Each seminiferous tubule has the form of a U connected to a single ________.
Fill in the blank(s) with the appropriate word(s).
straight tubule
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Elevated antibody production during a primary response generally lasts for months or years, whereas antibody production in secondary responses decreases to baseline level generally within a couple of weeks
Indicate whether this statement is true or false.
Which of these is an inclusion, not an organelle?
A) lysosome B) microtubule C) cilia D) melanin
Many upper motor neurons synapse with lower motor neurons in the ________.
A. posterior funiculus B. posterior horn C. posterior root ganglion D. anterior horn E. anterior funiculus
Which of the following is not a function of the kidneys?
a. they contribute significantly to long-term regulation of arterial blood pressure by maintaining the proper plasma volume. b. they act directly on the interstitial fluid, the fluid that bathes the cells, to maintain constancy in its composition. c. they excrete the metabolic waste products. d. they assist in maintaining the proper acid-base balance of the body. e. they secrete several hormones.