When an antigen triggers the multiplication of B lymphocytes, some daughter cells transform into antibody-producing cells and mount an attack, while others become what?
A. Natural killer cells
B. Memory cells
C. Plasma cells
D. Helper cells
E. Suppressor cells
B. Memory cells
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In the case of a person who consumes a normal, balanced diet, proteins are essential to the body for all of the following except ________.
A) production of energy B) production of some hormones C) production of enzymes, clotting factors, and antibodies D) formation of functional molecules like hemoglobin and cytochromes
External neural and hormonal regulation are ways to modulate
a. smooth muscle and glands directly. b. the nerve plexuses. c. smooth muscle only. d. glands only. e. all of these.
Which brain structure is responsible for the "startle reflex" in response to loud sounds?
a) Superior colliculus b) Inferior colliculus c) Pontine nucleus d) Medial lemniscus e) Arbor vitae
If you compare a cell with a manufacturing plant that exports goods, the cell's ________ could be compared to the manufacturing plant's shipping department.
A. endoplasmic reticulum B. lysosome C. nucleus D. Golgi apparatus E. ribosome