Where is dystrophin, the protein that is defective in muscular dystrophy, normally found?
A. As a transmembrane protein of the sarcolemma
B. In the Z discs of skeletal and cardiac muscle
C. Between the outermost myofilaments and the sarcolemma of a muscle fiber
D. Bridging the gap between the sarcolemma and axon terminal
E. In the dense bodies of smooth muscle
Answer: C
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The ____________________ is the principal site for metabolic interconversions of nutrient molecules
Fill in the blank(s) with correct word
________ glands (such as tear glands) have vesicles that release their secretion via exocytosis. ________ glands (such as oil-producing glands) secrete a mixture of disintegrated cells and their products.
A. Endocrine; Exocrine B. Exocrine; Apocrine C. Mucous; Cutaneous D. Mucous; Serous E. Merocrine; Holocrine
Polysynaptic reflexes may produce more complicated responses than monosynaptic reflexes because the former involve more than one ________.
Fill in the blank(s) with the appropriate word(s).
During the peak of the action potential which ion has the greatest permeability?
a. sodium. b. potassium. c. calcium. d. chloride. e. protein.