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CH. 14 PHYSIOLOGY IUPUI DR. CLARK EXAM 3 2025 QUESTIONS AND ANSWERS

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CH. 14 PHYSIOLOGY IUPUI DR. CLARK EXAM 3 2025 QUESTIONS AND ANSWERS

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CH. 14 PHYSIOLOGY IUPUI DR.
CLARK EXAM 3 2025 QUESTIONS
AND ANSWERS


Sympathetic System affects the HEART using what? - ....ANSWER ...-1.

Catecholamines - Norepinephrine (neurons)

Epinephrine (adrenal gland)

B1 receptors




/\ activity of I(f) (ion-funny channels) --> /\ Na+ &

Ca+ permeability --> DEPOLARIZES FASTER




2. /\ CONDUCTION VELOCITY




3. /\ CONTRACTILITY

/\ Ca+ permeability



....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 1

, Why does the Sympathetic System increase contractility in the heart? -

....ANSWER ...-it increases Ca+ permeability--therefore calcium gets into

the contracting cells quicker. The more calcium present, the harder the contraction

is going to be.




aka--more Cross-Bridge Cycling


Cardiovascular control center is where in the brain? - ....ANSWER ...-

medulla oblongata

Sympathetic and parasympathetic neurons alter heart rate through which control

system? - ....ANSWER ...-antagonistic control


what neurons affect the heart with Parasympathetic system? -

....ANSWER ...-ACh


What receptors does the ACh used in Parasympathetic system bind to and in

which type of cells? - ....ANSWER ...-Muscarinic receptors of autorhythmic

cells




also the effector in this pathway




....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 2

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