To synthesize thyroid hormones, iodine is attached to:
A. cholesterol.
B. the amino acid tyrosine.
C. the amino acid tryptophan.
D. acetyl coenzyme A.
E. the amino acid phenylalanine.
B
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An abnormal collection of fluid within the testes is called ________.
A. hydrocele B. cryptorchidism C. prostatitis D. benign prostatic hyperplasia
The thin sheet of lubricant that is secreted between serous membrane layers is referred to as ________.
Fill in the blank(s) with the appropriate word(s).
How are hypoxia and anoxia different?
A) Hypoxia is low tissue oxygen levels; anoxia is the complete cutoff of oxygen supply. B) Hypoxia is low tissue oxygen levels; anoxia is low tissue carbon dioxide levels. C) Hypoxia is low tissue carbon dioxide levels; anoxia is low tissue oxygen levels. D) Hypoxia is low lung oxygen levels; anoxia is low lung carbon dioxide levels. E) Hypoxia is low lung carbon dioxide levels; anoxia is low lung oxygen levels.
The force of contraction of cardiac muscle is typically increased by:
A. increased Ca++ extrusion by the Na+-Ca++ antiporter in cardiac muscle B. an increase in myosin phosphorylation in cardiac muscle C. a decrease in cytosolic [Ca++] in the cardiac muscle D. ?-adrenergic stimulation of the cardiac muscle E. recruiting more cardiac muscle cells