A critical feature of the plasma membrane is that it is selectively permeable. This allows the plasma membrane to regulate transport across cellular boundaries--a function essential to any cell's existence. How does phospholipid structure prevent certain molecules from crossing the plasma membrane freely?Drag the labels to fill in the table.can crosseasilyhave difficultycrossing thehydrophobicparttransportproteinrequired tocrossefficientlyReset Helpno transportproteinrequiredhydrophilichydrophobicType of moleculeNonpolar moleculesHydrophobic orAble to crossTransport proteinhydrophilic?lipid bilayer?required?(a)b©(examples: hydrocarbons, O2, CO₂)Group 1Group 3Group 2de(f)Polar molecules(examples: water, sugars)Group 1Group 3Group 29Ionsh(examples: Na+, K+, Ca 2+, CI")Group 1Group 3Group 2

Selective Permeability of the Plasma MembraneThe plasma membrane's selective permeability is a…

Answered: A critical feature of the plasma…

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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which of the following changes in the plasma membrane of a salmon is most likely to occur as it migrates to a much colder region of the Pacific Ocean? HInt: the fluidity of the salmon's plasma membranes must remain relatively constant during its migration. The percentage of integral membrane proteins in the plasma membrane would increase The percentage of unsaturated fatty acid tails in plasma membrane phospholipids would increase The percentage of unsaturated fatty acid tails in plasma membrane phospholipids would decrease The percentage of peripheral membrane proteins in the plasma membrane would increase
Which transport mechanism would allow a solute to move from its area of low concentration to its area of high concentration, another words against its concentration gradient? secondary active transport osmosis channel mediated facilitated diffusion carrier mediated facilitated diffusion simple diffusion Aa JO stv A К Pro
Which of the following is a characteristic of facilitated diffusion (passive transport) of a molecule across a membrane? OOO The rate of transport is saturable. It is highly specific for the molecule being transported. All of the answers are correct. Its rate is higher than that of simple diffusion of the molecule. The direction of transport is determined by concentration and/or electrochemical gradients.
The plasma membrane has a hydrophobic interior due to the two present in each phospholipid found in the phospholipid bilayer of the cell membrane. The plasma membrane allows some molecules to cross but not all. Therefore, the plasma membrane is said to be Molecules that are nonpolar and hydrophobic will cross the membrane with ease by Does this process require energy? When molecules move across the plasma membrane by passive transport, they will move down or with the_ from an area of concentration to an area of. concentration. Polar, hydrophilic molecules and charged ions will move across the plasma membrane by the process of_ This does not require energy, but it does require a A special case of diffusion is known as which is the movement of water across the plasma membrane. If a cell is placed into a solution that is hypertonic compared to the inside of the cell, the cell would If a cell is placed into a hypotonic solution compared to the inside of the cell, the cell water. would…
Fill in the blanks with the following words: diffusion, endocytosis, solute pump, osmosis. The type of active transport in which sodium and potassium are pumped across a membrane using ATP is called a This passive process is where water moves in and out of a cell The type of passive process in which molecules move across the plasma membrane down a concentration gradient is called This process is where the cell engulfs extracellular substances by phagocytosis or pinocytosis
Peripheral membrane proteins O may noncovalently interact with phospholipid heads O contain many hydrophobic amino acid residues if found on the cytosolic leaflet but contain hydrophilic residues if found on the extracellular leaflet O contain only alpha helical membrane spanning domains O have covalently attached lipid or fatty acid anchors All of the other are true
What type of membrane protein is shown in the figure below? HIN NH Cysteine-rich domain Protein tyrosine kinase domain COO "Ooc O Receptor protein O Transport protein Structural protein O Channel protein
Which is the definition of 'retrograde' with respect to membrane trafficking? movement from the endosome to the lysosome movement from the ER to the Golgi to either the plasma membrane or the endosome/lysosome movement from the cytoplasm to the nucleus movement from the Golgi to the ER
Which of the following are features of facilitated diffusion? There may be more than one correct answer, select all that apply. Requires energy Movement assisted by proteins Can include passive diffusion Depends on ATP hydrolysis Can include ion transport down its concentration gradient in a cell (high to low concentration)
Oxygen gas (O2) is a small nonpolar molecule. What is the transport mechanism for oxygen to cross the plasma membrane? Group of answer choices diffusion facilitated diffusion osmosis active transport endocytosis
extracellular concentration time extracellular concentration While studying the rate of transport of a molecule into muscle cells, the above graphs were obtained. These graphs are consistent with which of the following transport mechanisms? Select all that apply. Active transport Facilitated Diffusion Transport via specific membrane proteins Simple Diffusion intracellular concentration transport rate
One of the curves in this graph describes nonmediated diffusion, and the other describes facilitated transport. Which is which? Explain your choices.

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