1 / 11

Higher Biology

Higher Biology. Hormonal Control of Growth in Animals. Hormonal Control of Growth. By the end of this lesson you should be able to:. Know what a hormone is. Know the names of 2 hormones produced by the anterior pituitary gland. Describe the role of thyroxine. Introduction.

dacey
Download Presentation

Higher Biology

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Higher Biology Hormonal Control of Growth in Animals

  2. Hormonal Control of Growth By the end of this lesson you should be able to: • Know what a hormone is. • Know the names of 2 hormones produced by the anterior pituitary gland. • Describe the role of thyroxine.

  3. Introduction • Hormones are chemical messengers. • They are produced in one part of the body (in tiny quantities) and carried in the blood to another part of the body where they have their effect. Hormone affects target organ Gland produces hormone Hormone carried in blood

  4. Pituitary Hormones • The anterior lobe of the pituitary gland is found at the base of the brain. • It produces many hormones (remember ADH?). • Two hormones it produces are involved in growth and development. • i.e. Human Growth Hormone (GH) and Thyroid Stimulating Hormone (TSH)

  5. Human Growth Hormone (GH) • Also known as somatotrophin • Is produced by the anterior pituitary gland • Travels in the blood • Target organs- bones (particularly the long bones in the arms and legs) and cartilage • Effects- accelerates amino acid transport into bones and cartilage. • Permits rapid synthesis of tissue proteins

  6. Human Growth Hormone (GH) • So causes growth. • The growth spurt in adolescence is due to increased production of GH. • Human GH animation • Underproduction Overproduction In adolescence- very long bones in arms & legs. In adulthood- large hand, feet & jaw bones Reduction in overall growth

  7. Thyroid Stimulating Hormone (TSH) • Is produced by the anterior pituitary gland • Travels in the blood • Target organs- thyroid gland (in the neck) • Effects- controls growth and activity of the thyroid gland & produces thyroxine (another hormone!) • Thyroxine regulates metabolic processes in the body. • Lack of TSH drop in metabolic rate lack of thyroxine

  8. TSH and Thyroxine Put the following stages into the correct order: Increases metabolic rate Thyroid gland Pituitary gland thyroxine TSH Increases metabolic rate thyroxine Thyroid gland TSH Pituitary gland

  9. Pituitary Hormones • Insert and complete the “Endocrine Summary” diagram from your pack into your notes.

  10. Practice Questions • Torrance • TYK pages 249 Q1 and 2

  11. Hormonal Control of Growth Can you do it? • Know what a hormone is. • Know the names of 2 hormones produced by the anterior pituitary gland. • Describe the role of thyroxine.

More Related