Concepts of Biology
1st Edition
ISBN: 9781938168116
Author: Samantha Fowler, Rebecca Roush, James Wise
Publisher: OpenStax College
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Textbook Question
Chapter 3, Problem 13RQ
The principal force driving movement in diffusion is______.
a. temperature
b. particle size
c. concentration gradient
d. membrane surface area
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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.
As molecular weight increases.a). the rate of diffusion remain unchanged.b). the rate of diffusion decreases.c). the rate of diffusion increases.d). the rate of diffusion stops.
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 3 Solutions
Concepts of Biology
Ch. 3 - Figure 3.7 What structures does a plant cell have...Ch. 3 - Figure 3.13 Why does the cis face of the Golgi not...Ch. 3 - Figure 3.22 A doctor injects a patient with what...Ch. 3 - When viewing a specimen through a light...Ch. 3 - The ____________ is the basic unit of life. a....Ch. 3 - Which of these do all prokaryotes and eukaryotes...Ch. 3 - A typical prokaryotic cell ________ compared to a...Ch. 3 - Which of the following is found both in eukaryotic...Ch. 3 - Which of the following is not a component of the...Ch. 3 - Which plasma membrane component can be either...
Ch. 3 - The tails of the phospholipids of the plasma...Ch. 3 - Water moves via osmosis _______. a. throughout the...Ch. 3 - The principal force driving movement in diffusion...Ch. 3 - Active transport must function continuously...Ch. 3 - What are the advantages and disadvantages of...Ch. 3 - Describe the structures that are characteristic of...Ch. 3 - In the context of cell biology, what do we mean by...Ch. 3 - Why is it advantageous for the cell membrane to be...Ch. 3 - Why does osmosis occur?Ch. 3 - Where does the cell get energy for active...
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- Whether in a gas, a liquid, or a semisolid, diffusion always occurs a). at the same rate. b). from high to low solute concentration. c). faster at lower temperaturesd). from low to high solute concentration.arrow_forwardIn terms of their effect on the rate of diffusion, which of the following is the odd one out? a) decreasing the surface area of the membrane b) decreasing membrane permeability c) decreasing lipid solubility of the diffusing molecule d) decreasing the concentration gradient of the diffusing molecule e) decreasing the thickness of the membranearrow_forwardChoose answer of the following 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.arrow_forward
- An increase in temperature will cause an increase in diffusion in diffusion rate becausea. hot water changes to a solid, so diffusion is easier.b. the frequency and force of molecular collisions decreases.c. hot molecules get smaller and theseforce diffuse faster.d. the frequency and force of molecular collisions increases.arrow_forwardWhat we know about diffusion states that the concentration of ions inside and outside a cell should be thesame, but in a neuron, the concentrations of sodium and potassium ions are quite different. How does the cell go against the forces of diffusion?arrow_forwardTwo students are discussing the effect of concentration gradient on diffusion. Student A says, “The higher the concentration gradient, the slower the rate of diffusion.“ But student B thinks the opposite. Who is correct?arrow_forward
- Facilitated diffusion differs from active transport in thatfacilitated diffusiona. expends no ATP.b. moves molecules from an area of higher concentration toone of lower concentration.c. does not require a carrier protein for transport.d. moves molecules in vesicles across a semipermeablemembrane.arrow_forwardWhich of the following distinguishes osmosis from simple diffusion? a) a concentration gradient b) a solute c) a selectively permeable membrane d) water moleculesarrow_forwarda. What concept pertains to the movement of particles across the cell membrane? A. Diffusion B. Active transport C. Facilitated diffusion b. Which respiration which happened between the blood and body tissue? A. Internal respiration B. External Respiration C. Both a and barrow_forward
- Which 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_forwardWe get iodine in our diet but over 99% of it ends up in our thyroid gland with very little in the rest of the body. Could this occur by diffusion? Explain in some detail.arrow_forwardExplain in 2-3 sentencesDescription:Examples in the body: a. Diffusion b. Osmosis c. Facilitated Diffusionarrow_forward
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