- What is tropic movement? Expla n wi h an example.
- What will happen if intake of iodine in our diet is low?
- What happens at the synapse between two neurons?
- Which hormone is responsible for the changes noticed in females at puberty?
- Dwarfism results due to deficiency of which hormone?
- Blood sugar l vel rises due to deficiency of which hormone?
- Iodine is necessary for the synthesis of which hormone?
- Name the endocrine gland associated with brain?
- Which gland secretes digestive enzymes as well as hormones?
- Name the endocrine gland associated with kidneys?
- Which endocrine gland is present in males but not in females?
12. What are the major parts of the brain? Mention the functions of different parts.
13. What constitutes the central and peripheral nervous systems? How are the components of
central nervous system protected?
14. Mention one function for each of these hormones :
(a) Thyroxin
(b) Insulin
(c) Adrenaline
(d) Growth hormone
(e) Testosterone.
15. Name various plant hormones. Also give their physiological effects on plant growth and
development.
16. What are reflex actions? Give two examples. Explain a reflex arc.
17. “Nervous and hormonal systems together perform the function of control and
coordination in human beings.” Justify the statement.
18. How does chemical coordination take place in animals?
19. Why is the flow of signals in a synapse from axonal end of one neuron to dendritic end of another neuron but not the reverse?
