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CAIE IGCSE Biology 14 Coordination & Response

Review nervous and hormonal coordination, sense organs, homeostasis and tropic responses through diagrams and experimental data.

Syllabus
2026–2028
Course
Biology 0610

Covered syllabus points

14.1 Coordination and response14.2 Sense organs14.3 Hormones14.4 Homeostasis14.5 Tropic responses

14. Coordination and response question 1

[Maximum number: 1]

Heart rate is influenced by electrical impulses from the brain.

State the name of the type of cell that conducts electrical impulses to the heart.

14. Coordination and response question 2

[Maximum number: 12]

The eye is a sense organ that is part of the nervous system.

Question (a)

(a)

Explain why the eye can be described as a sense organ.

[ 2 ]

Question (b)

(b)

State the two parts of the central nervous system.

1
2

[ 2 ]

Question (c)

(c)

Fig. 5.1 is a diagram of a section through the human eye.

Fig. 5.1

Fig. 5.1

[ 4 ]

Question (i)

(i)

Draw an X on Fig. 5.1 to identify the blind spot.

[ 1 ]

Question (ii)

(ii)

Table 5.1 shows some of the parts labelled in Fig. 5.1, their names and their functions.

Complete Table 5.1.

Table 5.1

Table 5.1

[ 3 ]

Question (d)

(d)

State the names of the two effectors that contract and relax during the pupil reflex. and

[ 1 ]

Question (e)

(e)

Explain why a person is unable to focus on distant objects if the suspensory ligaments become permanently overstretched.

[ 3 ]

14. Coordination and response question 3

[Maximum number: 17]

Question (a)

(a)

The endocrine system in mammals produces hormones.
Define the term hormone.

[ 2 ]

Question (b)

(b)

The responses of the human body to danger are coordinated by the nervous and endocrine systems.

Fig. 4.1 shows the sequence of events that occurs in response to a dangerous situation that is detected by the eyes.

Fig. 4.1

Fig. 4.1

[ 6 ]

Question (i)

(i)

State the tissue in the eye that converts light energy into nerve impulses.

[ 1 ]

Question (ii)

(ii)

State the part of the eye that has the highest concentration of light-sensitive cells and gives the most detailed image.

[ 1 ]

Question (iii)

(iii)

State the type of neurone that conducts impulses from the eye to the brain.

[ 1 ]

Question (iv)

(iv)

State the nerve that contains these neurones that conduct impulses from the eye to the brain.

[ 1 ]

Question (v)

(v)

Identify the organ labelled P.

[ 1 ]

Question (vi)

(vi)

Identify the gland labelled Q.

[ 1 ]

Question (c)

(c)

Complete Table 4.1 to describe the effects of the hormone released when a person is in a dangerous situation.

Table 4.1

Table 4.1

[ 4 ]

Question (d)

(d)

Explain the advantages of coordinating the response to a dangerous situation using both the nervous system and the endocrine system.

[ 4 ]

Question (e)

(e)

Plants also make hormones.

State the name of one hormone made by plants.

[ 1 ]

14. Coordination and response question 4

[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 ]
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