13. Which of these statements concerning the symport of glucose into cells is true? Understand a. The sodium-potassium exchange pump moves Nat into cells. b. The concentration of Nat outside cells is less than inside cells. c. A carrier protein moves Nat into cells and glucose out of cells. d. The concentration of glucose can be greater inside cells than outside cells. e. As Na are actively transported into the cell, glucose is carried along. This

13. Which of these statements concerning the symport of glucose into cells is true? Understand a. The sodium-potassium exchange pump moves Nat into cells. b. The concentration of Nat outside cells is less than inside cells. c. A carrier protein moves Nat into cells and glucose out of cells. d. The concentration of glucose can be greater inside cells than outside cells. e. As Na are actively transported into the cell, glucose is carried along. This

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter38: Introduction To Animal Organization And Physiology

Section: Chapter Questions

Problem 9TYK

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1. When all the protein carriers are used up, the carriers are said to be A. Adapted B. Unsaturated C. Saturated D. Consumed 2. The proteins that constantly transport sodium ions outside the membrane is called A. Membrane pump B. Calcium-potassium pump C. Sodium-potassium pump D. Glucose-potassium pump E. Protein-potassium pump 3. The process in the question above gets its energy from A. ADP B. ACT C. PTA D. ATP E. TPA
21. Pancreatic beta cells secrete the protein hormone insulin in response to various signals. Which of the following is/are true of these cells? a) They would have high concentration of insulin stored in membrane-bound vesicles adjacent to the plasma membrane. b) They would contain more mitochondria than an average cell. c) They participate in regulated secretion. d) a and c e) a, b and c
A characteristic of carrier molecules in a primary active transport pump is that: a. they cannot transport a substance and also hydrolyze ATP. b. they retain their same shape as they perform different roles. c. their primary role is to move negatively charged ions across membrances. d. they move Na+ into a neural cell and K+ out of the same cell. e. they act to establish an electrochemical gradient.
Cholera is a disease caused by bacteria that make cholera toxin. In the presence of this toxin, chloride ion channels in cells of the small intestine lining are stuck in their open position. As a result, an excess of chloride ions (Cl) flows from these cells into the lumen of the small intestine. Movement of Cl creates a charge gradient, so sodium ions (Na+) also flow into the lumen. Explain why the movement of these ions into the lumen results in the life-threatening diarrhea that characterizes cholera.
1. Glucose cannot enter easily inside the cell and require insulin to do so. What type of transport/movement does glucose may exhibit? 2. Short description of the process shown in the figure below and identify what type of transport/movement it is.
What effect will increasing the proportion of unsaturated fatty acids in the bilayer have on the membrane's permeability to glucose? A) Permeability to glucose will increase. B) Permeability to glucose will decrese. C) Permeability to glucose will stay the same. D) Permeability will decrease initially then increase as the bilyaer fills with glucose.
1. The Iron Response Factor (IRF) regulates production of both the iron transport protein transferrin and the iron storage protein ferritin in response to intracellular iron conditions, but its effect on the production of these two proteins is not the same. Describe or explain how the IRF can simultaneously lead to decreased production of the iron transport protein transferrin and increased production of the iron storage protein ferritin in response to high intracellular iron concentrations.
6. Why is Low Density Lipoprotein (LDL) considered “bad” cholesterol? A. Deliver fats made in liver to cells B. Remove cholesterol from the body and deliver to liver C.Carry digested fat through lymph to bloodstream D. Deposit cholesterol in walls of arteries 7. Which one of the following is/are a function (s) of cholesterol? A. Part of the cell plasma membrane B. Precursor for vitamin D synthesis C. Precursor for sex hormones D. All of the above 8. Which one of the following is /are types of lipids found in food and in your body? A. Sterols B. Phospholipids C. Triglycerides D. All of the above 9. True / False: Atherosclerosis is the ONLY risk factor associated with heart disease A. True B. False 10. Which one of the following carry digested fat through lymph into blood stream? A. Low density lipoprotein (LDL) B. High density lipoprotein (HDL) C. Chylomicrons D. Very Low Density lipoprotein (VLDL
5. Write the flowchart to show the breakdown of glucose by various pathways in the cytoplasm of living organisms.
The Na+ /glucose symport transports glucose from the lumen of the smallintestine into cells lining the lumen. Transport of 1 glucose molecule isdirectly coupled to the transport of 1 Na+ ion into the cell. 1 Na+out + 1 glucoseout → 1 Na+in + 1 glucoseinAssume the following conditions at 37 °C: [Na+]in = 12 mM, [Na+]out =145 mM, [glucose]out = 28 μM, and Δψ = -72 mV (inside negative).(a) What is ΔG for transport of Na+ from outside to inside under theseconditions?(b) What is the upper limit for [glucose]in under these conditions?(c) Which of the two hypothetical symports shown below (A or B) wouldachieve the highest concentration of [glucose]in under the conditionsdescribed above? Briefly explain your choice. A: 1 Na+out + 2 glucoseout → 1 Na+in + 2 glucosein B: 2 Na+out + 1 glucoseout → 2 Na+in + 1 glucosein
One of the following is TRUE? A. The transport of Na+ across cell membranes depends solely on concentration gradient B. The transport of sucrose across cell membranes depends solely on concentration gradient C. The transport of K+ across cell membranes depends solely on concentration gradient D. The transport of Ca2+ across cell membranes depends solely on concentration gradient E. A & C
1. Which of the following statements about secetion is true? All secretary vesicles bud offf the Golgi network and fuse with the plasma membrane continously without any regulation, in regulation secretion the secretary vesicles containing secreted materials are performed and position close to the plasma membrane allowing the rapid release of a large amount of cargo in a very short amount of time; the release of Insulin is a form of constitutive secretion; none 3. Which of the following statements is true? The signal sequence is always retained after proteins are imported into the mitochondria matrix; the vast majority of mitochondrial proteins are encoded in the mitochondrial genome; proteins are importedinto thmitochondriae 2.…