7

Total marks – 60Time – 60 min

Q 1. Draw a labelled diagram of a neuron. List its functions.

Q 2. Somatotropin is secreted by the posterior lobe of the pituitary gland. 

Q 3. Flowers of primrose exhibit thigmotropism. 

Q 4. Which of the following acts as a neurotransmitter in the synaptic cleft?

Q 5. Central canal of the spinal cord contains:

1) Cerebrospinal fluid

2) Interstitial fluid

3) Aqueous humour

4) Pleural fluid

Q 6. Progesterone controls the development of secondary sexual characters during puberty in females. 

Q 7. Which gland secretes the adrenaline hormone? Write its importance in our body.

Q 8. (a) Which hormone is responsible for the changes noticed in males at puberty? (b) Deficiency of which hormone leads to dwarfism. (c) Name the hormone which is injected to a diabetic patient.

Q 9. The thalamusrelays pain and pressure impulses to the cerebrum.

Q 10. What are nastic movements? Describe its various types briefly.

Q 11. Which gland secretes the growth hormone? What will happen if growth hormone is secreted in improper amount?

Q 12. Sweating profusely after exercise is a voluntary response.

Q 13. State the functions of any three of the structural and functional unit of nervous system.

Q 14. Briefly explain the reflex arc.

Q 15. The reflex action is fast as the responses are preinstalled in the brain.

Q 16. The stem of a creeper does not exhibit positive phototropism.

Q 17. Abscisic acid promotes seed dormancy.