Malignant hyperthermia is a hereditary disorder that can increase surgical risk because temperature may be elevated during certain types of anesthesia.The cause of the increased temperature is an increase in cytosolic Ca++ level as a result of an anesthetic-induced:
A) Increase in Ca++ release from the SR,as a result of a mutation in the ryanodine receptor.
B) Decrease in Ca++ uptake by the SR,as a result of a mutation in SERCA.
C) Increase in frequency of the rupturing of skeletal muscle fibers.
D) Decrease in Ca++ extrusion,as a result of hyperphosphorylation of the plasmalemmal Ca++ pump.
E) Increase in Ca++ influx,as a result of a mutation in N-type Ca++ channels.
Correct Answer:
Verified
Q1: Stretching a skeletal muscle beyond rest length
Q2: Relaxation of skeletal muscle after contraction requires:
A)Ca++
Q3: The speed of contraction of skeletal muscle
Q5: The ability to develop increasing levels of
Q6: Endurance training typically increases:
A)Ca++ influx into the
Q7: The force of contraction of skeletal muscle
Q8: In the absence of extracellular Ca++,an action
Q9: During intense exercise,fatigue of skeletal muscle occurs
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