49. A 25 year old man has drunk 2000 mL of water over the past 4 hours. For the past hour,he's felt the need to urinate but has not done so. He has remained continent because ofwhich of the following?a. Inhibition of parasympathetic spinal cord neuronsb. Inhibition of somatic motor neurons of the external urethral sphincterc. Inhibition of sympathetic neurons of the internal urethral sphincterd. Stimulation of descending sympathetic pathways to the internal urethral sphinctere. Stimulation of parasympathetic spinal cord neurons

Continent means ability to control urination voluntarily.

Answered: 49. A 25 year old man has drunk 2000 mL…

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter37: Maintaining The Internal Environment

Section: Chapter Questions

Problem 11SA

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1. The outer one-third of the kidney is called the A. Medulla B. Minor calyces C. Renal pyramid D. Cortex
Which of the following does not contribute to the high salt concentration in the interstitial fluid of the kidney medulla? (a) active transport of sodium from the upper part of the ascending limb (b) diffusion of salt from the ascending limb of the loop of Henle (c) reabsorption of salt from various regions of Bowmans capsule (d) counterflow of fluid through the two limbs of the loop of Henle (e) diffusion of urea out of the collecting duct
Match each .structure with a function. _____ ureter a. start of nephron _____ Bowmans capsule b. delivers urine to body surface _____ urethra c. carries urine from kidney to bladder _____ collecting tubules d. secretes ADH _____ glomerulus e. target to aldosterone _____ pituitary gland f. cluster of leaky capillaries
Blood 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 c
Which of the following correctly describes a part of kidney function? a. Collecting ducts dilute urine because they are permeable tosalt but not water. b. In the ascending loop of Henle, Na1 and Cl2 move into thetubules because the osmolarity of the filtrate is increased. c. The descending loop of Henle receives filtrate from theascending loop. d. The distal convoluted tubule pumps water into the tubule byactive transport. e. The renal pelvis receives urine from the collecting ducts andcarries it to the ureters.
Which of the following is an example of autoregulation of kidney function? a. The RAAS regulates Na1 by secreting renin when blood pressure or blood volume decreases. b. The ADH system regulates water balance by decreasing water reabsorption and increasing excretion of salt. c. Receptors in the juxtaglomerular apparatus detect a higher salt concentration in the distal convoluted tubule and trigger constriction of the afferent arteriole to reduce glomerular filtration rate. d. ANF is released by the kidney to increase renin release. e. Angiotensin II lowers blood pressure by constricting arterioles.
The afferent arteriole delivers blood to the (a) renal artery (b) efferent arteriole (c) renal vein (d) capillaries of the glomerulus (e) peritubular capillaries
The functional unit of the kidney is called ________. the renal hilus the renal corpuscle the nephron Bowmans capsule
Plasma fluid filtered into Bowmans capsule flows directly into the ________. a. renal artery c. distal tubule b. proximal tubule d. loop of Henle

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