Changes called male climacteric are a consequence of a(n) ________
A) decreased secretion of testosterone
B) increased secretion of progesterone
C) increased secretion of FSH and LH
D) increased secretion of GnRH
E) increased secretion of estrogens
A
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The functional unit of skeletal muscle is the
a. lengthens when the muscle contracts b. area between two Z lines. c. consists of just actin and myosin d. two of these answers. e. all of these answers.
Genotype is ________
A) an individual's actual genetic makeup B) the manner in which a particular trait is expressed C) the expression of sex chromosomes in an individual D) the diploid number of chromosomes in an individual
What do macrophages and neutrophils have in common?
A) Both kill pathogens by phagocytosis. B) Both are polymorphonuclear cells. C) Both are derived from lymphoblasts. D) Both secrete cytotoxic agents.
Which of the following is/are the primary function(s) of the digestive system?
A) mineral storage B) absorption of organic nutrients, minerals, vitamins, and water C) internal transport of cells and dissolved materials, including nutrients, wastes, and gases D) elimination of excess water, salts, and waste products E) All of the answers are correct.