Urinary System Challenge

What part of the kidney is indicated by the arrow?

• renal medulla

• renal cortex

• renal capsule

• renal tubule

Which area of the nephron is the site of initial filtration?

• distal convoluted tubule

• proximal convoluted tubule

• loop of Henle

• glomerulus

Approximately how many nephrons are in each kidney?

• one or two

• between 8 and 15

• 96

• 1,000,000

Unlike ADH, the hormone aldosterone is secreted by the:

• adrenal glands

• hypothalamus

• kidney

• pituitary gland

The ______ a hydrometer sinks in a liquid, the lower the liquid's specific gravity.

• more

• less

In a normal human, which substance should be 100% reabsorbed, meaning that it should not be present in the urine

• glucose
• salt
• water
• urea

Which of the following is NOT filtered out of the blood in the kidneys?

• Blood cells

• Amino acids

• Urea

• Glucose

How is the lining of the PCT adapted for reabsorption?

• with a thin layer for short diffusion distance

• with microvilli for large surface area

Most H₂O is reabsorption occurs in the collecting duct.

• True

• False

Which tube returns filtered blood from the kidney back to the body?

• renal artery

• major calyx

• renal vein

• urethra