Human Anatomy (8th Edition) - Standalone book
8th Edition
ISBN: 9780321883322
Author: Frederic H. Martini, Robert B. Tallitsch
Publisher: PEARSON
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Chapter 2, Problem 11RFT
Summary Introduction
Introduction:
A cell consists of the organelles, the cytoplasm, and the cytosol, which are enclosed in a plasma membrane. The plasma membrane is the outer boundary. The outer and the inner surfaces of the membrane differ in the composition of lipid and protein.
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The fundamental bilayered structure of the plasma membrane is determined almost exclusively by (a) phospholipid molecules, (b) peripheral proteins, (c) cholesterol molecules, (d) integral proteins.
Which statements are consistent with the fluid-mosaic model of membranes? (a) All membrane proteins are bound to the interior of the membrane. (b) Both proteins and lipids undergo transverse (flip-flop) diffusion from the inside to the outside of the membrane. (c) Some proteins and lipids undergo lateral diffusion along the inner or outer surface of the membrane. (d) Carbohydrates are covalently bonded to the outside of the membrane. (e) The term mosaic refers to the arrangement of the lipids alone.
All of the following are passive membrane transport processes except: (a) diffusion. (b) facilitated diffusion. (c) vesicular transport. (d) osmosis.
Chapter 2 Solutions
Human Anatomy (8th Edition) - Standalone book
Ch. 2 - Level 1 Reviewing Facts and Terms Match each...Ch. 2 - Prob. 2RFTCh. 2 - Level 1 Reviewing Facts and Terms Match each...Ch. 2 - Level 1 Reviewing Facts and Terms
Match each...Ch. 2 - Prob. 5RFTCh. 2 - Prob. 6RFTCh. 2 - Level 1 Reviewing Facts and Terms Match each...Ch. 2 - Match each numbered item with the most closely...Ch. 2 - Prob. 9RFTCh. 2 - All of the following membrane transport mechanisms...
Ch. 2 - Prob. 11RFTCh. 2 - Compared to the intracellular fluid, the...Ch. 2 - 13. Label the following organelles on the diagram...Ch. 2 - Prob. 14RFTCh. 2 - Prob. 15RFTCh. 2 - 16. Three major functions of the endoplasmic...Ch. 2 - 17. A selectively permeable plasma membrane
(a)...Ch. 2 - Prob. 18RFTCh. 2 - Identify the advantages a cell has because its...Ch. 2 - 2. Identify the three basic concepts that make up...Ch. 2 - 3. Identify the three passive processes by which...Ch. 2 - Compare and contrast facilitated diffusion and...Ch. 2 - Prob. 5RCCh. 2 - Prob. 6RCCh. 2 - 7. Name the stages of mitosis shown in this...Ch. 2 - Identify the four general functions of the plasma...Ch. 2 - Tell why the skin of your hands gets swollen and...Ch. 2 - Prob. 2CTCh. 2 - Experimental evidence demonstrates that in the...
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- 1)What is the second type of lipid that plays a major role in the plasma membrane? This lipid does not have polar and nonpolar regions (its not amphiphilic) but plays a critical role in membrane permeability. A)Triglycerdies B) Steriod hormones c) cholesterol 2) In _______________, a single substrate/solute move from a high concentration area to a lower concentration are without the aid of any additional molecules. A) Diffusion B)Facilitated diffusion C) Cotransport 3)Channel proteins require a confirmational change in order to properly function. A) Hydrophilic B) ionic C) Polararrow_forwardThe proteins in the plasma membranes may function as (a) receptors and channels. (b) carriers and enzymes. (c) anchors and identifiers. (d) a, b, and c are correct.arrow_forward3)What is the second type of lipid that plays a major role in the plasma membrane? This lipid does not have polar and nonpolar regions (its not amphiphilic) but plays a critical role in membrane permeability. A)phospholipids b) steroid hormones c) Cholesterol 4)Which one of the following influences the rate at which diffusion can occur? Size of the concentration gradient Mass of the molecule Distance All of the above affect diffusion None of the above affect the diffusion ratearrow_forward
- Which of the following components of the plasma membrane will help increase fluidity of the memebrane? a) cholesterol b) channel proteins c) phospholipid d) glycoproarrow_forwardWhich of the following processes requires the cell to expend metabolic energy directly (e.g., from ATP)? (a) osmosis (b) facilitated diffusion (c) all forms of carrier-mediated transport (d) active transport (e) simple diffusionarrow_forwardThe distinctive properties of facilitated diffusion are: (a) Increase the speed of diffusion of substances (b) Transport of substances towards increasing concentration Additional energy consumption for transport (c) Transfer of substance involving carriers (d) Integration flux of substance and ion transport (e)arrow_forward
- Identify the false statement about lysosomes. (a) They have the same structure and function as peroxisomes. (b) They form by budding off the Golgi apparatus. (c) Lysosomal enzymes do not occur freely in the cytosol in healthy cells. (d) They are abundant in phagocytic cells.arrow_forwardProteins which are only on one side of the plasma membrane and may not interact with the phospholipids directly. The proteins are often involved in intracellular signialing. a) cholesterol b) peripheral protein c) integral proteins D) glycolipidarrow_forwardDiffusion is important in body fluids because this process tends to:(a) increase local concentration gradients. (b) eliminate local concentration gradients. (c) move substances against their concentration gradients. (d) create concentration gradients.arrow_forward
- Which statements are consistent with the known facts about membrane transport? (a) Active transport moves a substance from a region in which its concentration is lower to one in which its concentration is higher. (b) Transport does not involve any pores or channels in membranes. (c) Transport proteins may be involved in bringing substances into cells.arrow_forwardc) Figure 3 shows how materials are actively transported across plasma membrane. Extracellular Process X Process Y Figure 3 i) Give two (2) similarities between process X and Y. ii) State two (2) characteristics of a cell that carry out active transport. .... ...... ..... ... ..........arrow_forwardSelect the best answer or answers from the choices given: Membrane junctions that allow nutrients or ions to flow from cell to cell are (a) desmosomes, (b) gap junctions, (c) tight junctions, (d) all of these.arrow_forward
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