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Grade 7 Biology chapter 5

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.

How many kidneys do mammals have?

a)

1

b)

2

c)

3

d)

4

2.

Where is urea created?

a)

liver

b)

kidneys

c)

stomach

d)

all of the above

3.

Correct path of urine in body?

a)

bladder -> urethra -> kidneys

b)

kidneys -> ureters -> bladder

c)

liver -> blood -> kidneys -> bladder

d)

kidneys -> bladder -> ureters

4.

Which of the following excreted from sweat glands in the skin?

a)

water

b)

salts

c)

urea

d)

all of the above

5.

How much Urine does a Child and an Adult pass out in 24 Hours ?

a)

1 to 1.8 litres

b)

5 litres

c)

2.4 litres

d)

1.6 litres

6.

How Much % of the Human Urine Contains Water ?

a)

60%

b)

90%

c)

95%

d)

50%

7.

What is the function of the Ureter?

a)

Carry Urine

b)

Store Urine Until It is Ready For Elimination

c)

Collect Urine

d)

Tells the Brain That the Bladder Is Full

8.

What Filters the Blood Vessels in The Kidney ?

(a)  

9.

Blood is cleaned by which organs?

a)

Lungs

b)

Ribs

c)

Kidneys

d)

Intestines

10.

The job of your kidneys is to...

a)

Create feces

b)

Take carbon dioxide out of your blood

c)

Put oxygen into your blood

d)

Clean blood, sending waste to bladder

11.
Which organ of the excretory system stores urine until the body is ready to eliminate it?
a)
ureters
b)
urethra
c)
urinary bladder
d)
urea
12.
Tiny filtering structures where urine is produced in the kidneys are called
a)
ureters.
b)
alveoli.
c)
nephrons.
d)
bronchi.
13.
Under normal conditions, which of the following substances is found in urine?
a)
blood cells
b)
protein
c)
glucose
d)
urea
14.
In which excretory organ is urea produced?
a)
skin
b)
liver
c)
kidneys
d)
lungs
15.
Which excretory organ eliminates water and some chemical wastes in perspiration?
a)
lungs
b)
skin
c)
liver
d)
kidneys
16.
What function do the kidneys perform?
a)
eliminate carbon dioxide
b)
supply oxygen to body cells
c)
remove urea and excess water
d)
play a role in gas exchange
17.
The process of removal of the body’s wastes is called
a)
gas exchange.
b)
respiration.
c)
excretion.
d)
filtration.
18.
Organs of excretion that maintain homeostasis include the kidneys, lungs, skin, and
a)
bronchus.
b)
diaphragm.
c)
bladder.
d)
liver.
19.
Using the picture, what is the function of structure B?
a)
Carries urine away from the kidneys
b)
Stores urine
c)
Eliminates urea, excess water, and some other materials
d)
Carries urine away from body and eliminates it
20.
Using the picture, what is the function of structure C?
a)
Carries urine away from the kidneys
b)
Stores urine
c)
Eliminates urea, excess water, and some other materials
d)
Carries urine away from body and eliminates it

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