E echinoderms have bilateral symmetry a coelomate and

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(E) Echinoderms have bilateral symmetry, a coelomate, and are protostomes 76. If the temperature was suddenly decreased in an environment, the organism most likely to be affected by this change would be a(n) (A) human (D) amphibian (B) bird (E) cow (C) whale 77. The optimum pH and body site for pepsin activity is (A) 7, oral cavity (D) 11, stomach (B) 8, oral cavity (E) 5, small intestine (C) 2, stomach 78. Base your answer on the diagram below, which shows the cross-section of an organism. The section labeled A is (A) a root hair (D) villi (B) cilia (E) setae (C) flagella 79. Base your answer to the following question on the diagram below. This structure can be found in which of the following organisms? (A) Cartilagenous fish (D) Bony fish (B) Frog (E) Salamander (C) Bat 80. Which of the following sequences describes the passage of an action potential in the neuron? (A) axon, cell body, dendrite, synaptic cleft (B) synaptic cleft, axon, dendrite, cell body (C) dendrite, synaptic cleft, cell body, axon (D) dendrite, cell body, axon, synaptic cleft (E) synaptic cleft, axon, cell body, dendrite AP Biology Sample Exam Page 7
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81. Base your answer on the diagram below. Acetylcholine is released from the synaptic vessicles located at this site. (A) A (D) D (B) B (E) E (C) C 82. X + Y - XY + energy Which of the following best characterizes the reaction represented above? (A) Exergonic reaction (D) Catabolism (B) Endergonic reaction (E) Oxidation - reduction (C) Hydrolysis 83. Which of the following structure and function is incorrectly paired? (A) sclera - provides support and protection for inner contents of the eye (B) pupil - allows light to enter the eye (C) cones - detect color (D) rods - detect light and dark (E) iris - focuses the image 84. The rate of H 2 O reabsorption from the collecting duct of the nephron is most highly influenced by which of the following? (A) Antidiuretic hormone (B) Adrenocorticotropic hormone (C) Growth hormone (D) Glucagon (E) Parathormone 85. Production and storage of bile occurs in the (A) liver; stomach (D) pancreas; gall bladder (B) liver; gall bladder (E) colon; small intestine (C) stomach; colon 86. Hemoglobin's affinity for oxygen would be lowered as a result of I. high carbon dioxide levels II. high nitrogen levels III. high hydrogen ion levels (A) I (D) I and II (B) II (E) I and III (C) III 87. Which bands and/or zones in a sarcomere shorten when a skeletal muscle contracts? (A) H band and I band (D) A band and Z zone (B) A band (E) I band and Z zone (C) H band, I band and A band 88. A urinalysis of an individual with diabetes mellitus most likely will report which of the following in the urine? (A) Glucose (D) Lymphocytes (B) Salt (E) Protein (C) Erythrocytes 89. Cardiac muscle is similar to smooth muscle in all of the following ways EXCEPT (A) location of muscle in the body (B) number of nuclei per cell (C) mechanism of control (D) texture and shape (E) both A and D 90. During which stage in embryonic development do cells differentiate into three germ layers?
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