When you smell a favourite food your mouth begins to water (that is, you secrete saliva). Write down what the following are examples of:

(a) the smell of the food

(b) the cells in your nasal passages which perceive the smell

(c) the gland which is stimulated to secrete saliva.

The blood Pressure, salivation, pupil movement, etc. are all the involuntary movements. Which part of the brain is responsible for controlling these actions?

A child is frightened by a loud noise and shouts for help. In which order the different types of neurons in neurons involved will act?

i. What does the given experimental set-up demonstrate?

ii.

(a) Label the two parts indicated by Question marks and labelled 1 and 2 in the above diagram.

(b) Suggest a suitable caption or heading for the above diagram.

OR

What is the difference between the manner in which movement takes place in a sensitive plant and the movement in our legs?

Adrenaline hormone is secreted in the body during emergency situations. What would be the effects of increased concentration of adrenaline on body?

Following are certain reflex actions occurring in our body.

I. Moving to the side of road when a speeding car approaches.

ii. Closing of eyes in response to a sudden bright light.

iii. Shouting when we are suddenly disturbed or get scared

iv. Withdrawing hands on touching a hot surface. The reflex is given below, will be occurring for,