Muscle hypertrophy is due to ________.
A. increased number of muscle fibers
B. increased number of myofibrils in the muscle fiber
C. increased size of the myofibrils
D. Both increased number of myofibrils in the muscle fiber and increased size of the myofibrils.
Answer: D
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A rounded articular projection supported on a constricted portion (neck) of a bone is called a
a) foramen. b) condyle. c) tuberosity. d) head. e) trochanter.
Our ability to precisely locate a stimulus is ________ proportional to receptive field size
A. directly B. inversely
Answer the following statements true (T) or false (F)
1. The nicotine in cigarette smoke stimulates the cilia to beat rapidly in both directions, stopping the efficient removal of the trapped debris. 2. Another name for nostrils is the right and left nasal cavities. 3. The four paranasal sinuses are named for the bones in which they are found. They are the frontal, parietal, sphenoidal, and ethmoidal. 4. The functions of the paranasal sinuses include lightening the bones of the skull and serving as a resonant chamber for sound. 5. The lacrimal sacs drain tears into the nasopharynx.
An activated ________ rapidly divides to form a clone of plasma cells, which produce antibodies and memory cells.
A. antigen presenting cell B. T lymphocyte C. macrophage D. B lymphocyte