Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Phosphatidylcholine is the only major phospholipid in the plasma membrane.
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- True or False? The sodium ions did not diffuse across the cell membrane because there was a greater concentration of sodium ions inside the cell than on the outside.arrow_forwardRigor mortis (the stiffening of muscles fibers several hours after death) is directly due to the depletion of what energy source? This energy molecule is used to power a calcium pump that transports Ca2+ ions back into the endoplasmic reticulum where calcium ions are already at a high concentration.arrow_forwardThis graph shows the electrical charges of the cytosol at one spot along an axon or muscle cell. a) Even though the charges are the same at steps 3 and 6, explain the situation with the ions on either side of the membrane. I am not looking for a vocabulary term here, just a simple explanation in normal words. b) At step 6, this spot in the cell is not ready to conduct another action potential/impulse. What has to happen to get it ready again- and how is this done?arrow_forward
- How would you define the term "membrane potential." The ability of a cell to perform its specialized function. A voltage difference that exists across the outer and inner face of the plasma membrane. The possibility of a given cell activity being accomplished. Aaarrow_forwardPhospholipids are the only molecule type which make up lipid bilayers in plasma membranes True or Falsearrow_forwardWhen would a carrier protein be required in order to allow a solute to diffuse across a plasma membranearrow_forward
- would substances be able to pass through the plasma membrane if the phospholipi tails of the plasma membrane were oth satueated fatty acids? why or why not, explain?arrow_forwardThe cytoplasm of a certain cell is composed of a solution that is 98% water, 2% solutes. Consider the solution shown in the beaker in this picture: FOOE OOS Foor solution. [Select] Cytoplasm is 98% water, 2% solutes. The solution in the beaker would be considered when compared to [Select] The plasma membrane is impermeable to solutes. Beaker solution is 98% water, 2% solutes the cell. We would expect that the cell would [Select] if it was placed in the would account for whatever changes might occur to the volume of the cytoplasm of the cell when it is placed in the solution.arrow_forwardIn general, what is the relationship between membrane fluidity and membrane permeability?arrow_forward
- List 2 functions of peripheral membrane proteinarrow_forwardCholesterol is a membrane component that can modulate membrane fluidity. True O Falsearrow_forwardProvide examples and describe basic structure/function of plasma membrane components– Phospholipids (Which is charged, what is the functional significance? Are they preferentially located on cytosolic or extracellular lipid monolayer? What is the functional significance of plasma membrane asymmetry?)– Describe phosphatidylserine signaling– Cholesterol: how does it maintain optimal fluidity?– Glycolipids– Proteinsarrow_forward
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