Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332



Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332
Textbook Problem

Blood pressure forces water and small solutes into Bowman's capsule during ___ .

  1. a. glomerular filtration
  2. b. tubular reabsorption
  3. c. tubular secretion
  4. d. both a and c

Summary Introduction

Introduction: Urine formation starts when the glomerular filtration delivers the protein-free of plasma into a kidney tubule. Most of the water and solutes are returned to the blood by tubular reabsorption machinery. Substances that are not reabsorbed, and which is added to the filtrate by tubular secretion, end up in the urine. The human urinary system consists of two kidneys, a pair of ureters, a urinary bladder, and the urethra. A nephron begins in the kidney cortex, where the tubule wall of nephron fold back on itself and form a cup- shaped structure called Bowman’s capsule.


Reasons for the correct statement:

Fluid filtered out of the glomerulus drains from Bowman’s capsule into the nephron’s proximal tubule. The process of filtration of fluid and waste products out of the blood in the kidney is called glomerulus filtration.

Option a. is given as “glomerular filtration”. Hence, option a. is correct.

Reasons for the incorrect statement:

Option b. is given as “tubular reabsorption”. However, tubular reabsorption is the process by which water and solutes returned to the blood...

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