Produces antibodies that neutralize foreign substances.
A) Lymphatic
B) Cardiovascular
C) Immune
D) Endocrine
C) Immune
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Which value related to semen production is correct?
a. average volume ejaculated is 1 ml b. total sperm count averages about 100 million c. maximal sperm count is about 400 million d. semen contains only sperm e. none of the above
Answer the following questions true (T) or false (F)
1. The conduction of an action potential is faster in unmyelinated axons than in myelinated axons. 2. Regeneration of neural tissue in the peripheral nervous system (PNS) is possible only if the neuron's cell body remains intact. 3. During depolarization, the membrane potential becomes more positive.
The target tissue for melatonin is the __________________
A. gonads. B. anterior pituitary. C. posterior pituitary. D. liver. E. hypothalamus.
Action potentials are conducted more rapidly along ___ axons.
Fill in the blank(s) with the appropriate word(s).