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CAIE IGCSE Biology 14.4 Homeostasis

Practise homeostasis questions on stable internal conditions, blood glucose control and temperature regulation through skin responses.

Syllabus
2026–2028
Course
Biology 0610

Exam points

  • describe homeostasis as maintaining stable internal conditions for enzyme activity
  • explain insulin lowering blood glucose through pancreas secretion and liver uptake
  • apply negative feedback to glucagon, skin blood flow, sweating and shivering responses

Covered syllabus points

14.4.1—Homeostasis as the maintenance14.4.2—Insulin decreases blood glucose14.4.3—Concept of homeostatic control14.4.4—Control of blood glucose concentration14.4.5—Treatment of Type 1 diabetes14.4.6—Of the skin: hairs, hair erector14.4.7—Maintenance of a constant internal14.4.8—Maintenance of a constant internal

14.4 Homeostasis question 1

[Maximum number: 9]

Fig. 6.1 shows the changes in glucose concentration of the blood.

Fig. 6.1

Fig. 6.1

Question (a)

(a)

Name the process that maintains blood glucose concentration within set limits.

[ 1 ]

Question (b)

(b)

Name the hormone that would be secreted in response to the increasing blood glucose concentration at A in Fig. 6.1.

[ 1 ]

Question (c)

(c)

Name an organ that is responsible for the decrease in blood glucose concentration after B in Fig. 6.1.

[ 1 ]

Question (d)

(d)

Name the compound that is converted to glucose at C in Fig. 6.1.

[ 1 ]

Question (e)

(e)

Describe the symptoms and treatment of Type 1 diabetes.

[ 5 ]

14.4 Homeostasis question 2

[Maximum number: 10]

Fig. 6.1 is a flow chart of some of the events that occur to maintain a constant body temperature.

Fig. 6.1

Fig. 6.1

Question (a)

(a)

State the name of one effector shown in Fig. 6.1.

[ 1 ]

Question (b)

(b)

State the name of the mechanism that controls homeostasis which is represented by the flowchart in Fig. 6.1.

[ 1 ]

Question (c)

(c)

Describe how shunt vessels in the skin function to help cool the body when the body temperature is high.

[ 3 ]

Question (d)

(d)

Describe how the sweat glands and the hair erector muscles function in mammals when the external environment is hot.

[ 3 ]

Question (e)

(e)

List two hormones that are involved in homeostasis.

1
2

[ 2 ]
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