LooseLeaf for Human Anatomy
5th Edition
ISBN: 9781259285271
Author: Michael McKinley Dr., Valerie O'Loughlin, Elizabeth Pennefather-O'Brien
Publisher: McGraw-Hill Education
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Chapter 2, Problem 2MC
Summary Introduction
Introduction:
The cell membrane is an example of both selective and semipermeable membrane. The membrane regulates the movement of the molecules across the cell membrane. To do so, the membrane has different methods such as the presence of ion channels, the presence of transporter molecules, and fusion of the molecules with the plasma membrane.
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Students have asked these similar questions
Which of the following is NOT a function of membrane proteins?
a.Regulate the passage of ions
b.Act as carrier molecules for various solutes
c.Act as anchors or stabilizers for the cell membrane
d.Storage of cellular nutrients
Which of the following is not a function of the extracellular matrix
Select one:
A. Prevents the loss of water when cells are placed in a hypertonic solution.
B. Assists in the movement of substances across the plasma membrane.
C. Has numerous functions that affect the shape and activities of the cell that produced it.
D. Takes place in reception of molecules
The process of “active transport" through a membrane may be described by
which of the following?
A. the movement of ions and small molecules away from regions where they
are in high concentration.
B. the use of energy from ATP to move ions and small molecules into regions
where they are in lower concentration.
C. the plasma membrane engulfs the substance and moves it through the
membrane.
D. the use of energy from ATP to move ions and small molecules against their
concentration gradient.
Chapter 2 Solutions
LooseLeaf for Human Anatomy
Ch. 2 - Describe an advantage of using TEM rather than LM...Ch. 2 - Prob. 2WYLCh. 2 - Prob. 3WYLCh. 2 - Prob. 4WYLCh. 2 - In general, what materials may cross a selectively...Ch. 2 - What is diffusion?Ch. 2 - Describe the process of osmosisCh. 2 - Discuss the similarities between facilitated...Ch. 2 - Describe the characteristics of the cytosol.Ch. 2 - Describe the functions of lysosomes, mitochondria,...
Ch. 2 - Contrast the fates of proteins synthesized on free...Ch. 2 - What is the function of cilia?Ch. 2 - What is the function of the nuclear envelope?Ch. 2 - What is the difference between chromatin and...Ch. 2 - Observation shows that most cells are suspended in...Ch. 2 - List the stages of mitosis in order of occurrence....Ch. 2 - Prob. 17WYLCh. 2 - Prob. 18WYLCh. 2 - Match each numbered item with the most closely...Ch. 2 - Prob. 1MCCh. 2 - Prob. 2MCCh. 2 - Facilitated diffusion differs from active...Ch. 2 - Which plasma membrane structures serve in cell...Ch. 2 - _____ increase the outer surface area of the...Ch. 2 - Prob. 6MCCh. 2 - Interphase of the cell cycle consists of the...Ch. 2 - Prob. 8MCCh. 2 - Prob. 9MCCh. 2 - Prob. 10MCCh. 2 - Describe three main regions common to all cells,...Ch. 2 - Prob. 2CRCh. 2 - Prob. 3CRCh. 2 - Prob. 4CRCh. 2 - Prob. 5CRCh. 2 - Prob. 6CRCh. 2 - Identify the three parts of the cytoskeleton, and...Ch. 2 - What are the basic components of the nucleus, and...Ch. 2 - Prob. 9CRCh. 2 - Identify the phases of mitosis, and briefly...Ch. 2 - Prob. 1DCRCh. 2 - Prob. 2DCR
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- Which plasma membrane component can be either found on its surface or embedded in the membrane structure? a. protein b. cholesterol c. carbohydrate d. phospholipidarrow_forwardAccording to the fluid-mosaic model of the plasma membrane, a.protein and phospholipids form a regular, repeating structure. b.the membrane is a rigid structure. c.phospholipids form a double layer, with the polar parts facing each other. d.proteins are free to move within a double layer of phospholipids.arrow_forwardMembrane proteins perform the following functions EXCEPT one. Which One? A. form the glycocalyx B. act as receptor proteins C. form pores to allow the passage of small solutes D. behave as enzymes.arrow_forward
- Which of the following statements regarding the selective permeability of the lipid bilayer is FALSE? A. the permeability of the lipid bilayer to different substances varies. B. The lipid bilayer component of the plasma membrane is highly permeable to nonvolatile molecules such as oxygen. C. The more hydrophobic or lipid soluble a substance is, the greater the lipid bilayers permeability to that substance. D. The lipid bilayer component of the plasma membrane is moderately permeable to ions and large, uncharged polar moleculesarrow_forwardWhich of the following best describes an integral membrane protein? A.A protein that has an extracellular domain, a membrane-spanning domain that spans the lipid bilayer of the plasma membrane, and an intracellular domain. B.A protein that peripherally associates with the membrane via ionic interactions another protein embedded in the membrane. C.A protein that is soluble in the cytoplasm. D.A protein that peripherally associates with the membrane via ionic interactions between polar charged amino acids and the polar head groups of the phospholipids in the membrane.arrow_forwardIndicate whether the following statements are true or false. If a statement is false, explain why it is false. a. All types of cells contain cell walls, but only some cell types possess plasma membranes. b. The distribution of specific lipids to the inner and outer leaflet is asymmetrical, or biased, in plasma membranes. C. Lateral diffusion is the movement of lipids from one layer of the membrane to the other. d. Fatty acids tails are used to embed integral, transmembrane proteins in the plasma membrane.arrow_forward
- which of the following statements is correct about the movement of water across a plasma membrane a. it cannot pass through any ion channels b. it moves through the membrane via mediated transport c. even though it a polar molecule, it moves readily through the nonpolar lipid bilayer d. artificial lipid membranes are impermeable to waterarrow_forwardMark the following statements about the plasma membrane as true or false. If a statement is false, correct it to make a true statement. a. _____ Integral membrane proteins generally span the width of the plasma membrane, whereas peripheral proteins are found on only one side of the membrane. b. _____ Cholesterol provides the plasma membrane with stability in the face of changing ion concentrations . c. _____ Membrane cholesterol is vitally important for cell-cell recognition. d. _____ Membrane proteins often function as channels or carriers. e. _____ The overall structure of the plasma membrane is a mosaic with the components locked tightly in placearrow_forwardThe following is true about lipif layer of plasma membrane EXCEPT: A. Back to back layers made up of phospolipids B. Contains membrane proteins that function to transport molecules C. Composed of phospolopids that have polar tail and nonpolar head D. Allows molecules to either pass directly through the layer or through the uee of channels and transport proteinsarrow_forward
- Help mearrow_forwardWhich of the following is Not a function of the plasma membrane proteins? A. Acting as enzymes B. Acting as channels C. Acting as carriers D. Stabilizing temperaturearrow_forwardWhich of the following describes the fluid mosaic model of the plasma membrane structure? a. The lipid bilayer is solid at body temperature, thus protecting the cell. b. The phospholipid bilayer is embedded with associated proteins, cholesterol and sugars and has a dynamic arrangement. c. The plasma membrane is composed of two layers of proteins embedded with lipids. d. Phospholipids consist of a polar head and a nonpolar tail made of three fatty acid chainsarrow_forward
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