Page 85 - Biology_Form_3
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Biology for Secondary Schools
2. Which part of the brain plays a crucial (d) Stress decreases osmolality,
role in regulating body temperature, leading to increased water
hunger, thirst, and hormone release? retention.
(a) Cerebrum 6. What is the role of insulin in glucose
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(b) Cerebellum regulation?
(c) Hypothalamus (a) To increase blood glucose levels.
(d) Brainstem (b) To decrease blood glucose levels.
3. What type of feedback mechanism (c) To maintain constant blood
is primarily used to control hormone glucose levels.
production and release?
(a) Positive feedback loop (d) To regulate blood pressure.
(b) Negative feedback loop 7. Which disorder results from an
(c) Both positive and negative overproduction of cortisol, leading
feedback loops to symptoms like weight gain and
(d) Neither positive nor negative high blood pressure?
feedback loops (a) Addison’s disease
4. What is the main function of the (b) Cushing’s disease
adrenal glands during stress? (c) Diabetes mellitus
(a) To produce hormones that reduce (d) Hypothyroidism
stress. 8. Compare the communication
(b) To produce hormones that methods of the endocrine and
increase metabolism. nervous systems. What is the key
(c) To produce hormones that prepare difference?
the body for ‘fight or flight.’ (a) The endocrine system uses
(d) To produce hormones that aid in electrical signals, while the
digestion. nervous system uses chemical
5. How does stress affect the body’s signals.
water retention? (b) The endocrine system uses
(a) Stress decreases osmolality, chemical signals, while the
leading to increased water loss. nervous system uses electrical
(b) Stress increases osmolality, signals.
leading to increased water (c) Both systems use the same type
retention. of signals.
(c) Stress does not affect water (d) The endocrine system is faster
retention. than the nervous system.
78 Student’s Book - Form Three
23/10/2025 11:52:42
BIOLOGY FORM 3 FINAL EDITED 16.09.2025.indd 78
BIOLOGY FORM 3 FINAL EDITED 16.09.2025.indd 78 KAMISHNA 23/10/2025 11:52:42 KAMISHNA
