ANATOMY APR+PHILS F/HUMAN ANATOMY(LL)
5th Edition
ISBN: 9781260412086
Author: McKinley
Publisher: MCG
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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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The plasma membrane is said to be a fluid-mosaic model because it contains
a. waxes suspended within a mosaic of phospholipids.b. a mosaic of proteins suspended within a phospholipid bilayer.c. a polysaccharide mosaic suspended within a protein bilayer.d. a mosaic of phospholipids suspended within a protein bilayer.
Which 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 temperature
Which of the following is incorrect regarding facilitated diffusion?a. It is a passive process.b. It allows the movement of molecules from areas of lowconcentration to areas of high concentration.c. It may use either channel or carrier proteins.d. It allows the rapid transport of glucose across the membrane.
Chapter 2 Solutions
ANATOMY APR+PHILS F/HUMAN ANATOMY(LL)
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_forwardWhen cellular transport through the plasma membrane must be provided with energy in form of ATP to power the transport process, what is this called? A. Selective permeability B. Passive transport C. Active transport D. Diffusionarrow_forwardWhich of the following statements is true of membrane proteins? a) They are suspended on the surface of the membrane. b) They are partly embedded in the bilayer c) They span across the bilayer and project from both sides d) Any of these are true, depending on the specific membrane protein.arrow_forward
- Which of the following statements about cellular membranes is/are FALSE? A. Only lipids move Within the membrane, while the proteins are anchored and immobile. B. Membranes are composed of lipids and proteins. C. Substances may be transported across membranes by active transport, facilitated transport or diffusion. D. Membrane proteins are classified as integral or peripheral, upon their functionarrow_forwardWhich of the following is not a function of the plasma membrane? (a) transports materials (b) helps structurally link cells (c) has receptors that relay signals (d) anchors the cell to the extracellular matrix (e) manufactures proteinsarrow_forwardThe plasma membrane isa. a carbohydrate layer that surrounds groups of cells to protect them.b. a double lipid layer with proteins inserted in it, which surrounds every cell individually.c. a thin sheet of structural proteins that encloses cytoplasm.d. composed of proteins that form a protective barrier.arrow_forward
- Which of the following is NOT a part of the endomembrane system? A. The Golgi apparatus B. Peroxisomes C. Lysosomes D. The exterior cell membranearrow_forwardWhich of the following can most easily pass through the phospholipid bilayer of the cell plasma membrane without the involvement of proteins? A. small non-polar molecules B. small polar molecules C. large non-polar molecules D. large polar moleculesarrow_forwardWhich of the below statements correctly describes the extracellular matrix? a)A layer that facilitates connections and communications with other cells in a tissue b)A gel like substance that resists compression c)All of the other answers are correct d)a complex mix of proteins and polysaccharides.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_forwardWhich of the following factors would tend to increasemembrane fluidity?(A) a greater proportion of unsaturated phospholipids(B) a greater proportion of saturated phospholipids(C) a lower temperature(D) a relatively high protein content in the membranearrow_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_forward
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