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Homeostasis Practice Questions

Question 1

3 marks

The liver and the kidneys both help to remove waste substances from the blood.

(a)

Which substance is produced in the liver from the breakdown of excess amino acids?

A glucose

B glycogen

C urea

D urine

(b)

Describe what happens to excess amino acids in the body.

Question 2

3 marks

Figure 1 shows the human urinary system.

ABCD

(a)

Name the structures labelled A and B.

A ...............................................................

B ...............................................................

(b)

State the function of structure C.

Question 3

3 marks
(a)

State what is meant by the term homeostasis.

(b)

Give two conditions inside the human body that are controlled by homeostasis.

Question 4

2 marks

The concentration of glucose in the blood is controlled by hormones.

(a)

Which row of the table correctly describes a hormone and its effect on blood glucose concentration?

hormone effect on blood glucose concentration
A glucagon decreases it
B glucagon has no effect on it
C insulin decreases it
D insulin increases it
(b)

Name the organ that stores excess glucose as glycogen.

Question 5

3 marks

A doctor uses body mass index (BMI) as one measure of whether a patient is a healthy body mass.

BMI=body mass in kg(height in m)2\text{BMI} = \frac{\text{body mass in kg}}{(\text{height in m})^2}

A patient has a body mass of 7878 kg and a height of 1.721.72 m.

BMI category
below 18.5 underweight
18.5 to 24.9 healthy weight
25.0 to 29.9 overweight
30.0 and above obese
(a)

Calculate the BMI of this patient.

Give your answer to 1 decimal place.

(b)

Use the table to state the category this patient is in.