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 32CTQ
The sodium/calcium exchanger (NCX) transports sodium into and calcium out of cardiac muscle cells. Describe why this transporter is classified as secondary active transport.
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"Transport by transporters can be either active or passive, whereas transport by channels is always passive" is true or false.
the sodium channel exchanger NCX transports sodium into and calcium out of cardiac muscle cells. Describe why this itransporter is classified as secondary active transport?
"Transporters saturate at high concentrations of the transported molecule when all their binding sites are occupied; channels, on the other hand, do not bind the ions they transport and thus the flux of ions through a channel does not saturate." is true or false.
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
- List the means of unassisted membrane transport.arrow_forwardDescribe the contribution of each of the following to establishing and maintaining membrane potential: (a) the Na+K+ pump, (b) passive movement of K+ across the membrane, (c) passive movement of Na+ across the membrane, and (d) the large intracellular anions.arrow_forwardWhy "Transporter are not very selective, and allow solutes to enter or leave the cell through channels or carriers composed of proteins" is true"?arrow_forward
- Which of the following is incorrect about membrane transport systems? a. Glucose transport in red blood cells is a uniport system b. The Na+/K+ ATPase is an antiport system c. The H+/K+ ATPase is an active transport system d. The chloride-bicarbonate exchanger in erythrocytes is a uniport systemarrow_forwarda skeletal muscle cell has depleted its stores of ATP how will the altered transport properties of the NKA transporter affect cytosolic calcium concentrations (increase, decrease, no change) relative to normal? Why?arrow_forwardTrue or False: Passive-mediated transport proteins lower the delta G of transport to create the movement of molecules or ions.arrow_forward
- If a skeletal muscle has depleted its stores of ATP how will the altered transport properties of the following transporters affect cytosolic ion concentrations (increase, decrease, no change) relative to normal? Skeletal Muscle Cell With Depleted ATP Stores Ion transporter Cytosolic K+ Cytosolic Na+ Cytosolic Ca2+ NKA NCX SERCAarrow_forwardsummarizes several of the many types of transporters in the cells of the human body. List a few ways in which the variety of transport mechanisms shown here relate to the general principle of physiology that homeostasis is essential for health and survival.arrow_forwardCompare and contrast simple transporters, thephosphotransferase system, and ABC transporters in terms of(1) energy source, (2) chemical alterations of the solute duringtransport, and (3) number of proteins requiredarrow_forward
- In all human cells, there is a higher concentration of calcium ions outside of thecell than on the inside of the cell. Calcium pumps are primary active transportproteins that help to maintain this imbalance. Describe how calcium pumpswork, including the direction of ion transport and the source of energy of thecalcium pumps.arrow_forwardDescribe the effect of a blocker of cellular ATP production (e.g. anoxia plus sodium fluoride) on transport rate of ZZZ if transport occurs by active transport, simple diffusion and protein-mediated diffusionarrow_forwardIf a solute to be transported across the plasma membrane is a much larger molecule than an ion or glucose and more like a biopolymer or a dangerous digestive enzyme or a drop of proteins, cells use a completely different type of transport mechanism called ……………………………arrow_forward
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