Q42 of 61 Page 62

What happens at the synapse between two neurons?

The junction between two neurons is called synapse. Transmission of nerve impulse between two neurons takes place through the synapse by means of neurotransmitter. In a synapse, chemical signal is transmitted from axonal end of one neuron to dendritic end of another neuron.


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40

What is a tropic movement? Explain with an example.

 41

What will happen if intake of iodine in our diet is low?

 43

Answer the following:

(a) Which hormone is responsible for the changes noticed in females at puberty?


(b) Dwarfism results due to deficiency of which hormone?


(c) Blood sugar level rises due to deficiency of which hormone?


(d) Iodine is necessary for the synthesis of which hormone?


(e) Name the endocrine gland associated with brain?


(f) Which gland secretes digestive enzymes as well as hormones?


(g) Name the endocrine gland associated with kidneys?


(h) Which endocrine gland is present in males but not in females?

 44

Answer the following :

(a) Name the endocrine gland associated with brain?


(b) Which gland secretes digestive enzymes as well as hormones?


(c) Name the endocrine gland associated with kidneys?


(d) Which endocrine gland is present in males but not in females?