Write true or false for the statement: Many of the involuntary actions are controlled by the midbrain and hindbrain.

Electrical impulse travels in a neuron from

Describe an activity to illustrate the phenomenon of phototropism and explain why this occurs.

Write true or false for the statement: Symptoms of goitre lead to swelling in the abdomen.

Which of the following statements are true?
$(i)$ Sudden action in response to something in the environment is called reflex action.
$(ii)$ Sensory neurons carry signals from the spinal cord to muscles.
$(iii)$ Motor neurons carry signals from receptors to the spinal cord.
$(iv)$ The path through which signals are transmitted from a receptor to a muscle or a gland is called a reflex arc.

Which is the main thinking part of the brain? State how it functions.