The superficial hard part of the inner ear is called the ________ and contains ________.
-membranous labyrinth; perilymph
-bony labyrinth; perilymph
-membranous labyrinth; endolymph
-cochlea; perilymph
-bony labyrinth; endolymph
bony labyrinth; perilymph
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The second-messenger mechanism of hormone action operates by ________.
A) synthesizing more of the hormone than is actually needed B) increasing the basal metabolic rate in the target organ C) not responding to a feedback mechanism D) binding to specific receptors and employing the services of G proteins and cAMP
Answer the following statements true (T) or false (F)
1. Golgi tendon receptors and muscle spindles are both proprioceptors but are able to sense different things. 2. Meissner’s corpuscles respond to pain. 3. Ruffini’s corpuscles respond to touch and pressure. 4. Pacinian corpuscles respond to high-frequency vibrations. 5. The highest concentration of general sense organs is in the epidermis of the skin.
Which of the following choices most accurately represents the sequence of steps occurring in the contraction cycle? The events numbered 1 through 6 may be used more than once. 1 . Mysoin binds ATP 2 . Mysoin hydrolyzes ATP and goes into cocked position 3 . Myosin releases ADP and inorganic phosphate 4 . Myosin binds actin filament 5 . Power stroke 6 . Myosin releases actin filament
a. 1, 2, 3, 4, 5, 6, 1 b. 1, 2, 4, 3, 5, 1, 6 c. 1, 6, 2, 4, 3, 5, 1, 6 d. 1, 2, 6, 3, 4, 5, 6, 1 e. None of these.
If insulin secretion is too low or its receptors are insensitive, all of the following effects are seen, except
A. high blood glucose levels. B. increased uptake of glucose to cells. C. increased thirst. D. polyuria. E. polyphagia.