BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
10th Edition
ISBN: 9781305967359
Author: STARR
Publisher: CENGAGE L
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Chapter 37, Problem 8SA
Summary Introduction
Introduction:
Toxic and unwanted material need to be removed in the body. The process of removal of such toxic substances from the body is called excretion. Breakdown of proteins produces nitrogenous wastes which are excreted by the urinary system. Urine formation occurs in kidneys by the filtration of blood.
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The kidneys in human beings are parts of the system for: (a) nutrition(b) respiration(c) excretion(d) transpiration
The glomerulus differs from other capillaries in the body in that it ________.
a)
is impermeable to most substances
b)
is the site for reabsorption of 99% of the filtrate
c)
has a blood pressure much higher than other capillaries
d)
has a basement membrane
The compact ball of capillaries in a nephron is called:- a. the nephron loop. b. the peritubular plexus. c. the renal corpuscle. d. the glomerulus. e. the vasa recta.
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BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
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- Which of the following does not contribute to the process of filtration? (a) active transport by epithelial cells lining renal tubules (b) large surface area for filtration (c) low permeability of glomerular capillaries (d) high hydrostatic blood pressure in glomerular capillaries (e) podocytesarrow_forwardBlood pressure forces water and small solutes out of blood and into nephrons during ________. a. glomerular filtration c. tubular secretion b. tubular reabsorption d. both a and carrow_forwardThe afferent arteriole delivers blood to the (a) renal artery (b) efferent arteriole (c) renal vein (d) capillaries of the glomerulus (e) peritubular capillariesarrow_forward
- As a person ages, nephron tubules lose some of their ability to concentrate urine. What is the effect of this change?arrow_forward1. The outer one-third of the kidney is called the A. Medulla B. Minor calyces C. Renal pyramid D. Cortexarrow_forwardFatty tissue holds the kidneys in place. Extremely rapid weight loss may cause this tissue to shrink so that the kidneys slip from their normal position. On rare occasions, the slippage can put a kink in one or both ureters and block urine flow. Suggest what might then happen to the kidneys.arrow_forward
- Water leaves the renal tubule bya. active transport. d. facilitated diffusion.b. filtration into the capillary network. e. symport.c. osmosis.arrow_forward1) From the descending limb of the nephron loop a water molecule would next pass into the ______. A) proximal convoluted tubule B) glomerulus C) ascending limb of the nephron loop D) collecting duct E) ureter F) urinary bladderarrow_forwardThe active transport of solutes into the lumen of an excretory organ iscalleda. filtration.b. reabsorption.c. secretion.d. excretion.arrow_forward
- Bowman’s capsule, the start of the tubular part of a nephron, is located in the_______ . a. renal cortex c. renal pelvis b. renal medulla d. renal arteryarrow_forwardADH-dependent aquaporins area. ion channels.b. water channels.c. receptors for ADH.d. small pores in the fenestrated capillaries of the glomerulus.e. both a and c.arrow_forwardThe return of filtered molecules from the nephron packet to the blood is called a. Excretion b. Reabsorption c. Filtration d. Secretionarrow_forward
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