Bio 1720 Exam2

Bio 1720 Exam2 - Name:_ Signature:_ BIOL 1720 Summer 2001...

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Name:________________________________ SS#:_________________________ Signature:_____________________________ BIOL 1720 Summer 2001 Exam II 1. Blood circulating in a fish that has just left the gills: a. flows back to the atrium. b. returns to the sinus venosus and then out to systemic capillary beds. c. flows to the cornus arteriosus. d. flows through vessels directly to systemic capillary beds. 2. The rising phase of an action potential is initiated when the: a. sodium channels open. b. potassium channels open. c. calcium channels open. d. sodium channels close. e. sodium and potassium channels both open. 3. Cutaneous respiration is common and important in: a. amphibians. b. reptiles except crocodiles. c. crocodiles. d. mammals. e. birds. 4. Gray matter in nervous tissue consists of: a. cell bodies. b. axons c. myelin d. dendrites e. corpus callosum 5. The human heart beat originates from the a. right atrium. b. left atrium. c. sinoatrial node (SA node). d. atrioventricular node. e. diastole. 6. During the cardiac cycle, the period during which the ventricles contract is called: a. mitral. b. the atriaoventricular period. c. diastole. d. systole. e. the superior period.
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7. The simplest reflexes, such as the knee jerk reflex, involve: a. only one neuron. b. two neurons. c. three neurons, including an interneuron. d. four neurons, including two sensory neurons and an interneuron. e. only one receptor cell and a neuron. 8. The major characteristics of the mammalian nervous system are first seen in (from an evolutionary standpoint) in: a. cnidarians. b. flat worms. c. insects. d. amphibians. e. reptiles. 9. Blood pressure sensors (baroreceptors) are found: a. in the hypothalamus of the brain. b. on the carotid arteries. c. on the aorta. d. All of the above answers are correct. e. Only two of answers “a” through “c” are correct (one is incorrect). 10. The hormone which causes blood vessels to relax/dilate is: a. NO. b. ADH. c. atrial matriuretic hormone. d. aldosterone. e. acetyl choline. 11. An example of an amino acid which also functions as a neurotransmitter in the CNS is: a. lysine. b. arginine. c. tyrosine. d.
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Bio 1720 Exam2 - Name:_ Signature:_ BIOL 1720 Summer 2001...

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