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Biology - GCSE > Hormones > Flashcards

Flashcards in Hormones Deck (14):
1

Define the term "hormone"

Hormones are chemical messages produced by endocrine glands and are released directly into the blood

2

Name 1 hormone produced in the ovaries

Estrogen

3

Name 1 hormone produced in the pancreas

Insuline

4

Name the endocrine gland that produces the growth hormone

The pituarity gland

5

Name a target organ of growth hormones

The brain and the muscles

6

How does the growth hormone reach its target organ

Travels through the blood stream

7

Define the term "metabolic rate"

The rate at which you convert the energy stored in food to your body

8

What is thyroxine

The hormone made in the thyroid gland

9

What are the effects of thyroxine

Causes heart cells to contract more and causes proteins and carbohydrates to break down more quickly

10

What does thyroxine increase

Metabolic rate

11

How is the release of thyroxine controlled

The amount of thyroxine released by the thyroid gland is controlled by other hormones. This is an example of negative feedback

12

What does low levels of thyroxine do

It stimulates TRH production in the hypothalamus and cause the pituitary gland to release TSH

13

What does TRH stand for

Thyrotopin-releasing hormone

14

What does TSH stand for

Thyroid-stimulating hormone