Unit 2: Control and Coordination Quiz

100 DAYS ACTION PLAN - MARCH 2026

UNIT 2 – CONTROL AND COORDINATION

1 Marks Questions

28. Name the hormone responsible for phototropism in plants.

[Image of auxin in phototropism]

Auxin.
It helps the shoot bend towards light by accumulating on the shaded side of the plant.

29. The gap between two neurons is called ________.

[Image of a synapse between two neurons]

Ans: b) Synapse

30. Which part of the brain helps in riding a bicycle?

Cerebellum.
It maintains precision of voluntary actions and controls balance and posture.

31. What are the major functions of medulla oblongata?

• Controls involuntary actions.
• Regulates heartbeat, breathing, salivation, and blood pressure.

32. If the cerebrum is damaged, which of the following may happen?

Ans: b) Person cannot recall memories

33. What disease may be caused due to lack of Iodine in our daily food?

Goitre

34. Name the part of the brain that controls posture and balance of the body?

Cerebellum

35. What will happen if all the functions of the human body are controlled by brain?

• Actions slow down (because reflex actions wouldn't be handled locally).
• The workload becomes too heavy for the brain to process simultaneously.

36. Which part of the brain regulates hunger and thirst?

Hypothalamus

37. Which plant hormone is responsible for the wilting and falling of leaves?

Abscisic acid (ABA)

38. What will happen if reflex action does not occur in our body?

[Image of a reflex arc]

• We cannot respond quickly to immediate danger (like touching a hot stove).
• There would be a significantly higher chance of severe injury.

39. Give an example of hormone-inhibiting or promoting growth in plants.

Growth Promoting	Growth Inhibiting
Auxin / Gibberellins / Cytokinins	Abscisic acid

40. What happens if the cerebellum is influenced by alcohol?

• Loss of balance and physical stability.
• Poor coordination of voluntary movements and slurred speech.