The menstrual cycle and hormones

Which hormone causes an egg to mature in the ovaries?

• LH

• oestrogen

• progesterone

• FSH

Select the two hormones that are released from the pituitary gland.

• LH

• oestrogen

• progesterone

• FSH

Which hormone is responsible for maintaining the lining of the uterus?

• LH

• oestrogen

• progesterone

• FSH

Explain what happens when progesterone levels fall.

How does this change if a fertilised egg implants in the uterus lining?

Explain the role of LH in the menstrual cycle.

TSH is hormone released by which major gland?

• Thyroid

• Pituitary gland

• Adrenal gland

• Ovary

The release of TSH causes which gland to release thyroxine?

• Thyroid

• Pituitary gland

• Adrenal gland

• Ovary

Too little thyroxine in the body can result in the following symptoms: fatigue, feeling cold, low heart rate and weight gain.

Using ideas about metabolic rate, suggest why a lack of thyroxine can lead to these symptoms.

Explain the role of TSH in controlling the level of thyroxine in the body.

Your answer should include ideas about what happens if there is too much or too little thyroxine in the body.