What is Life? A Guide to Biology with Physiology
3rd Edition
ISBN: 9781464157745
Author: Jay Phelan
Publisher: W. H. Freeman
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Chapter 21, Problem 2MC
Summary Introduction
Introduction:
Many multicellular organisms do not need circulatory systems, since their bodies are not complex.
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How might an increase in the body size of the larval body reduce the toxic effects of elevated atmospheric oxygen on the insect? Mark all that apply
A. Number of molecules remaining inside cell or animal body
B. Diffusion distance
C. Permeability
D. Surface area to volume of the cell membrane or animal body
E. Concentration of diffusing molecule on outside of cell or animal body
F. Thickness of cell membrane or animal body
Which of these statements about facilitated diffusion is true?a. In facilitated diffusion, net movement is down the concentrationgradient.b. Facilitated diffusion requires the expenditure of energy.c. Facilitated diffusion does not require a carrier protein.d. Facilitated diffusion moves materials through ion pumps.e. Facilitated diffusion moves materials in vesicles.
Which of these statements about carrier-mediated facilitated diffusion is true? a. It uses cellular ATP. b. It is used for cellular uptake of blood glucose. c. It is a form of active transport. d. None of these are true.
Chapter 21 Solutions
What is Life? A Guide to Biology with Physiology
Ch. 21 - Prob. 1SACh. 21 - Prob. 2SACh. 21 - Prob. 3SACh. 21 - Prob. 4SACh. 21 - Prob. 5SACh. 21 - Prob. 6SACh. 21 - Prob. 7SACh. 21 - Prob. 8SACh. 21 - Prob. 9SACh. 21 - Prob. 10SA
Ch. 21 - Prob. 11SACh. 21 - Prob. 12SACh. 21 - Prob. 13SACh. 21 - Prob. 14SACh. 21 - Prob. 15SACh. 21 - Prob. 16SACh. 21 - Prob. 17SACh. 21 - Prob. 18SACh. 21 - Prob. 1MCCh. 21 - Prob. 2MCCh. 21 - Prob. 3MCCh. 21 - Prob. 4MCCh. 21 - Prob. 5MCCh. 21 - Prob. 6MCCh. 21 - Prob. 7MCCh. 21 - Prob. 8MCCh. 21 - Prob. 9MCCh. 21 - Prob. 10MCCh. 21 - Prob. 11MCCh. 21 - Prob. 12MCCh. 21 - Prob. 13MCCh. 21 - Prob. 14MCCh. 21 - Prob. 15MCCh. 21 - Prob. 16MCCh. 21 - Prob. 17MCCh. 21 - Prob. 18MC
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- The Na/K pump in epithelium cells that line the gut is an example of ______ transport and helps __ Select one: a. active, prevent the movement of Cl- outside the cell b. active, prevent the movement of Cl- inside the cell c. active, prevent the movement of Na+ outside the cell d. passive, prevent the movement of Cl- outside the cell e. passive, prevent the movement of Cl- inside the cellarrow_forwardProteins like albumin in the blood maintain water inside the blood vessels using A. Osmotic pressure B. Active diffusion C. Active transport D. Diffusionarrow_forward(30. While conducting research on Euglena, a researcher observed that the contractile vacuole ceased functioning yet the rest of the organism seemed healthy and active. Which of the following is MOST likely responsible for the cessation of contractile vacuole action? A. Moving the Euglena from a lighted to darkened environment. B. Moving the Euglena from a freshwater to a seawater environment. C. Moving the Euglena 1om a seawater to a freshwater environment. D. Lowering the pH of the medium from 7.0 to 6.5. E. Lowering the temperature of the medium from 20°C to 15°C.arrow_forward
- Facilitated transport differs from diffusion in that facilitated diffusiona. involves the passive use of a carrier protein.b. involves the active use of a carrier protein.c. moves a molecule from a low to a high concentration.d. involves the use of ATP molecules.arrow_forwardHere is a chloride cell in the gill epithelium of a fish. For reference, NKA = Na+/K+ ATPaseNKCC = Na+/K+/Cl- cotransporter. What type of fish would you expect to see this type of chloride cell? A. fresh water fish B. salt water fish C. eitherarrow_forwardSponges are full of holes, jellyfish are big open sacs, and flatworms are flat. How are these features important in facilitating the process of diffusion?arrow_forward
- Which of these statements about ion movement through the plasmamembrane is true?a. Movement of Na+ out of the cell requires energy (ATP).b. When Ca2+binds to proteins in ion channels, the diffusion of Na+into the cell is inhibited.c. Specific ion channels regulate the diffusion of Na+ through theplasma membrane.d. All of these are truearrow_forwardwhat is the protein component of the contractile ring that divides the cytoplasm of animal cells during cytokinesis a. tubulin b. actin c. microtubulin d. lamin e. chitinarrow_forwardIf a cell could not properly incorporate proteins into its membrane , which of the following functions would be lost? A Synaptic transmission of an action potential B. Diffusion of oxygen from the circulatory system to interstitial fuild. C. Removal of the waste product CO2 from the cell to the interstitial fluid. O D. B And Carrow_forward
- O e. They align and assort independently to form any of 16 different combinations Time left Which of the following correctly describes the movement which takes place when mucus is pushed upwards in the respiratory tract? O a. Undulating strokes by ciliated cells O b. Back-and-forth motion by flagellated cells O c. Snake-like motion flagellated cells O d. Snake-like motion by ciliated cells O e. Back-and-forth motion by ciliated cells The formation of the cleavage furrow in animal cells is through the action of the thinnest fiber of the cytoskeleton Select one:arrow_forwardWhich 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.arrow_forwardanatomyarrow_forward
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