9. The sensitive plant (Mimosa) shows movement due to:
(a) Growth
(b) Change in water content
(c) Nervous tissue
(d) Muscle contraction
Answer: (b) Change in water content
10. Which hormone is produced by the testes?
(a) Oestrogen
(b) Adrenaline
(c) Testosterone
(d) Insulin
Answer: (c) Testosterone
11. The pituitary gland is located in the:
(a) Neck
(b) Brain
(c) Abdomen
(d) Kidney
Answer: (b) Brain
12. Which of the following is NOT a plant hormone?
(a) Auxin
(b) Gibberellin
(c) Adrenaline
(d) Cytokinin
Answer: (c) Adrenaline
13. The spinal cord is protected by the:
(a) Skull
(b) Vertebral column
(c) Rib cage
(d) Pelvis
Answer: (b) Vertebral column
14. Which hormone is responsible for the changes during puberty in females?
(a) Testosterone
(b) Oestrogen
(c) Thyroxin
(d) Insulin
Answer: (b) Oestrogen
15. The hormone that stimulates the pituitary gland is released by the:
(a) Hypothalamus
(b) Thyroid
(c) Adrenal gland
(d) Pancreas
Answer: (a) Hypothalamus
True or False
1. Reflex actions are controlled by the brain.
Answer: False (They are controlled by the spinal cord.)
2. Auxin is a plant hormone that promotes growth.
Answer: True
3. Adrenaline is secreted by the thyroid gland.
Answer: False (It is secreted by the adrenal gland.)
4. The cerebellum is responsible for maintaining posture and balance.
Answer: True
5. Synapse is the gap between two neurons.
Answer: True
6. Geotropism is the movement of plants in response to light.
Answer: False (It is in response to gravity.)
7. Insulin is produced by the pancreas.
Answer: True
8. The fore-brain is the main thinking part of the brain.
Answer: True
9. Tendrils move towards support due to hydrotropism.
Answer: False (It is due to thigmotropism.)
10. Hormones are transmitted via electrical impulses.
Answer: False (They are chemical messengers.)
11. The medulla controls voluntary actions like writing.
Answer: False (It controls involuntary actions.)
12. Iodine is essential for the synthesis of thyroxin.
Answer: True
13. Abscisic acid promotes cell division in plants.
Answer: False (It inhibits growth.)
14. The peripheral nervous system includes cranial and spinal nerves.
Answer: True
15. Growth hormone is secreted by the thyroid gland.
Answer: False (It is secreted by the pituitary gland.)
