Which of these proteins functions to store or transport iron?
A) hemoglobin
B) ferritin
C) hemosiderin
D) transferrin
E) ferritin, hemosiderin, and transferrin
E
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A steroid hormone acts on a target cell by
A. causing a second messenger to be formed. B. causing the cell to divide. C. directly causing protein synthesis. D. promoting phagocytosis.
When a muscle relaxes,
A. crossbridges form and muscle extensibility returns the muscle to rest length. B. crossbridges form and muscle elasticity returns the muscle to rest length. C. crossbridges stop forming and muscle elasticity returns the muscle to rest length. D. crossbridges stop forming and muscle extensibility returns the muscle to rest length
Which tonsils are the largest and most frequently infected?
A. Crypt tonsils B. Adenoids C. Pharyngeal tonsils D. Palatine tonsils E. Lingual tonsils
Which unicellular gland is responsible for mucus secretion?
A) adipocyte B) fibroblast C) goblet cell D) mast cell