In which of the following situations does a resting membrane potential exist?
A. A stimulated sensory receptor in the skin
B. A conducting neuron
C. A relaxed muscle fiber
D. The eye seeing an image
E. A contracting cardiac muscle cell
Answer: C
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Which of the following is a series of convulsive inhalations followed by a single prolonged exhalation where the rima glottidis closes earlier than normal after each inhalation so only a little air enters the lung with each inhalation?
a) sobbing b) sneezing c) coughing d) hiccupping e) Valsalva maneuver
The main difference between active and passive transport is:
a. the amount of material moved b. the direction in which the material is moved c. whether cell energy is required d. the type of cell involved
__________________ refers to an excessive loss of bone mass and strength resulting in one or more fractures. ________________________________________
Fill in the blank(s) with the appropriate word(s).
A muscle ________ contains a sarcolemma, sarcoplasm, myofilaments, and myofibrils.
A) fiber B) intercalated disc C) T-tubule D) myofibril E) motor end plate