Which of these REQUIRES active transport in order to cross the plasma membrane? A. a sodium ion moving AGAINST the concentration gradient B. a hydrogen molecule moving WITH the concentration gradient C. an oxygen molecule moving WITH the concentration gradient D. a carbon dioxide molecule moving WITH the concentration gradient O Chrome Sign-in again

Which of these REQUIRES active transport in order to cross the plasma membrane? A. a sodium ion moving AGAINST the concentration gradient B. a hydrogen molecule moving WITH the concentration gradient C. an oxygen molecule moving WITH the concentration gradient D. a carbon dioxide molecule moving WITH the concentration gradient O Chrome Sign-in again

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter7: Energy And Metabolism

Section: Chapter Questions

Problem 4TYU: Test Your Understanding 4. Diffusion is an (a) endergonic process because free energy increases (b)...

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Test Your Understanding 4. Diffusion is an (a) endergonic process because free energy increases (b) endergonic process because free energy decreases (c) exergonic process because entropy increases (d) exergonic process because entropy decreases (e) more than one of the preceding options are true
Whether in a gas, a liquid, or a semisolid, diffusion always occurs a). at the same rate. b). from high to low solute concentration. c). faster at lower temperaturesd). from low to high solute concentration.
Oxygen and carbon dioxide are exchanged in the lungs and through all cell membranes diffusion down gradients of a. concentration b. tempertaure c. partial pressure d. ionic potential e. osmolarity
A. Assumed that the primary contributor to the absorbance of the samplewas due to the hemoglobins. Calculate how much red light the water in the sample absorbed.Explain whether or not ignoring water was a reasonable assumption. (use image down below to solve) B. There are several membrane-bound organelles in cells (e.g. nuclei, mitochondria,endoplasmic reticulum) that can also have ion channels in their membranes. Sketch anelectrical circuit model of a cell that expresses sodium, calcium, and chloride ion channels in itscellular membrane and calcium and chloride ion channels in its nuclear envelope membrane.
An increase in temperature will cause an increase in diffusion in diffusion rate becausea. hot water changes to a solid, so diffusion is easier.b. the frequency and force of molecular collisions decreases.c. hot molecules get smaller and theseforce diffuse faster.d. the frequency and force of molecular collisions increases.
This is a diffusion topic: During the time the simulation ran, did the concentration of either the oxygen molecules or the carbon dioxide molecules ever reach a state of equilibrium inside and outside of the cell? Why or why not? If equilibrium was reached, how long did it last? Explain why. The picture where the levels are not leveled was toward the beginning of the 30 seconds. The picture where the levels are even was towards the end of the 30 seconds.
A mitochondrion 1 μm long can travel the 1 meterlength of the axon from the spinal cord to the big toe in aday. The Olympic men’s freestyle swimming record for 200meters is 1.75 minutes. In terms of body lengths per day,who is moving faster: the mitochondrion or the Olympicrecord holder? (Assume that the swimmer is 2 meters tall.)
Describe the process of active transport as carried out by ion pumps. Your answer must include a discussion of all concentration gradients (ΔC), whether molecules are moving down and/or against ΔC, and the energy (ATP) requirements for active transport. Explain why energy is required or not required. Lastly, name a known ion pump
The cell membranes of mammalian red blood cells are permeableto urea. If red blood cells are dropped into a solution of urea thatis identical in osmotic pressure (isosmotic) to the cytoplasm ofthe cells, although the cells do not swell and burst as quickly aswhen they are dropped simply into pure water, they eventuallyswell and burst. Explain. Also discuss how you would designa solution into which red cells could be placed without everswelling. (Hint: Think about whether urea will stay on theoutside of the cells and the implications for osmotic pressures.)
which surface to volume ratio woud be the most efficient for transmembrane transport of substance in cells
Among the membrane transporters, the channels require energy and therefore are involved in active transport. * D. Disagree, because channels are not proteins and therefore are not involved in active tranport. A. Agree, because channels are associated with H+-ATPase. B. Disagree, because the pumps are the ones involved in active transport. C. Agree, because channels are proteins involved in active transport.
Which of the following statements is a lie? Select one: a.Winemaking tanks that ferment grape juice into wine need to have pressure-release valves. b.Mammalian red blood cells undergo lactic acid fermentation. c.Large quantities of alcohol are toxic to humans, but not to the yeasts that ferment the alcohol. Which of the following statements is a lie? Select one: a.The formation of water aids in establishing the ion gradient between the inner matrix and intermembrane space. b.Every protein complex in the electron transport chain is involved in the direct pumping of H+ in the intermembrane space. c.There is an existing electrochemical gradient between the intermembrane space and the inner mitochondrial matrix.