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Multiple Choice
Where does filtration of the blood occur within the kidneys?
A
Collecting duct
B
Glomerulus
C
Loop of Henle
D
Proximal convoluted tubule
Verified step by step guidance
1
Understand the structure of the nephron, which is the functional unit of the kidney. The nephron consists of several parts, including the glomerulus, proximal convoluted tubule, loop of Henle, distal convoluted tubule, and collecting duct.
Learn the primary function of each part of the nephron. The glomerulus is responsible for filtration, while the proximal convoluted tubule, loop of Henle, and collecting duct are involved in reabsorption, secretion, and concentration of urine.
Focus on the glomerulus, which is a network of capillaries located within the Bowman's capsule. Blood enters the glomerulus through the afferent arteriole, and filtration occurs as water, ions, and small molecules pass through the capillary walls into the Bowman's capsule.
Understand the process of filtration. Filtration is driven by hydrostatic pressure in the glomerulus, which forces plasma and solutes through the filtration membrane. Larger molecules like proteins and blood cells are retained in the bloodstream.
Review why the other options (collecting duct, loop of Henle, and proximal convoluted tubule) are not responsible for filtration. These structures are involved in modifying the filtrate after it has been produced in the glomerulus.