Some immunocompetent cells will never encounter an antigen to which they can bind and therefore will never be called to service in our lifetime
Indicate whether the statement is true or false
TRUE
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Which of the following hormones increases and prolongs effects of the sympathetic nervous system?
A) cortisol B) parathyroid hormone C) insulin D) growth hormone E) acetylcholine
Hormones
a. are all of similar chemical composition b. combine with specific receptors on the target cell's surface or inside the target cell c. are secreted at a constant rate d. all act by activating adenylate cyclase, which transforms ATP into cyclic AMP e. have all of the above characteristics
The affinity of adult hemoglobin for oxygen is greater than the affinity of fetal hemoglobin for oxygen
Indicate whether the statement is true or false.
The muscle that assists in mastication, and is also useful in playing a trumpet, is the ________ muscle.
Fill in the blank(s) with the appropriate word(s).