A drug that interferes with the active transport of Ca2+ from the sarcoplasm back into the sarcoplasmic reticulum would result in
A. fibrosis of the muscle.
B. relaxation of the muscle fiber.
C. an imbalance of blood calcium.
D. contraction with no relaxation.
E. muscle hypertrophy.
Answer: D
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During an ________ contraction, the length of the muscle does not change.
Fill in the blank(s) with the appropriate word(s).
Which of the following statements related to the "ON pathway" of the visual system is correct?
A. Bipolar cells spontaneously depolarize in the absence of input from photoreceptor cells. B. Glutamate receptors on bipolar cells are excitatory. C. Only cones are associated with bipolar cells of the "ON pathway," rods are not. D. Bipolar cells fire action potentials only when bright light strikes the photoreceptors linked to them. E. Bipolar cells hyperpolarize in the absence of input from photoreceptor cells.
The fluid contained in the nucleus is the ________.
Fill in the blank(s) with the appropriate word(s).
The response by which leukocytes engulf, digest, and destroy pathogens is called:
a. Hemocytosis b. Leukocytosis c. Macrocytosis d. Phagocytosis