LET'S CHECK!
A. Choose the letter of the best answer.

1. What organ of the urinary system acts as a temporary storage of urine?
a. kidney
b. ureter
urethra
d. urinary bladder

2. By what process does the body eliminate waste products from the body?
a circulation
b. digestion
excretion
d. ingestion

3. What will happen to the body when the kidneys stop working?
The body accumulates poisonous substances in the blood.
b. The body becomes healthy and strong.
The body sweats a lot.
d. The body will be dehydrated.

4. What is NOT filtered from the blood by the kidneys?
a. excess salt
b. excess water
oxygen
d. urea

5. Urine is finally forced out of the body by the
a. contraction of the smooth muscles of the bladder
b. peristalsis of the smooth muscles of the ureters
c. the pumping of the cardiac muscles of the heart
d. the filtering of the nephrons of the kidney​