To produce smooth movement at a joint:
a. the prime mover and antagonists must contract
b. the antagonist and synergists must contract
c. the prime mover and synergists must contract
d. both A and B above
c. the prime mover and synergists must contract
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If steroid hormones must be bound to protein carriers to travel through the blood, how are they able to bind to intracellular receptors? (The protein carriers cannot diffuse through the membrane.)
What will be an ideal response?
Exocrine glands that secrete a watery solution that usually contains enzymes are called
A) endocrine glands. B) serous glands. C) mixed exocrine glands. D) mucous glands. E) None of the answers are correct.
The major determinant of the resting potential of all cells is
A) K+ concentration inside cells. B) Ca2+ concentration in the blood and interstitial fluid. C) Na+ concentration in the blood and interstitial fluid. D) K+ gradient between the blood and interstitial fluid. E) Na+ concentration inside cells.
The ectoderm forms which of the following?
A) muscle B) all lymphatic structures C) the cardiovascular system D) the thymus, thyroid gland, and pancreas E) all neural tissues