Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 5, Problem 33CTQ
Why is it important that there are different types of proteins in plasma membranes for the transport of materials into and out of a cell?
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Proteins 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) glycolipid
Which 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.
3)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 rate
Chapter 5 Solutions
Biology 2e
Ch. 5 - Figure 5.12 A doctor injects a patient with what...Ch. 5 - Figure 5.16 Injecting a potassium solution into a...Ch. 5 - Figure 5.19 If the pH outside the cell decreases,...Ch. 5 - Which plasma membrane component can be either...Ch. 5 - Which characteristic of a phospholipid contributes...Ch. 5 - What is the primary function of carbohydrates...Ch. 5 - A scientist compares the plasma membrane...Ch. 5 - Water moves via osmosis. throughout the cytoplasm...Ch. 5 - The principal force driving movement in diffusion...Ch. 5 - What problem is faced by organisms that live in...
Ch. 5 - In which situation would passive transport not use...Ch. 5 - Active transport must function continuously...Ch. 5 - How does the sodium-potassium pump make the...Ch. 5 - What is the combination of an electrical gradient...Ch. 5 - What happens to the membrane of a vesicle after...Ch. 5 - Which transport mechanism can bring whole cells...Ch. 5 - In what important way does receptor-mediated...Ch. 5 - Many viruses enter host cells through receptor-...Ch. 5 - Which of the following organelles relies on...Ch. 5 - Imagine a cell can perform exocytosis, but only...Ch. 5 - Why is it advantageous for the cell membrane to be...Ch. 5 - Why do phospholipids rend to spontaneously orient...Ch. 5 - How can a cell use an extracellular peripheral...Ch. 5 - Discuss why the following affect the rate of...Ch. 5 - Why does water move through a membrane?Ch. 5 - Both of the regular intravenous solutions...Ch. 5 - Describe two ways that decreasing temperature...Ch. 5 - A cell develops a mutation in its potassium...Ch. 5 - Where does the cell get energy for active...Ch. 5 - How does the sodium-potassium pump contribute to...Ch. 5 - Glucose from digested food enters intestinal...Ch. 5 - The sodium/calcium exchanger (NCX) transports...Ch. 5 - Why is it important that there are different types...Ch. 5 - Why do ions have a difficult time getting through...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Why is it advantageous for the cell membrane to be fluid in nature?arrow_forwardWhy is it important that there are different types of proteins in plasma membranes for the transport of materials into and out of a cell? Why do ions have a difficult time getting through plasma membranes despite their small size?arrow_forwardWhat is unique about plasma membrane? Why is it advantageous for the plasma membrane to be fluid in nature? How does the sodium-potassium pump contribute to the net negative charge of the interior of the cell? In medicine, why is it important to administer only isotonic intravenous solutions to patients? Example of isotonic IV fluids are normal saline and lactated Ringer’s solution. Potassium is a necessary nutrient in order to maintain the function of our cells. What would occur to a person that is deficient in potassium?arrow_forward
- Which functional class of membrane proteins allows water and small ions to cross the plasma membrane?arrow_forwardWhich one of the following will have the least difficulty in crossing the plasma membrane? a) Na+ b) Cl- c) fatty acids d) all of thesearrow_forwardThe rigidity of the plasma membrane is an essential characteristic that allows for cells to survive and thrive in various environments. What are examples of conditions or molecules that can alter plasma membrane rigidity?arrow_forward
- What type of plasma membrane protein provides the means for moving materials across the plasma membrane? What are three subtypes?arrow_forwarda) Give the two main membrane proteins.b) State a function each of the mentioned protins. c) Explain why change in pH can affect the function of the proteins.arrow_forwardWhich of the following statements describes the function of plasma membranes? I. define boundaries of the cell and its organelles and act as permeability barriers II. sites for specific biological and chemical functions III. possess transport proteins that regulate the movement of substances into and out of the cell and its organelles IV. contain protein molecules that act as receptors to detect external signals V. provide mechanisms for cell-to-cell contact, adhesion, and communicationarrow_forward
- Which of the following describes the plasma membrane? 1) phospholipid bilayer surrounding the cell 2) a membrane composed of tiny shelves or cristae 3) single-layered membrane that surrounds the nucleus of the cell 4) double layer of protein enclosing the plasmaarrow_forwardWhat happens if plasma membrane fails to maintain optimal fluidity?arrow_forwardWhich of the following components of the plasma membrane will help increase fluidity of the memebrane? a) cholesterol b) channel proteins c) phospholipid d) glycoproarrow_forward
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