Question

what is the name of the cup-shaped structure in the cortex of the kidney?
a. bowmans capsule
b. loop of henle
c. glomerulus
d. renal pelvis

the process of filtration in the kidneys begins with the passage of fluid and solutes from the blood into the:
a. loop of henle
b. glomerulus
c. collecting duct
d. renal pelvis

which structure of the nephron is found in the medulla of the kidney?
a. distal convoluted tubule
b. loop of henle
c. bowmans capsule
d. proximal convoluted tubule

Explanation:

Identify the cup-shaped structure in the cortex

Using the Renal Anatomy knowledge point, we identify the cup-shaped sac at the beginning of the tubular component of a nephron in the mammalian kidney. This structure is Bowman's capsule, which encloses the glomerulus.

Determine the start of filtration

The process of filtration begins as blood pressure forces fluid and dissolved solutes out of the glomerular capillaries. This filtrate passes directly into Bowman's capsule, which is the initial receiving chamber of the nephron. However, looking at the options provided:

• a. loop of Henle
• b. glomerulus
• c. collecting duct
• d. renal pelvis

None of these options list Bowman's capsule. In standard physiological descriptions, filtration is the passage of fluid from the blood (within the glomerulus) into the Bowman's space/capsule. If the question asks where the fluid goes from the blood, it enters Bowman's capsule. If it asks where the filtration process physically occurs or begins, it is at the glomerulus. Let's re-evaluate the phrasing: "passage of fluid and solutes from the blood into the...". Since Bowman's capsule is not an option, we must look at the anatomical pathway. The blood flows through the glomerulus, and the filtrate enters the capsular space. In some simplified curricula, the glomerulus itself is considered the site where fluid enters the nephron pathway from the systemic circulation, but anatomically, fluid moves from the glomerulus (blood) into Bowman's capsule.

Let's re-examine the options carefully. If Bowman's capsule is missing, let's consider if there is a typo in the question or if "glomerulus" is the intended answer as the starting site of filtration. Actually, fluid moves from the blood in the glomerulus into the Bowman's capsule. If Bowman's capsule is not listed, let's check if any other option makes sense. The loop of Henle, collecting duct, and renal pelvis are much further downstream. Thus, by elimination of completely incorrect downstream structures, the initial filtration barrier interface is at the glomerulus.

Locate the nephron structure in the medulla

Using the Renal Anatomy knowledge point, we determine which parts of the nephron reside in the renal medulla versus the renal cortex:

• The proximal convoluted tubule, Bowman's capsule, and distal convoluted tubule are located entirely within the renal cortex.
• The loop of Henle extends down into the renal medulla.

Answer:

Question 1

• a. Bowman's capsule (Correct answer)
• b. Loop of Henle
• c. Glomerulus
• d. Renal pelvis

Question 2

• a. loop of Henle
• b. glomerulus (Correct answer)
• c. collecting duct
• d. renal pelvis

Question 3

• a. Distal convoluted tubule
• b. Loop of Henle (Correct answer)
• c. Bowman's capsule
• d. Proximal convoluted tubule