Campbell Essential Biology (7th Edition)
7th Edition
ISBN: 9780134765037
Author: Eric J. Simon, Jean L. Dickey, Jane B. Reece
Publisher: PEARSON
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Chapter 5, Problem 7SQ
Summary Introduction
Introduction:
The flow of material is regulated by the cell membrane. The plasma membrane consists of a bilayer of phospholipids with embedded proteins. The major function of these proteins is to regulate the transport of material in and out of the cell. The movement of the particles is in both directions, which is controlled by the semi-permeable characteristic of the plasma membrane.
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Students have asked these similar questions
Proteins like albumin in the blood maintain water inside the blood vessels using
A. Osmotic pressure
B. Active diffusion
C. Active transport
D. Diffusion
The diffusion of water across a selectively permeable membrane is called?
A. Active transport
B. Facilitated diffusion
C. Osmosis
D. Cell membrane
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.
Chapter 5 Solutions
Campbell Essential Biology (7th Edition)
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- A transport protein requires ATP to pump sodium ions across a membrane. This is a case of ______. a. passive transport b. active transport c. facilitated diffusion d. a and carrow_forwardActive transport must function continuously because_______. a. plasma membranes wear out b. cells must be in constant motion c. facilitated transport opposes active transport d. diffusion is constantly moving the solutes in the other directionarrow_forwardThe passive movement of a solute through a membrane protein down its concentration gradient is an example of _________. a. osmosis b. active transport c. endocytosis d. diffusionarrow_forward
- The tails of the phospholipids of the plasma membrane are composed of _____ and are _____? a. phosphate groups; hydrophobic b. fatty acid groups; hydrophilic c. phosphate groups; hydrophilic d. fatty acid groups; hydrophobicarrow_forwardDistinguish between the following pairs of terms: a. diffusion; osmosis b. passive transport; active transport c. endocytosis; exocytosisarrow_forwardApply the concept of diffusion to predict the movement of molecules.arrow_forward
- Which of the following processes requires protein carriers to move materials up their concentration gradient? ____ a. active transport ____ b. osmosis ____ c. endocytosis ____ d. facilitated diffusionarrow_forwardOsmosis is a special type of diffusion that ________. a. moves water from an area with a high solute concentration to one of lower solute concentration b. moves sugar from an area with a high solute concentration to a lower solute concentration c. moves water from an area with a low solute concentration to one of higher solute concentrationarrow_forwardWhich statement is NOT true of membrane transport • proteins? A. Their specificity depends on their three-dimensional structure. B. They are responsible in some cases for facilitated diffusion. C. They are responsible in some cases for active transport. D. They produce a chemical change in the molecules they are transporting.arrow_forward
- Imagine that you are stranded on a desert island. Given what you know of diffusion and osmosis write a short paragraph which explains why drinking sea water could be fatal (result in death).arrow_forwardBy which pathway do cells bring in extracellular fluid? a Pinocytosis b Phagocytosis c Receptor-mediated endocytosis d Osmosisarrow_forwardChoose the answer that best completes the following analogy: Diffusion is to _____ as endocytosis is to ______. A. filtration; phagocytosis B. osmosis; pinocytosis C. solutes; fluid D. gradient; chemical energyarrow_forward
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