A hormone secreted by the adrenal glands in times of fear or stress.

A hormone secreted by the thyroid gland that stimulates the basal metabolic rate.

A mechanism where changes to conditions cause an action to reverse the change, keeping conditions stable.

An organ or tissues that produces and secretes substances, such as hormones.

Adrenaline, thyroxine and negative feedback, including TRH

Combined science

Pupils will learn more about photosynthesis in producers, including a two-stage model of the process and the requirements and products of each stage.

Pupils learned how the components of the human nervous system enable us to respond quickly to changes outside and inside our bodies.

Match the hormone to the gland that it is secreted by. 

Blood is diverted to major limb muscles. 

Which of the following correctly describe the effect of adrenaline on the body?

What is the mechanism called where the body detects changes in conditions, then reverses these changes to bring levels back to normal?

The hypothalamus is stimulated to secrete TRH.

The thyroid gland is stimulated to produce thyroxine.

Thyroxine levels increase back to normal.

Put these steps in order to show the body's response to low levels of thyroxine. 

There is more TSH available to stimulate the thyroid gland.

TSH in inhibited and so does not stimulate the thyroid gland.

Which of the following statements are true when thyroxine levels are too high?

At point B TRH and TSH are being secreted.

At point D TRH and TSH are being secreted.

The graph below shows changes in thyroxine over time. Which statements about the graph are correct?

The image shows glands of the endocrine system. What are the circled glands called?

Which hormone is secreted by the adrenal glands?

Which gland in the human body is involved in regulating metabolism?

What is the name of the hormone secreted by the thyroid gland?

Which gland is known as the master gland?

Regulation of constant internal conditions for optimum enzyme activity and cell function is called ...