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 20RQ
Imagine a cell can perform exocytosis, but only minimal endocytosis. What would happen to the cell?
- The cell would secrete all its intracellular proteins
- The plasma membrane would increase in size over time
- The cell would stop expressing integral receptor proteins in its plasma membrane
- The cell would lyse.
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Imagine a cell can perform exocytosis, but only minimalendocytosis. What would happen to the cell?a. The cell would secrete all its intracellular proteins.b. The plasma membrane would increase in size overtime.c. The cell would stop expressing integral receptorproteins in its plasma membrane.d. The cell would lyse.
Magnesium ions are in higher concentration inside the cell. What process would the magnesium ions use to enter the cell? Hint: drawing a picture may help you.
A) receptor-mediated endocytosis
B) active transport
C) simple diffusion
D) osmosis
E) Facilitated diffusion
As a cell grows its plasma membrane expands. Does this involve endocytosis or exocytosis? ATP is not directly involved in the functioning of a co-transporter. Why, then, is co-transport considered active transport?
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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- The 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_forwardIn the fluid mosaic model: plasma membrane proteins orient their hydrophilic sides toward the internal bilayer. phospholipids often flip-flop between the inner and outer layers. the mosaic refers to proteins attached to the underlying cytoskeleton. the fluid refers to the phospholipid bilayer. the mosaic refers to the symmetry of the internal membrane proteins and sterols.arrow_forwardWhich plasma membrane component can be either found on its surface or embedded in the membrane structure? a. protein b. cholesterol c. carbohydrate d. phospholipidarrow_forward
- Why is it advantageous for the cell membrane to be fluid in nature?arrow_forwardThe 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_forwardCell membranes consist mainly of a _________. a. carbohydrate bilayer and proteins b. protein bilayer and phospholipids c. phospholipid bilayer and proteinsarrow_forward
- Assume a molecule must cross the plasma membrane into a cell. The molecule is very large. How will it be transported into the cell?arrow_forwardWhich of the following molecules would you expect to diffuse through the lipid bilayer of a plasma membrane most rapidly? Na+ An amino acid Starch Glucose O2arrow_forwardWhat is exocytosis? A. The process by which a cell engulfs a large particle or another cell, eating it B. The process by which a cell expels the contents of an internal vesicle to the extracellular fluid C. The process by which a cell takes in a small amount of extracellular fluid and its contents by the ballooning inward of the plasma membrane D. Pressure that a fluid exerts against a structure that contains itarrow_forward
- Osmosis is water movement across a semipermeable membrane. Which of the following is true about water movement across cell membranes? A. In a hypotonic solution, cells will swell. B. In an isotonic solution, cells will shrink. C. In a hypertonic solution, cells will stay the same. D. Cells can neither shrink nor swell because water cannot penetrate the plasma membrane.arrow_forwardFind the FALSE sentence. Select one: a. In osmosis, water diffuses across a selectively permeable membrane from the compartment with the lowest to the compartment with the highest solute concentration. b. Malignant tumors can give rise to metastases. c. Passive transport across the membrane requires ATP. d. The endoplasmic reticulum and the Golgi apparatus both collaborate to build the cell membrane.arrow_forwardwhich one of the following diffuses more readily through the lipid bilayer of a plasma membrane a. polar molecules b. non polar molecules c. ionized molecules d. waterarrow_forward
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