EBK HUMAN ANATOMY
9th Edition
ISBN: 8220103631327
Author: Nath
Publisher: PEARSON
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Chapter 20, Problem 2RC
Summary Introduction
Introduction:
Red blood cells (RBCs) or erythrocytes are biconcave shaped cells, which contain hemoglobin for oxygen transport from lungs to different tissues. These cells lack a nucleus, mitochondria, ribosomes, and other organelles. RBCs are produced in red bone marrow and each RBC has a life span of 120 days.
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a) How much more O2 can be transported by the blood when erythrocytesleave the lungs? Consider that a normal adult has a concentration of 15 g hemoglobin/100 mL of bloodand that the hemoglobin is 98% saturated with O2 at the usual pO2 of 100 torr in the lung at sea level.
b) On the basis of the graph, explain how myoglobin facilitates the diffusion of O2 through muscle cells. Would myoglobin be effective as an O2-transport protein in cells of other tissues? Explain.
You are studying with a friend who is describing the Bohr effect. She tells you that in the lungs, hemoglobin binds oxygen and releases hydrogen ion; as a result, the pH increases. She goes on to say that in actively metabolizing muscle tissue, hemoglobin releases oxygen and binds hydrogen ion and, as a result, the pH decreases. Do you agree with her reasoning? Why or why not?
Select the best answer or answers from the choices given: Which of the following best defines cellular respiration? (a) intake of carbon dioxide and output of oxygen by cells, (b) excretion of waste products, (c) inhalation of oxygen and exhalation of carbon dioxide, (d) oxidation of substances bywhich energy is released in usable form to the cells.
Chapter 20 Solutions
EBK HUMAN ANATOMY
Ch. 20 - The five figures to the right are labeled a...Ch. 20 - Prob. 2RFTCh. 20 - Prob. 3RFTCh. 20 - The most abundant proteins in blood are (a)...Ch. 20 - 5. The major classes of white blood cells...Ch. 20 - Prob. 6RFTCh. 20 - Prob. 7RFTCh. 20 - Prob. 8RFTCh. 20 - Prob. 9RFTCh. 20 - Prob. 10RFT
Ch. 20 - 11. Platelets are
(a) large cells that lack a...Ch. 20 - Prob. 1RCCh. 20 - Prob. 2RCCh. 20 - Prob. 3RCCh. 20 - Prob. 4RCCh. 20 - Prob. 5RCCh. 20 - What is the fate of megakaryocytes?Ch. 20 - Prob. 7RCCh. 20 - Prob. 8RCCh. 20 - Prob. 1CTCh. 20 - 2. Mononucleosis is a disease that can cause an...
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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
- Which of the following statements correctly describes why white muscle fibers do not need is mini mitochondria as red muscle fibers? a) want muscle fibers use anaerobic respiration which does not occur in the mitochondria b) what muscle fibers use anaerobic respiration which requires more efficient mitochondria than aerobic respiration c) white muscle fibers get more oxygen than the red muscle fibersarrow_forwardDo the following conditions cause hemoglobin to release more O2 to the tissues or to absorb more O2?(a) Raising the temperature(b) Increased production of CO2(c) Increasing the H+ concentrationarrow_forwardIn most tissues, if the temperature is increased by 10°C, how much is the rate of respiration increased?arrow_forward
- What is the difference between respiration and aerobic cellular respiration?arrow_forwardPractice concentration gradients: A) Active tissues generate carbon dioxide during cell respiration. This carbon dioxide diffuses out of the tissue into the bloodstream. 1) where is the higher concentration of carbon dioxide ? 2) is Carbon dioxide flowing down or against its concentration gradient ? 3) Is energy required for the movement of carbon dioxide ? Calculate concentration gradient solute 55M Solute 52Marrow_forwardIn muscles, anaerobic respiration has an advantage over aerobic respiration in that it: A) Has a high energy lactic acid waste, rather than CO2 B) Produces alcohol and carbon dioxide C) is a shorter, quicker way to produce ATParrow_forward
- Why is the binding of oxygen to hemoglobin cooperative while the binding of oxygen to myoglobin is not? A) Myoglobin has more x-helix than hemoglobin B) Hemoglobin has more iron (Fe) atoms C) Hemoglobin has more than one subunit D) Myoglobin is affected by changes in pHarrow_forwardin thalassemia, a type of anemia, the hemoglobin molecule is malformed. The malformation prevents hemoglobin from carrying and delivering the correct amount of oxygen to the cells. Which important physiological concept does this example illustrate?arrow_forwardThe following image shows the respiratory membrane with its components labelled from A to E. Avpotis Which of the following is the structure labelled "B" in this image? a) Basal lamina b) Endothelium Oc) Surfactant layer d) Simple squamous alveolar epitheliumarrow_forward
- It is essential for the cells in plants and animals to have an adequate supply of oxygen. Explain what the oxygen is needed for in the cells? (Be as specific as possible.)arrow_forwardOxygen has an allosteric interaction with hemoglobin. What are the results of this interaction as oxygen a) binds to and b) is released from hemoglobin?arrow_forwardIn our discussion of oxygen binding, we saw how oxygen affinity may be affected by temperature. The book mentions that "temperature effects may become a problem in the hypothermic limbs of mammals in Arctic climates," (pg. 650) but it doesn't explain why. Given what you understand about oxygen binding affinity and temperature, why would these animals have an issue? O The cold temperatures increase the binding affinity of oxygen to myoglobin. The cold temepratures decrease the binding affinity of oxygen to hemoglobin. The cold temperatures increase the binding affinity of oxygen to hemoglobin. The cold temperatures decrease the bindingg affinity of oxygen to myoglobin.arrow_forward
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