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CAIE IGCSE Biology 14.3 Hormones Questions

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 as gland-produced chemicals carried in blood to alter target-organ activity
  • identify adrenal, pancreatic, testicular and ovarian glands and match their hormones in diagrams or tables
  • identify the pancreas as the gland that secretes glucagon
  • identify adrenaline as the fight-or-flight hormone and state its breathing, heart-rate and pupil effects
  • explain adrenaline's metabolic role: glycogen breakdown raises glucose for muscle respiration
  • compare nervous and hormonal control by speed and duration of effect

Covered syllabus points

14.3.1—Hormone as a chemical substance14.3.2—Specific endocrine glands and state14.3.3—Adrenaline as the hormone secreted14.3.4—Nervous and hormonal control14.3.5—Glucagon is secreted by the pancreas14.3.6—Role of adrenaline in the control

Question 1

[Maximum number: 3]

Insulin is a hormone that regulates the concentration of glucose in the blood.

Describe what is meant by the term hormone.

Question 2

[Maximum number: 1]

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.

Question 3

[Maximum number: 1]

Which hormone causes an increase in breathing rate, an increase in heart rate and the widening of pupils?

A

insulin

B

adrenaline

C

oestrogen

D

testosterone

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