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WorksheetsCH 30 EXCRETORY SYSTEM
Total questions: 14
Worksheet time: 7mins
Name
Class
Date
1.
In addition to water, the principal components of urine are
a)
amino acids and fatty acids
b)
urea and salts
c)
ammonia and bile
d)
hydrochloric acid and bases
2.
Which structure is correctly paired with its function?
a)
urethra–eliminates urine from the bladder
b)
neuron–filters the blood
c)
ventricle–pumps blood directly into atria
d)
liver–produces intestinal amylase
3.
After reabsorption in nephrons is completed, the fluid that is left in the tubules is transported to the
a)
Bowman's capsule
b)
circulatory system
c)
urinary bladder
d)
bile duct
4.
The diagram represents a nephron. Which process takes place in region A?
a)
Proteins are converted to urea.
b)
Substances are filtered out of the glomerulus.
c)
Urine is stored temporarily.
d)
Water is reabsorbed into the blood.
5.
What is a major function of the blood vessel represented in the diagram?
a)
releasing carbon dioxide into the sweat gland
b)
transporting oxygen away from the sweat gland
c)
transporting wastes to the sweat gland
d)
filtering starch out of the sweat gland
6.
The excretory system is responsible for moving toxic wastes, dissolved molecules, and excess heat. You would conclude that the excretory system contributes to
a)
circulating molecules around the body
b)
maintaining dynamic equilibrium in the body
c)
producing egg and sperm cells in the body
d)
gas exchange
7.
Which sequence represents the correct pathway for the removal of urine from the human body?
a)
kidney → ureter → urinary bladder → urethra
b)
kidney → urethra → urinary bladder → ureter
c)
ureter → kidney → urinary bladder → urethra
d)
urethra → kidney → urinary bladder → ureter
8.
In humans, the organ that most directly regulates the concentration of water in the blood is the
a)
heart
b)
liver
c)
pancreas
d)
kidney
9.
In humans, the ureter transports urine from the
a)
blood to the kidney
b)
liver to the kidney
c)
kidney to the urinary bladder
d)
urinary bladder to outside the body
10.
As urine is excreted, muscle contractions of the urinary bladder will cause the urine to pass into the
a)
ureter
b)
glomerulus
c)
urethra
d)
Bowman's capsule
11.
What is the principal function of the excretory structure indicated by letter X in the diagram?
a)
reabsorption
b)
filtration
c)
storage
d)
egestion
12.
The nephron is the structural unit of the human
a)
lung
b)
liver
c)
kidney
d)
intestine
13.
What is the main function of a nephron?
a)
It breaks down red blood cells to form nitrogenous wastes.
b)
It regulates the chemical composition of the blood.
c)
It forms urea from the waste products of protein metabolism.
d)
It absorbs digested food from the contents of the small intestine.
14.
In humans, which substances are normally filtered out of the blood by the nephrons and then excreted?
a)
water, carbon dioxide, and glucose
b)
urea, water, and mineral salts
c)
water, glycogen, and urea
d)
glucose, water, and red blood cells
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