Test 1_2011 - Test 1 You scored 82 out of 100 Question 1...

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Test 1 You scored 82 out of 100 Question 1 Your answer is CORRECT. Which of the following fluid compartment represents the fluid that immediately surrounds the cells? a) interstitial fluid b) intracellular fluid c) plasma Question 2 Your answer is CORRECT. If a concentration or electrical gradient is present for a given substance, the substance will always passively permeate the membrane. a) True b) False Question 3 Your answer is CORRECT. Select the correct statement about graded potentials: a) They may contribute to the development of an action potential. b) They may travel long distances. c) They are self-propagating. d) They have an all-or-none characteristic. e) They travel in one direction along the membrane. Question 4 Your answer is CORRECT. Which of the following statements regarding hormone signaling is true? a) Signaling through the hydrophilic hormone receptor results in de novo protein synthesis. b) The receptor of hydrophilic hormones can translocate to the nucleus and bind DNA to regulate transcription. c) When a hormone binds to a nuclear receptor the first molecule activated is a G- protein d) The activity that occurs as a result of a hormone binding to its receptor continues even after the hormone has uncoupled from its receptor. e) None of these Question 5 Your answer is CORRECT. A stimulus a) is the disturbance or change that sets the pathway in motion. b) is an electrical and/or chemical signal that travels to the effector. c) evaluates incoming signals and compares it with the setpoint.
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d) is the minimum stimulus that must be achieved to set the reflect response in motion. Question 6 Your answer is CORRECT. A given synapse may produce EPSPs at one time and IPSPs at another time. a) True b) False Question 7 Your answer is CORRECT. Saltatory conduction: a) occurs in unmyelinated nerve fibers. b) is slower than conduction by local current flow because the myelin acts as an insulator to slow the impulse down. c) involves the impulse jumping from one node of Ranvier to the adjacent node. d) refers to the action potential spreading from one Schwann cell to the adjacent Schwann cell. e) more than one of these answers. Question 8 Your answer is CORRECT. Which type of molecules are typically associated with the plasma membrane? a) Carbohydrates b) Lipids c) Proteins d) All of these e) None of these Question 9 Your answer is CORRECT. Both estrogen and progesterone are steroid hormones that target uterine cells. The response of the target cells to each of these two hormones is opposite. This information implies that a) the two hormones bind to different cell surface receptors. b) one hormone binds to a receptor on the cell membrane and the other to an intracellular receptor. c)
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This note was uploaded on 01/05/2012 for the course CHEM 3321 taught by Professor Bean during the Spring '11 term at American Jewish University.

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Test 1_2011 - Test 1 You scored 82 out of 100 Question 1...

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