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QUESTION 14 (1) In action potential's all-or-none law, a sub-threshold depolarization won't trigger action potential, also bigger impulses was produced by stronger stimuli. (2) Osmosis is the movement of water through a semipermeable/selectively permeable membrane from a region of high solute concentration to a region of low solute concentration, and such movement requires the expenditure of energy. None of the choices are correct Only the first statement is correct Both statements are correct QUESTION 15 Action Potential (AP) as an impulse - propagation steps Arrange in order • arrives at its target cell with the same strength as at its initiation • impulse is propagated down the length of the cell ахоn once triggered, a succession of APs travels down the entire length of the neuron to target cell with no loss of intensity depolarization above threshold at adjacent sit causing sodium channels to open

QUESTION 14 (1) In action potential's all-or-none law, a sub-threshold depolarization won't trigger action potential, also bigger impulses was produced by stronger stimuli. (2) Osmosis is the movement of water through a semipermeable/selectively permeable membrane from a region of high solute concentration to a region of low solute concentration, and such movement requires the expenditure of energy. None of the choices are correct Only the first statement is correct Both statements are correct QUESTION 15 Action Potential (AP) as an impulse - propagation steps Arrange in order • arrives at its target cell with the same strength as at its initiation • impulse is propagated down the length of the cell ахоn once triggered, a succession of APs travels down the entire length of the neuron to target cell with no loss of intensity depolarization above threshold at adjacent sit causing sodium channels to open

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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QUESTION 14 (1) In action potential's all-or-none law, a sub-threshold depolarization won't trigger action potential, also bigger impulses was produced by stronger stimuli. (2) Osmosis is the movement of water through a semipermeable/selectively permeable membrane from a region of high solute concentration to a region of low solute concentration, and such movement requires the expenditure of energy. None of the choices are correct Only the first statement is correct Both statements are correct QUESTION 15 Action Potential (AP) as an impulse - propagation steps Arrange in order arrives at its target cell with the same strength as at its initiation • impulse is propagated down the length of the cell ахоn once triggered, a succession of APs travels down the entire length of the neuron to target cell with no loss of intensity • depolarization above threshold at adjacent sit causing sodium channels to open
Transcribed Image Text:QUESTION 14 (1) In action potential's all-or-none law, a sub-threshold depolarization won't trigger action potential, also bigger impulses was produced by stronger stimuli. (2) Osmosis is the movement of water through a semipermeable/selectively permeable membrane from a region of high solute concentration to a region of low solute concentration, and such movement requires the expenditure of energy. None of the choices are correct Only the first statement is correct Both statements are correct QUESTION 15 Action Potential (AP) as an impulse - propagation steps Arrange in order arrives at its target cell with the same strength as at its initiation • impulse is propagated down the length of the cell ахоn once triggered, a succession of APs travels down the entire length of the neuron to target cell with no loss of intensity • depolarization above threshold at adjacent sit causing sodium channels to open
QUESTION 16 1) The end product of glycolysis in the cytoplasm is pyruvate. Under aerobic conditions, it makes its way into the matrix of the mitochondrion where the reactions of the Krebs Cycle take place. 2) Krebs Cycle as a source of chemical intermediates and metabolites, can be used to synthesize (or further metabolize) carbohydrates, amino acids and lipids. Only the second statement is correct Neither statements are correct Both statements are correct QUESTION 18 Kreb's Cycle Steps: 1) The Krebs cycle begins with the combination of the acetyl group of acetyl-CoA from the Krebs cycle preparation with the four-carbon compound oxaloacetate to form the six-carbon citric acid compound. 2) Then the citrate is oxidized along the cycle by different reactions catalyzed by enzymes producing several intermediate molecules. During the cycle, 2 additional CO2 molecules, 2 ATP, 3 NADH, and 1 FADH2 molecule are formed per pyruvate molecule. 3) In the end of the cycle, oxaloacetate is regenerated to return as an acetyl acceptor to re-start the cycle. Only one choice is correct in manner All three choices are correct in manner Two choices are in correct manner
Transcribed Image Text:QUESTION 16 1) The end product of glycolysis in the cytoplasm is pyruvate. Under aerobic conditions, it makes its way into the matrix of the mitochondrion where the reactions of the Krebs Cycle take place. 2) Krebs Cycle as a source of chemical intermediates and metabolites, can be used to synthesize (or further metabolize) carbohydrates, amino acids and lipids. Only the second statement is correct Neither statements are correct Both statements are correct QUESTION 18 Kreb's Cycle Steps: 1) The Krebs cycle begins with the combination of the acetyl group of acetyl-CoA from the Krebs cycle preparation with the four-carbon compound oxaloacetate to form the six-carbon citric acid compound. 2) Then the citrate is oxidized along the cycle by different reactions catalyzed by enzymes producing several intermediate molecules. During the cycle, 2 additional CO2 molecules, 2 ATP, 3 NADH, and 1 FADH2 molecule are formed per pyruvate molecule. 3) In the end of the cycle, oxaloacetate is regenerated to return as an acetyl acceptor to re-start the cycle. Only one choice is correct in manner All three choices are correct in manner Two choices are in correct manner
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