How is autocrine regulation best described?
A. Chemical regulators are released directly into blood vessels.
B. Chemical regulators released by cells affect the functional status of different kinds of cells in the vicinity of the secretory cell.
C. Chemical regulators affect the same cells that produce them.
D. Chemical regulators reach their site of action through a duct.
E. Chemical regulators are continuously released in constant amounts by the cell.
C
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The corners of the scapula include (the)
A) superior angle, medial angle, and lateral angle. B) inferior angle, lateral angle, and axillary angle. C) superior angle, inferior angle, and lateral angle. D) inferior angle, medial angle, and vertebral angle. E) None of the answers are correct.
Over 50 different neurotransmitters have been identified, but the best known is
A) norepinephrine. B) acetylcholine. C) epinephrine. D) glutamate. E) GABA.
Which statement about fixed action patterns is NOT true?
a. They occur in both vertebrates and invertebrates. b. They are not considered to be reflexes. c. They use command fibers located in the central nervous system. d. They are generated in response to a specific stimulus. e. A species of animals will carry out the behavior in the same manner.
Where does each half of the visual field get segregated so that it reaches the opposite hemisphere of the brain?
A) optic chiasma B) lateral geniculate nucleus C) hypothalamus D) occipital lobe