Textbook Question
Describe the changes that occur in kidney and bladder anatomy and physiology in old age.
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25. The Urinary System
Renal Physiology Step 1: Glomerular Filtration
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In renal physiology, blood enters the glomerulus through which vessel?
A
Peritubular capillaries
B
Vasa recta
C
Afferent arteriole
D
Efferent arteriole
Verified step by step guidance1
Understand the structure of the renal corpuscle, which includes the glomerulus and Bowman's capsule, where blood filtration begins in the kidney.
Recall that blood enters the glomerulus through a specialized arteriole called the afferent arteriole, which brings blood into the capillary network for filtration.
Recognize that after filtration, blood exits the glomerulus through the efferent arteriole, which then leads to other capillary networks such as the peritubular capillaries and vasa recta.
Differentiate between the vessels: the peritubular capillaries and vasa recta are involved in reabsorption and secretion around the nephron tubules, not in bringing blood into the glomerulus.
Conclude that the correct vessel through which blood enters the glomerulus is the afferent arteriole.
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