The tissue that binds organs together and provides protection and support for the organs is the ________ tissue.
A. nerve
B. epithelial
C. connective
D. muscle
Answer: C
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Cytotoxic T cells
A. secrete perforin, which kills bacteria and viruses by perforating the membrane or coat that surrounds them. B. secrete proteins that neutralize bacterial toxins. C. are activated by interleukin 1. D. are converted to plasma cells when activated by MHC proteins. E. require Class I MHC proteins to recognize foreign antigens.
Which of the labeled structures in the diagram is a cutaneous mechanoreceptor that senses pressure and fast vibrations?
a) A b) B c) C d) D e) E
The neurotransmitter at a neuromuscular junction is
a. acetylcholine b. the same as the transmitter substance at parasympathetic postganglionic nerve endings c. the same as that released by all preganglionic fibers d. all of the above e. only a and b
Aldosterone will cause ________ of sodium, while ANH will cause ________ of sodium.
A. reabsorption; excretion B. excretion; reabsorption