Mammalian Hormones (Cambridge O Level Biology)

The endocrine system in mammals produces hormones.

Define the term hormone.

The responses of the human body to danger are coordinated by the nervous and endocrine systems.

Fig. 1 shows the sequence of events that occurs in response to a dangerous situation that is detected by the eyes.

Fig. 1

State the tissue in the eye that converts light energy into nerve impulses.

[1]

State the part of the eye that has the highest concentration of light-sensitive cells and gives the most detailed image.

State the type of neurone that conducts impulses from the eye to the brain.

State the nerve that contains these neurones that conduct impulses from the eye to the brain.

Identify the organ labelled P.

Identify the gland labelled Q.

Complete Table 1 to describe the effects of the hormone released when a person is in a dangerous situation.

Table 1

Explain the advantages of coordinating the response to a dangerous situation using both the nervous system and the endocrine system.

Plants also make hormones.

State the name of one hormone made by plants.