After suffering nerve damage, an accident victim is unable to flex his right thigh, or extend his right leg. The nerve most likely damaged is the
A) common fibular nerve.
B) femoral nerve.
C) obturator nerve.
D) tibial nerve.
E) coccygeal plexus.
Ans: B) femoral nerve.
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Immediately following the arrival of the stimulus at a skeletal muscle cell there is a short period called the ________ period during which the events of excitation-contraction coupling occur.
A) contraction B) relaxation C) latent D) refractory
Opening a gated channel that allows Na+ to diffuse through the plasma membrane would cause the membrane potential to increase
Indicate whether the statement is true or false
Parasympathetic stimulation ____ heart rate and ____ the motility in the digestive tract
a. does not affect, increases. b. decreases, decreases. c. decreases, increases. d. increases, decreases. e. increases, increases.
Respiratory acidosis can be a result of ______
A) hyperventilation B) a panic attack C) hyperventilation and a panic attack D) asthma and hyperventilation E) asthma