Human chorionic gonadotropin
a. is secreted from the corpus luteum
b. in the urine is the basis of pregnancy diagnosis tests
c. stimulates placental secretion of estrogen and progesterone
d. is secreted from the myometrium
e. is secreted from the sperm cell involved in fertilization
B
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Visual pigments are derivatives of the compound
A) retinal. B) opsin. C) rhodopsin. D) transducin. E) cGMP.
A subthreshold stimulus
A) produces an afterpotential. B) produces a graded (local) potential. C) causes an all-or-none response. D) produces more action potentials than a submaximal stimulus.
Body odor results from secretions from the ________ sweat glands.
A. merocrine B. eccrine C. apocrine D. ceruminous E. sebaceous
Which statement about special senses is false?
A. Special sense organs are used for taste, smell, hearing, equilibrium and vision. B. Special sense organs are not located all over the body and are not used for touch, stretch, heat, cold and pain. C. Special senses involve organs located only in the head. D. Special senses are simple receptors in the skin, muscles, joints, tendons, and organs.