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Biol 1720 Exam II SS'04

Biol 1720 Exam II SS'04 - Biology 1720 Exam II Summer 2004...

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Biology 1720 Name:_____________________________ Exam II, Summer 2004 Remember to read all of the possible answers for each question before choosing the BEST ANSWER. 1. The primary cation (+charge) in extracellular fluid is: a. calcium. b. sodium. c. chloride. d. bicarbonate. e. potassium. . 2. When water flows over the gills in the opposite direction of the flow of blood in the capillaries in the lamellae. The exchange of dissolved oxygen between the water and blood in this case is an example of: a. concurrent exchangemellae. b. countercurrent exchange. c. equilibrated exchange. d. saturated equilibrium. e. a stop/flow system. 3. Which of the following is NOT used as a neurotransmitter by mammals? a. acetylcholine b. GABA c. glycine d. glutamate e. All of the above are used as neurotransmitters in mammals. 4. The depolarization of cardiac cells/muscle in a mammalian heart begins at the: a. atrioventricular bundle. b. Purkinje fibers. c. left atrium. d. sinoatrial (SA) node. e. atrioventricular (AV) node. 5. The wave of muscle contraction spreads from the atria to the ventricles of a mammalian heart via the: a. increased heart rate. b. decreased heart rate. c. a fall in blood pH. d. a rise in blood pH. e. a high partial pressure for oxygen in the blood.
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6. The primary buffering capacity in blood is provided by: a. bicarbonate. b. hemoglobin. c. dissolved oxygen. d. the albumin proteins in the serum. e. carbonic anhydrase. 7. Fresh air is approximately ____% oxygen: a. 5 b. 10 c. 20 d. 50 e. 80 8. A neuron carries an impulse from the CNS to a gland in the body. This would be best described as an example of a/an: a. neuroglial axon. b. sensory neuron. c. motor neuron. d. association neuron. e. None of the above is a correct answer to the question. 9. An example of areceptor that measures blood pressure is a/an: a. SA node. b. systolic sensor. c. baroreceptor. d. NO receptor. e. hypoceptor. 10. Which of the following would reduce the affinity of hemoglobin for oxygen? a. Increased sodium ion concentrations in the red blood cell. b. Increased potassium ion concentrations in the red blood cell. c. Depolarization of the red cell plasma membrane. d. A drop in the cytoplasmic pH of the red blood cell. e. A drop in the oxygen concentration in the blood. . 11. A somatic motor neuron would most likely synapse with:
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Biol 1720 Exam II SS'04 - Biology 1720 Exam II Summer 2004...

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