What happens to the polar bodies that are produced during oogenesis?
A. They help to form the placenta.
B. They are incorporated into the inner cell mass.
C. They degenerate.
D. They provide yolk to nourish the early embryo.
E. They participate in the formation of the extra-embryonic membranes.
Answer: C
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Cytotoxic T cells destroy
A) T cells. B) cancer cells and virus-containing cells. C) all antigen-bearing cells. D) cytotoxic cells.
The receptors for the baroreceptor reflex are located in the ____________________ and ____________________, whereas the integrating center is the ____________________ located in the ____________________. The efferent pathway for this reflex is the ____________________. The effector organs are the ____________________ and ____________________
Fill in the blank(s) with correct word
What is the function of keratin, a protein found in the epidermis of the skin?
A.) Protection B.) Oxygen binding C.) Sensation D.) Temperature regulation E.) Waste elimination
Organize the following list of nervous system elements by their classifications as CNS or PNS elements: oligodendrocytes, thermoreceptors (nerves that sense temperature), interneurons, satellite cells, brain, motor neurons.
A. CNS interneurons, satellite cells, motor neurons; PNS brain, oligodendrocytes, theromoreceptors B. CNS thermoreceptors, satellite cells, brain; PNS oligodendrocytes, interneurons, motor neurons C. CNS brain, oligodendrocytes, interneurons; PNS thermoreceptors, satellite cells, motor neurons D. CNS satellite cells, brain, oligodendrocytes; PNS thermoreceptors, motor neurons, interneurons