CAIE IGCSE Biology 14.3 Hormones
Practise hormone questions by defining chemical messengers, matching endocrine glands, comparing control systems and interpreting adrenaline effects.
- Syllabus
- 2026–2028
- Course
- Biology 0610
Exam points
- define hormones and match endocrine glands to named hormones and target-organ effects
- interpret adrenaline fight-or-flight effects on pulse, breathing and pupil diameter
- compare nervous and hormonal control by speed, duration and communication route
Covered syllabus points
14.3 Hormones question 1
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
[ 1 ]
Question (i)
(i)
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
[ 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 ]
14.3 Hormones question 2
Substances move between blood and tissues at various sites in the circulatory system of mammals.
State the name of the organ that releases oestrogen into the blood.
14.3 Hormones question 3
Question (a)
(a)
When a body senses danger, more adrenaline is secreted from the adrenal glands.
Describe two ways in which the hormone adrenaline affects the body in preparation for action.
1
2
[ 2 ]
Question (b)
(b)
State one difference between nervous and hormonal control systems.
[ 1 ]
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