Unformatted text preview: els ____, the blood pressure ____, and the velocity of blood flow ____. A) decreases . . . drops. . . slows B) decreases. . . increases . . . increases C) decreases. . . drops . . . increases D) increases. . . drops . . . slows 39. Which of these statements for erythrocytes is true? A) The main function of erythrocytes is to carry nutrients. B) Erythrocytes in adult humans have nuclei. C) Each erythrocyte contains about 1 million hemoglobin. D) Erythrocytes are shaped like biconcave disks. 40. The body's innate defenses against infection include A) several nonspecific antibodies. B) memory cells. C) hormone production and changes in circulation. D) barriers such as dead skin cells and mucus. 41. Which of the following statements about the humoral immune response is true? A) humoral immune response activates T cells. B) humoral immune response protects from cancer cells. C) humoral immune response defends primarily against bacteria and viruses present in body fluids. D) humoral immune response is the result of macrophages 42. Which of the following statements regarding saltwater fish is true? A) concentration of solutes in internal fluids of saltwater fish is much lower than in the surrounding water. B) concentration of solutes in internal fluids of saltwater fish is higher than in the surrounding environment. C) Saltwater fish produce large amounts of diluted urine. D) Saltwater fish must visit freshwater streams and rivers entering the ocean to maintain correct concentration 43. Which of following options correctly lists structures in kidney in order in which fluid flows through them? A) Bowman's capsule, Henle, distal tubule, glomerulus B) Bowman's capsule, proximal tubule, loop of Henle, distal tubule, glomerulus C) glomerulus, Bowman's capsule, proximal tubule, loop of Henle, distal tubule D) glomerulus, proximal tubule, capsule, loop of Henle 44. Compared to endocrine system, the nervous system A) has a faster response, but signal does not last as long. B) has slower response and signal that does not last long. C) has a faster response with a longer‐lasting signal. D) has a slower response with a longer‐lasting signal. 45. Which of following hormones causes glucose release and a rise in concentration of sugar in blood? A) insulin C) glucagon B) calcitonin D) oxytocin 46. Which of the following statements regarding sexual reproduction is...
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- Fall '13