. What
nervous system is primarily acting on the heart?
If the sympathetic nervous system acts on the heart the threshold potential
will *decrease* and your heart rate will *increase*.
✓ If the sympathetic nervous system acts on the heart the threshold
potential will (increase/decrease) and your heart rate will
(increase/decrease).
If the parasympathetic nervous system acts on the heart the rate of
depolarization will *decrease*, Ca2+ conductance will *decrease*, the
Master01 | October, 2024/2025 | Latest update
, 1|Page | © copyright 2024/2025 | Grade A+
contractility of the heart will *decrease*, and the threshold potential will
*increase*.
✓ If the parasympathetic nervous system acts on the heart the rate of
depolarization will (increase/decrease), Ca2+ conductance will
(increase/decrease), the contractility of the heart will
(increase/decrease), and the threshold potential will
(increase/decrease).
If the parasympathetic nervous system acts on the heart the threshold
potential will *increase* and your heart rate will *decrease*.
✓ If the parasympathetic nervous system acts on the heart the threshold
potential will (increase/decrease) and your heart rate will
(increase/decrease).
Heart rate. If heart rate increases, contractility increases.
✓ Contractility is directly related to what?
Intracellular calcium
✓ If you are experiencing an increase in heart rate and contractility, it is
occuring due to (intra/extra) cellular calcium
NE
Master01 | October, 2024/2025 | Latest update
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