Adrenal glands are located on top of each kidney. What will happen if these glands do not secrete adrenaline?

A plant in the laboratory is given an increased dose of a hormone, which promotes the development of seedless fruits. Identify the hormone and write its other two functions.

A boy runs on seeing a stray dog. His breathing rate becomes very fast and blood pressure also increases.

(i) Name the hormone found to be high in his blood and the gland which produces it.

(ii) What other effects are caused by this hormone?

The feedback mechanism is an important aspect of hormonal coordination. Explain.

(i) Name the parts labelled as A and B in the diagram given above.

(ii) Which part acquires the information in the neuron?

(iii) Through which part does the information travel?

(iv) In what form does the information travel?

(v) Where is the impulse converted into a chemical signal for onward transmission?