In insects, O₂ moves from the gas exchange surface to the cells primarily by: A. Diffusion B. Active transport C. Convection D. Conduction E. None of the above
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- Gas transport in mammalian bodies happens through the alternation of two processes. In the circulatory system gasses are transported by To pass into the tissues gases are transported by ...consilience; ...osmosis () ...circulation; ...active transport ) .conduction; ..diffusion O..convection ...diffusion O O OOwhich of the following processes causes most of the carbon dioxide from the blood to move into the alveoli? a. passive transport using a carrier proteins b. active transport using energy c. conversion to carbon dioxide d. diffusion down a concentration gradientThe time it takes for blood to pass through the capillaries of a pulmonary alveolus typically is less than 0.3 seconds. During this time, what will occur? Select one: a. The blood plasma will be cleansed of its entire CO2 content and will be saturated with O2. b. An enzyme will catalyze the conversion of oxyhemoglobin to carboaminohemoglobin. c. Blood will pick up CO2 and O2 will be released to the alveolus. d. Blood will pick up O2 and CO2 will be released to the alveolus.I think this is C or D tell me the answer and why
- You have read about the Respiratory system in your Animal Physiology classes and are very excited to share the knowledge with one of your friend in the Chemistry Department. You explain to him the gas exchange between tissues and blood. However, your friend is very confused about the fact that how almost an equal amount of O2 & CO2 is exchanged in normal human (even during exercise) when the diffusion coefficient of CO2 is 20 times that of O2 (as CO2 is much more soluble in body tissues than O2). a) Explain the reason for the same to your friend. b) Why this equilibrium can’t be maintained in people who have a diseased lung with thickened walls?Which of the following transport processes move oxygen and carbon dioxide across the alveolar Type I cell? A. Primary active transport OB. Secondary active transport OC. Convection D. Diffusion OE. Facilitated diffusionDefine the term “exchange surface” and list four common features of gas-exchange organs in animals.
- Which of the following is a true statement? A. The concentration of oxygen in water is greater than that in air. B. In animals with gills, ventilation helps to reduce the thickness of the boundary layer. C. Countercurrent flow at the gas-exchange surface results in the diffusion gradient across surface. D. Mammalian lungs requires the diaphragm because the lungs are relatively stiff and filled with parabronchi.O2 bound to hemoglobin: a. acts the same as physically dissolved oxygen b. Comes off the hemoglobin (dissociates) more easily as you increase the oxygen partial pressure c. exerts a partial pressure d. Comes off the hemoglobin (dissociates) more easily as you increase the acidity (decrease the pH) e. all the options are correct 2. Air convection in mammals is driven by a smaller pressure gradient than blood convection because: a. Bronchioles have a greater resistance to flow than arterioles b. bronchioles tend to have a smaller radius than arterioles and capillaries c. air is easier to move with pressure gradients than blood d. air generally travels farther in your body than does blood e. air is heavier than blood 3. The rate of diffusion of gases is NOT determined by which of the following? a. The area of the surface across which diffusion is occurring b. The mechanical energy…BASED ON THE TEXT, what is meant by "semipermeable membrane" and why is it necessary to gas exchange between O2 and CO2? USE THIS SENTENCE STARTER : a semipermeable membrane means.... A semipermeable membrane is needed for exchange of oxygen and carbon dioxide because...
- The transportation of carbon dioxide involves a reversible reaction involving the bicarbonate ion. If this reaction was not readily reversible, then carbon dioxide would would drop, as high carbon dioxide levels cause hyperventilation build up in the tissues and become toxic would remain at a constant level, as red blood cells are frequently replaced be released in the lungs when the concentration gradient become largeThe direction that a gas diffuses is determined by a. the solubility of the gas in the solutions present on either side of a semipermeable membrane b. the partial pressure of the gas on either side of a semipermeable membrane c. the concentration of solutes in the solution into which the gas is dissolving d. none of the choices is correctOxygen and carbon dioxide diffuse across our respiratory surface into and out of the blood via simple diffusion. The respiratory membrane is thin so gases diffuse only a short distance through the liquid and into the blood. Fluid buildup in the lungs increases the distance through the liquid medium. How does this impact the concentration of oxygen in the blood? Explain.
