front 1 Examine the digestive system structures in the figure above. The agent(s) that help emulsify fats are produced in location. | back 1 9 — bile is formed in the liver |
front 2 The most enzymatic hydrolysis of macromolecules occurs at location(s) | back 2 4 only. — small intestine |
front 3 Most of the digestion of fats occurs in location(s) | back 3 4 only. — small intestine |
front 4 If you were to jog 1 km a few hours after lunch, which stored fuel would you probably tap? | back 4 muscle and liver glycogen |
front 5 Blood returning to the mammalian heart in a pulmonary vein drains first into the | back 5 left atrium |
front 6 When you hold your breath, which of the following blood gas changes first leads to the urge to breathe? | back 6 rising CO₂ |
front 7 If a molecule of CO₂ released into the blood in your left toe is exhaled from your nose, it must pass through all of the following except | back 7 the pulmonary vein |
front 8 Which statement best describes the difference in responses of effector B cells (plasma cells) and cytotoxic T cells? | back 8 B cells secrete antibodies against a pathogen; cytotoxic T cells kill pathogen-infected host cells. |
front 9 Which of the following statements is not true? | back 9 A lymphocyte has receptors for multiple different antigens. |
front 10 Peaks of LH and FSH production occur during | back 10 the period just before ovulation. |
front 11 Homeostasis typically relies on negative feedback because positive feedback | back 11 drives processes to completion rather than to a balance point |
front 12 Which of the following organs is incorrectly paired with its function? | back 12 large intestine - bile production |
front 13 Which of the following is true of innate behaviors? | back 13 Innate behaviors are expressed in most individuals in a population across a wide range of environmental conditions. |
front 14 Which of the following is not required for a behavioral trait to evolve by natural selection? | back 14 In each individual, the form of the behavior is determined entirely by genes. |
front 15 During the contraction of a vertebrate skeletal muscle fiber, calcium ions | back 15 bind with troponin, changing its shape so that the myosin-binding sites on actin are exposed. |
front 16 Myosin filaments without actin overlap are in which section of the figure? | back 16 D - 4 |
front 17 Z-line | back 17 C - 3 |
front 18 Where are neurotransmitter receptors located? | back 18 the postsynaptic membrane |
front 19 Why are action potentials usually conducted in one direction? | back 19 The brief refractory period prevents reopening of voltage-gated Na+ channels. |