BIO188 Test 3 Practice

BIO188 Test 3 Practice - 1. Blood is which type of tissue:...

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1. Blood is which type of tissue: A) connective B) epithelial C) matrix D) muscle E) nervous 2. Which of the following IS NOT a neurotransmitter: A) acetylcholine B) phenylalanine C) dopamine D) serotonin E) histamine 3. The action potential: A) begins with the membrane's increased permeability to potassium B) returns to resting when the sodium channels are open C) can be triggered in very rapids succession, with no delay D) involveds voltage-gated channels in the membrane E) propagates only because chloride ions move through the membrane 4. What generallys maintains the electric charge gradient across the neuronal membrane: A) sodium-potassium pump B) action potential C) Resting Potential D) voltage-gated channels E) negative ion pump 5. Saltatory conduction results when: A) continuous propagation of nerve impulses speeds up. B) a nerve impules jumps from one neuron to another C) the threshold for an action potential is suddenly increased D) action potentials hop from node to node down the axon E) the direction of the action potential suddenly changes 6. Ion channels: A) are proteins that mediate ion transport B) may exist in both an open and closed state C) are present only in nerve cells D) play no role in establishing the resting membrane potential E) both A and B are correct 7. Trophic hormones: A) are produced by the cerebral cortex B) are produced by the anterior pituitary gland C) are produced by the posterior pituitary gland D) are produced by the hypothalamus
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E) both b and d 8. Which of the follo0wing is an energy-dependent transport process in cells: A) diffusion B) facilitated diffusion C) osmosis D) active transport E) passive transport 9. If the thickness of a permeable membrane increases 50% the net flow of molecules across the membrane: A) increases 50% B) decreases 50% C) increases 66% D) decreases 66% E) decreases 33% 10. Which of the following IS NOT an example of negative feedback: A) increase in blood glucose stimulates insulin secretion B) a drug user increases use to sustain a "high" C) a decrease in blood glucose level stimulates glucagon secretion D) A and C E) B and C 11. The action potential: A) travels along all axons at the same speed B) is slowed down if a nerve cell has myelin around it C) is blocked at the nodes of Ranvier D) causes a brief depolarization of membrane potential E) triggers a simultaneous change in potential along the entire axon 12. In nerve cells, which of the following carry electric charges across the cell membrane: A) electrons B) protons C) water D) ions E) proteins 13. A target tissue in the endocrine system is defined as: A) the tissue with the greatest amount of hormone flowing through it at any
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This note was uploaded on 10/25/2010 for the course BIO 188 taught by Professor Capco during the Spring '08 term at ASU.

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BIO188 Test 3 Practice - 1. Blood is which type of tissue:...

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