The two principal divisions of the peripheral nervous system are the:
a. somatic and autonomic systems
b. sympathetic and parasympathetic systems
c. peripheral and central systems
d. afferent and autonomic systems
e. cranial and skeletal nerves
a
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Clusters of nerve cell bodies that function as a local
integrating center are a. nerve cords. b. ganglia. c. a plexus. d. notochords. e. nerves.
The ends of DNA molecules cut by restriction enzymes are "sticky" because
A. the enzymes coat them with protective, complex polysaccharides. B. unless a second enzyme is added, the fragments stick to the restriction enzymes. C. they are single-stranded. D. the enzymes cut each strand of the DNA at different places. E. they are single-stranded and the enzymes cut each strand of the DNA at different places.
A root hair is an extension of a(n) endodermal cell. Indicate whether the statement is true or false
Osmometer cells in the brain sense an increase in the salt concentration of plasma. This information is sent to the hypothalamus, which notifies the pituitary gland to release the hormone, ADH. ADH causes the kidney to save water, which lowers the salt concentration of the plasma. What characteristic of life does this overall pathway represent?
A. Cellular organization B. Energy utilization C. Evolutionary adaptation D. Homeostasis E. Sensitivity