Biology 2e
Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Chapter 41, Problem 11RQ

Contractile vacuoles in microorganisms:

  1. exclusively perform an excretory function
  2. can perform many functions, one of which is excretion of metabolic wastes
  3. originate from the cell membrane
  4. both b and c

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Which of the following is TRUE concerning glucose transport across the proximal convoluted tubule (PCT)? Group of answer choices must choose one answer Glucose is usually absorbed approximately 70% here and the remainder of the absorption is under hormonal control in the distal convoluted tubule (DCT). Glucose moves by paracellular transport. Glucose moves across the apical membrane by secondary active transport via co-transport with sodium. Glucose transport is passive, requiring facilitated diffusion across both the apical and basolateral membranes.
Metabolism of nutrients by body cells produces various wastes such as carbon dioxide and nitrogenous toxins (creatinine, urea, and ammonia), as well as imbalances of water and essential ions. These metabolic wastes and excesses must be eliminated from the body. Essential substances are retained to ensure proper body functioning. Although several organ systems are involved in excreting (getting rid of) toxic cellular wastes, the urinary system bears the primary responsibility for removing nitrogenous wastes from the blood. In addition to this purely excretory function, the kidneys maintain the electrolyte, acid-base, and fluid balances of the blood. Thus, kidneys take care of your blood and are major homeostatic organs of the body. Malfunction of the kidneys leads to a failure of homeostasis, resulting (unless corrected) in death. 1. Complete the statements (hint: read paragraph above): The kidney is referred to as an excretory organ because it excretes also a major homeostatic organ…
Explain how active and passive transport or different. Include at least two major differences

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