Loose-leaf Version for What Is Life? A Guide to Biology 4E & LaunchPad for What is Life? A Guide to Biology 4E (Twelve Month Access)
4th Edition
ISBN: 9781319154639
Author: Jay Phelan
Publisher: W.H. Freeman & Co
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Chapter 22, Problem 5MC
Summary Introduction
Introduction:
Platelets have no nuclei, and are filled with enzymes and other substances, for blood vessel repair.
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Recently, athletes have begun to take advantage of the benefits of extra red blood cells, in a process known as `` blood doping`` (You can do your own research on it). Two weeks prior to a competition, a blood sample is taken and centrifuged, and the red blood cell component is stored. A few days before the event, the red blood cells are injected into the athlete. Why would athletes remove red blood cells only to return them to their bodies later? What problems could be created.
When a human white blood cell “consumes” a red blood cell (erythrocyte), this process is called:
B. receptor-mediated endocytosis
C. pinocytosis
D. “cell-drinking”
E. exocytosis
F.phagocytosis
You place a red blood cell in an unknown solution and it begins to swell then bursts. Which of the following can you correctly conclude?
a
the solution is hypotonic
b
the solution is hypoosmotic
c
both A and B
d
neither A nor B
Chapter 22 Solutions
Loose-leaf Version for What Is Life? A Guide to Biology 4E & LaunchPad for What is Life? A Guide to Biology 4E (Twelve Month Access)
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- Which of the following is NOT a type of cell? A. ribosome B. haemocytoblast C. neutrophil D. phagocytearrow_forwardWhich of the following sudden changes might be a result of an infection? a. increase in the activity of white blood cells b. decrease in the activity of antigens produced by the mitochondria c. decrease in the amount of DNA present in the nuclei of cells d. increase in the number of red blood cellsarrow_forwardYou are a doctor in the emergency room. You have a patient whose blood cells are composed of the following: 80 molecules of glucose, 50 molecules of hemoglobin, 20 molecules of dextrose, and 2000 molecules of water. a. What is the total solute concentration of her cells? b. If you needed to make an isotonic solution of saline for her IV, how many salt molecules would you need to add to 1000 molecules of water? How do you know this is the correctamount?arrow_forward
- The red blood cells of birds differ from mammalian red blood cells because: a. they are white and have nuclei b. they do not have nuclei c. they have nuclei d. they fight diseasearrow_forwardThe average diameter of the amphibian red blood cell is 0.01 mm. How many red blood cells would be equal to the average diameter of a human red blood cell? Why does this red blood cell have a nucleus?arrow_forwardWhich of the following is not a chemical buffer in the body? a. carbohydrate b. protein c. phosphate d. hemoglobinarrow_forward
- A patient has had a serious accident and lost a lot of blood. In an attempt to replenish body fluids, a large amount of distilled water was transferred directly into one of his veins. What will be the most probable result of this transfusion? It will have serious, perhaps fatal, consequences because the red blood cells will be hypertonic relative to the body fluids and the cells will burst. It will have serious, perhaps fatal, consequences because the red blood cells will be hypotonic relative to the body fluids and the cells will shrivel. It will have no unfavorable effect as long as the water is free of viruses and bacteria. It will have no serious effect because the kidneys would quickly eliminate the excess water. It will have serious, perhaps fatal, consequences because there will be too much fluid for the heart to pump.arrow_forwardA man feels a shooting pain in his arm, then a thundering in his chest. Realizing that he is in the throes of a heart attack, he reaches for his self-injector of tPA (tissue plasminogen activator) and quickly injects himself. The tPA begins to break apart the blood clots that are blocking his heart’s circulation. This lifesaving protein is naturally found in the human body in tiny amounts. The man’s tPA drug, although identical to his own, was manufactured in bacteria. a. How is it possible for bacteria to express protein that was coded for by a human gene? b. Due to certain advances in biotechnology, it became much cheaper to produce tPA. What DNA technology made it possible to produce large quantities of this protein in bacterial cells?arrow_forwardWhich of the following occurs when erythrocytes are transferred from an isotonic solution to a hypertonic solution? Water leaves the cell and results to crenation. B Water leaves the cell and results to osmotic lysis. C) Water enters the cell and results to crenation. D Water enters the cell and results to plasmolysis.arrow_forward
- Which of the following cells are most different from the others in terms of their location in the body? a. astrocyte b. oligodendrocyte c. microglial cell d. Schwann cellarrow_forwardRed blood cells shrivel when placed in a 10% sucrose solution. When first placed in the solution, the solute concentration of the cell is______ the concentration of the sucrose solution. After the cells shrivel, their solute concentration is______ the concentration of the sucrose solution. A. Greater than... equal to B. Equal to... equal to C. Less than... greater than D. Less than... equal to E. Greater than... less thanarrow_forwardA hypertonic glucose solution A. Causes cell hemolysis B. Has the same osmotic pressure as red blood cells C. Causes cell crenation D. Has a concentration less than an isotonic solutionarrow_forward
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