Although you get wet while swimming, which tough protein within the skin prevents it from soaking up moisture like a sponge?
A) serous fluid
B) melanin
C) mucus
D) carotene
E) keratin
E
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Which cell structure regulates the composition of the intracellular fluid?
A. Ribosomes B. Nucleus C. Endoplasmic reticulum D. Cell wall E. Plasma membrane
The main source of enzymes that cleave disaccharides into monosaccharides is:
A. the pancreas. B. the liver. C. gastric secretory cells. D. the luminal membrane of epithelial cells in the small intestine. E. the salivary glands.
Which of the following is NOT true concerning oxytocin?
A. Oxytocin produces milk let-down during nursing. B. Oxytocin release in childbirth is controlled by positive feedback. C. Oxytocin increases uterine contractions during childbirth. D. Oxytocin is a steroid hormone.
Which of the choices below describes the pathway of cellular respiration (the complete oxidation of glucose)?
A) lipolysis, glycogenolysis, beta oxidation B) glycogenesis, lipogenesis, electron transport chain C) glycolysis, citric acid (Krebs) cycle, electron transport chain, oxidative phosphorylation D) gluconeogenesis, citric acid (Krebs) cycle, lipolysis