Section A: Nervous System Concepts
- What is a synapse? Why is it important?
- Write the path of a Reflex Arc starting from the receptor.
- What functions are performed by the Cerebrum? (Give 3 points).
- What is the function of the Cerebellum? What happens if it gets damaged?
- Which part of the brain maintains the posture and balance of the body?
- How is the brain protected from shocks and injuries?
- Differentiate between Sensory Neuron and Motor Neuron.
- What is a neuromuscular junction?
- Why does the reflex arc evolve in animals? (Thinking process is slow).
- Can you control your heartbeat? Why or why not?
Section B: Plant Coordination
- What are Tropic movements? Give one example.
- Name the plant hormone responsible for:
(a) Elongation of cells
(b) Growth of stem
(c) Promotion of cell division
(d) Falling of senescent leaves
- How do auxins promote the growth of a tendril around a support?
- Explain Phototropism with the help of a diagram.
- How is the movement of leaves of the sensitive plant different from the movement of a shoot towards
light?
Section C: Animal Hormones
- Why is Adrenaline called the "Fight or Flight" hormone? List two changes it brings in the body.
- Why are we advised to take iodised salt in our diet?
- How does our body respond when the blood sugar level rises? (Feedback mechanism).
- Name the hormone secreted by the:
(a) Thyroid gland
(b) Pituitary gland
(c) Pancreas
- List the functions of Testosterone and Estrogen.
Section D: Mixed Conceptual
- What is the difference between Reflex Action and Walking?
- How does chemical coordination take place in animals? (Endocrine system).
- Why is the use of iodised salt advisable?
- "Nervous coordination is fast but short-lived". Justify.
- What constitutes the Central Nervous System?
