When a catecholamine or peptide hormone binds to receptors on the surface of a cell, the
A) hormone receptor complex moves into the cytoplasm.
B) cell membrane becomes depolarized.
C) second messenger appears in the cytoplasm.
D) cell becomes inactive.
E) hormone is transported to the nucleus where it alters the activity of DNA.
Answer: C
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Answer the following statements true (T) or false (F)
1. T lymphocytes mature in the thymus. 2. The thymus reaches its largest functional size in mid-adulthood. 3. The tonsils located near the base of the tongue are called the palatine tonsils. 4. The tonsils located on either side of the throat are called the lingual tonsils. 5. The pharyngeal tonsils are also known as the adenoids.
Carbon dioxide is transported in the blood mostly as __________.
a. carbaminohemoglobin b. a bicarbonate ion c. soluble in plasma d. none of the listed responses
Diarthroses joints are freely movable
a. true b. false
Which types of connections allow epithelial cells to form strong membranes?
A. Keratinized B. Basement membranes C. Junctional complexes D. Intercalated discs