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Set 5 11 Regulation Of Perfusion

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Question 1

(Multiple Choice)

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Pharmacom echanical coupling in vascular smooth muscle

A) Links membrane potential to contraction
B) Links binding of a neurotransmitter or hormone to contraction
C) Links binding of neurotransmitter to membrane potential
D) Requires a membrane potential change on the muscle cell
E) Requires a membrane potential change on the SR membrane

Answer

Question 2

(Multiple Choice)

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Electrom echanical coupling in vascular smooth m uscle

A) Links electric fields around the myofilaments to the production of force
B) Couples membrane potential of one cell to that of another
C) Is responsible for the formation of the functional syncytium
D) Couples membrane depolarization to the influx of Ca2+
E) Directly links MLCK to a membrane channel

Answer

Question 3

(Multiple Choice)

Free
Inhibiting the activity of MLCP should

A) Increase the force of contraction without increasing [Ca2+]
B) Increase the force of contraction due to increased [Ca2+]
C) Increase the force of contraction because of decreased myosin light chain
phosphorylation
D) Decrease the force of contraction due to decreased [Ca2+]
E) Decrease the force of contraction because of decreased myosin light chain
phosphorylation

Answer