magine that a cell has a plasma membrane made ONLY of phospholipids and contains no proteins. Classify the molecules listed below according to whether or not they are likely to diffuse across the plasma membrane. Fatty acids Rapid Diffusion Across the Plasma Membrane Slow/No Diffusion Across the Plasma Membrane Water Oxygen Glucose Ca2 Steroid hormones

magine that a cell has a plasma membrane made ONLY of phospholipids and contains no proteins. Classify the molecules listed below according to whether or not they are likely to diffuse across the plasma membrane. Fatty acids Rapid Diffusion Across the Plasma Membrane Slow/No Diffusion Across the Plasma Membrane Water Oxygen Glucose Ca2 Steroid hormones

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter3: The Plasma Membrane And Membrane Potential

Section: Chapter Questions

Problem 5RE: Using the answer code on the right, indicate which membrane component is responsible for the...

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Using the answer code on the right, indicate which membrane component is responsible for the function in question: 1. channel formation____________________________________ (a) lipid bilayer 2. barrier to passage of water- __________________ (b) proteins soluble substances ____________________________________ (c) carbohydrates 3. receptor sites 4. membrane fluidity 5. recognition of self 6. membrane-bound enzymes 7. structural boundary 8. carriers
Provide 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– Proteins
Describe what gap junction are, emphasizing on how they are different two other cellular points of contact, their protein components and cellular function. Describe the three main sources of membrane fluidity. Describe in detail what proteoglycans are, including their hygroscopicity and biological roles.
The Table below shows the names of proteins whose functions are regulated through the binding of their ligands. Complete this Table by filling in the correct ligands for each of the proteins, the corresponding K, value, the affinity of this protein for its ligand and the source where the protein is found. Example Protein Avidin 1 Insulin receptor 2 Anti-HIV immunoglobulin 3 Nickel binding protein 4 Myoglobin 5 Myosin 6 Acetyl-CoA carboxylase 7 Cannabinoid receptor 1 (CB1) 8 Guanylyl cyclase Ligand Biotin Kd (M) 1 x 10-15 Affinity high Source/Organism Egg white
Match the transport process to the correct description or example. Primary Active Transport is: Group of answer choices transport of glucose out of cell, with its concentration gradient transport of sodium out of a neuron using the sodium potassium pump breaking of a covalent bond to create new molecules transport of large macromolecules into a cell transport of signal molecules out of an endocrine cell transport of a steroid hormone into a cell transport of glucose into a cell, against its concentration gradient import of an entire bacterium into a white blood cell
Eukaryotic membrane fluidity can be decreased by which of the following mechanisms? decreasing the number of fatty acids attached to glycerol in membrane lipids increasing the number of carbons in the fatty acids of membrane lipids increasing the degree of unsaturation in the fatty acids of membrane lipids decreasing the number of membraned organelles in the eukaryotic cell increasing the number of branched-chain fatty acids of membrane lipids
Membrane synthesis in the cell involves the movement of specific of phospholipids to the cytosolic face or non-cytosolic face (also known as extracellular face) of the membrane to achieve their mature distribution. Which enzyme non-selectively moves phospholipids between the two faces of the lipid bilayer? convertases flippases phospholipases scramblases floppases
Answer the following question based on the structure of the molecule below. NH HO-P-o он он NH2 OH OH ÓH OH Molecule X is a analog of which is likely water and would permeate the plasma membrane. OA, nonhydrolyzeable; GTP; insoluble; readily B. nonhydrolyzeable; ATP; insoluble; readily c. nonhydrolyzeable; ATP; soluble; readily D. nonhydrolyzeable; GTP; soluble; not E. nonhydrolyzeable; GTP; soluble; readily
Which of the following fatty acids, if incorporated into a typical eukaryotic membrane phospholipid, would be the most likely to decrease that membrane’s fluidity? linolenic acid, with 18 carbons and three carbon-to-carbon double bonds linoleic acid, with 18 carbons and two carbon-to-carbon double bonds stearic acid, with 18 carbons and no carbon-to-carbon double bonds oleic acid, with 18 carbons and one carbon-to-carbon double bond all of the above molecules are saturated, and equally likely to decrease membrane fluidity
Which of the following fatty acids, if incorporated into a typical eukaryotic membrane phospholipid, would be the most likely to increase that membrane’s fluidity? linolenic acid, with 18 carbons and three carbon-to-carbon double bonds linoleic acid, with 18 carbons and two carbon-to-carbon double bonds oleic acid, with 18 carbons and one carbon-to-carbon double bond stearic acid, with 18 carbons and no carbon-to-carbon double bonds all of the above molecules are unsaturated, and equally likely to increase membrane fluidity
In skeletal muscle glucose uptake is by the facilitated diffusion A transporter with is found intracellularly, but localizes to the cell surface upon stimulation by GLUT4 In the liver glucose uptake is by the transporter which move glucose by insulin insulin. A A/ Use the word bank below to fill in the blanks. Selected the best answer and copy exactly to facilitate electronic grading. Word Bank: calcium, epinephrine, facilitated diffusion, glucagon, GLUT1, GLUT2, GLUT4, GLUT5, insulin, primary active transport, secondary active transport, SGLT, simple diffusion
After previewing the attached figure, choose the correct answer(s) bellow: * Glucose. Extracellular space Glucose transporter (state 1) Cell membrane Cytosol Glucose Extracellular space transporter (state 2) Cytosol Hexokinases irreversibly catalyze the phosphorylation of intracellular glucose to glucose 6-P, thereby trapping it Inside the cell because no cell membrane transporter exists for phosphorylated sugars. The GLUT abundant in muscle and adipose tissue is the Insulin-dependent GLUT-4 . Glucokinase has a high Km (it functions only when glucose concentration is high), a high Vmax (it functions efficiently when glucose concentration is high), and is not directly inhibited by glucose 6-P. Glucose transport hy GLITS is down a