The Kidneys

Question 1

What are the major excretory and osmoregulatory organs of mammals

Answer 1

The kidneys

Question 2

Describe the function of the kidney

Answer 2

The kidneys control the amount of water in the body and cleanse the blood of nitrogenous and other waste products.

Question 3

What is the function of the bladder

Answer 3

The bladder stores urine temporarily before it is released into the environment

Question 4

What is the role of the renal vein

Answer 4

The renal vein takes cleansed blood away from the kidneys back to the heart

Question 5

What is the urethra

Answer 5

The urethra is a tube leading from the bladder to the environment through which urine is expelled.

Question 6

What controls the release of urine from the bladder?

Answer 6

Sphincter muscles control the release of urine from the bladder

Question 7

How do sense cells in the bladder walls contribute to urination

Answer 7

Sense cells in the bladder walls are stimulated when the bladder fills, triggering the desire to relax the sphincter muscles and contract the walls of the bladder

Question 8

What regions make up a kidney

Answer 8

The cortex, medulla, and pelvis

Question 9

What are nephrons?

Answer 9

Nephrons are tiny structures within the kidney responsible for filtering blood and producing urine.

Question 10

How does urine flow through the kidney

Answer 10

Urine is collected by nephrons, flows through collecting ducts, and then into the pelvis before being transported to the bladder through the ureter