Which of the following is correct about peripheral proteins?
A) They are bound to the inner or outer surface of plasma membrane.
B) They have regulatory functions.
C) They are also called transmembrane proteins.
D) They span the width of the plasma membrane at least one time.
E) They outnumber integral proteins.
Answer: A
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Why does a skeletal muscle fiber have more than one nucleus?
A) During development, the plasmalemmas of newly formed muscle fibers disintegrate, making many muscle cells into one. B) During development, groups of embryonic cells fuse together to form a single muscle fiber. C) During development, the nucleus of each myoblast replicates several times. D) During muscular activity, parts of each muscle fiber break down, and the remaining parts, including their nuclei, fuse into new combination fibers. E) All of the answers are correct.
Which of the following labels best matches osteocyte?
A) stem cell B) dissolves matrix C) mature bone cell D) secretes organic matrix E) immature bone cell
A movement that turns the sole of the foot inward is an example of
A) elevation. B) inversion. C) opposition. D) protraction. E) None of the answers are correct.
Glands within the lamina propria of the respiratory mucosa secrete
A) hormones. B) saliva. C) mucus. D) sweat. E) acids.