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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332

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BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332
Textbook Problem
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ADH binds to receptors on distal tubules and collecting tubules, making them ___ permeable to ______ .

  1. a. more: water
  2. b. less: water
  3. c. more; sodium
  4. d. less; sodium

Summary Introduction

Introduction: Hormone is important to regulate the urine’s concentration and its composition. Hypothalamus gland signals the pituitary gland to release antidiuretic hormone (ADH). ADH is a hormone that increases the reabsorption of the water through passive transport protein called aquaporins.

Explanation

Reasons for the correct statement:

Distal tubule and collecting tubule is the part of the nephron. ADH binds to the receptor on the distal tubules and collecting tubules making it more permeable to water. This help in the reabsorption of water.

Option a. is given as “more; water”. Hence, option a. is correct.

Reasons for the incorrect statement:

Option b. is given as “less; water”. However, ADH binds to the receptor on distal tubules and collecting tubules making it more permeable to water not less.

Therefore, option b. is the incorrect answer...

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