Climbers ascending mountains over 20000 feet in altitude have an increased ventilation rate (rapid breathing) and increased sweating associated with the physical work of climbing. Water intake is also typically limited under these conditions. Which of the statements below are true with regard to these mountain climbers? (Choose all that apply) the blood plasma becomes hypotonic relative to body cells the interstitial fluid compartment becomes hypertonic relative to the intracellular fluid compartment blood volume decreases the secretion of antidiuretic hormone will increase the secretion of antidiuretic hormone will decrease blood volume increases the blood plasma becomes hypertonic relative to body cells the intracellular fluid compartment becomes hypertonic relative to the interstitial fluid compartment
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Climbing at high altitudes involves increased physical exertion and altered breathing patterns due to lower oxygen levels. This leads to increased ventilation rates to maximize oxygen intake. Additionally, physical exertion causes increased sweating, which results Show more…
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Mountain climbers may have difficulty at high elevations because: More carbon dioxide occurs at higher altitudes The concentration of all elements of the air is lower at higher elevations Cooler temperatures restrict the metabolic activity of carbon dioxide in mountains The partial pressure of oxygen is lower at higher elevations
Madhur L.
27. When the concentration of solutes in the blood (blood osmolality) is high, the pituitary gland releases antidiuretic hormone (ADH). ADH stimulates the kidneys to reabsorb water in order to increase blood volume and decrease blood osmolality. If a person takes a long hike on a hot day without water, at the end of the day, the hiker drinks enough water to replace what was lost during the hike. Which statement explains the most likely physiological response that the hiker's body will experience after drinking the water? The pituitary gland will secrete ADH because drinking water will cause blood volume to increase, and an increased blood volume will cause the pituitary gland to release more ADH in a positive feedback loop. The pituitary gland will stop secreting ADH because drinking water will cause blood volume to increase, and an increased blood volume will cause the pituitary gland to stop releasing ADH in a negative feedback loop. The increased blood volume will prevent the release of ADH and cause the kidneys to excrete less water in a negative feedback loop. The high blood volume will increase the release of ADH and cause the kidneys to increase reabsorption of water in a positive feedback loop.
Adi S.
Use the accompanying image to select the correct terms in the statements below each of the cells shown. (a) This red blood cell is in a(n) (hypertonic / hypotonic / isotonic) solution. (b) In this environment, normal red blood cells (gain / lose / neither gain nor lose) water. (c) The total solute concentration outside the cell is (lower than / higher than / equal to) the total solute concentration inside it. (d) This red blood cell is in a(n) (hypertonic / hypotonic / isotonic) solution. (e) In this environment, normal red blood cells (gain / lose / neither gain nor lose) water. (f) The total solute concentration outside the cell is (lower than / higher than / equal to) the total solute concentration inside it. (g) This red blood cell is in a(n) (hypertonic / hypotonic / isotonic) solution. (h) In this environment, normal red blood cells (gain / lose / neither gain nor lose] water. (i) The total solute concentration outside the cell is (lower than / higher than $/$ equal to ) the total solute concentration inside it.
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