Hormones

Reproductive, plant, human

Reproductive…

Human egg

Reproductive

• Pituitary Gland releases FSH• Follicle-stimulating hormone (FSH)• FSH stimulates women’s eggs• Ovaries release oestrogen• Oestrogen causes ovary lining to thicken• Pituitary gland releases LH• Luteinizing hormone• LH stimulates egg release• When eggs are unfertilised, periods occur

Reproductive TermsName of hormone: Made in the… Activity:

FSH Pituitary Gland Causes egg to mature

Oestrogen Ovaries Causes line to thicken in first half of the cycle

LH Pituitary Gland Stimulates ovulation (release of the egg from the ovary)

Stimulate means…. Encourage activity

What is the correct term for the release of the egg? secretion

Inhibit means… To stop process or production

Gland hormone organ Gland Hormone Target organs

Ovary Oestrogen Ovaries, uterus

Ovary Progesterone Uterus

Pancreas Insulin Liver

Testes Testosterone Male reproductive organ

Pituitary Gland

Produces 2 hormones involved in fertility:• FSH• LH

Plant Hormones…

Plant

• Auxin – a plant hormone produced in the stem tips and roots.

• A 'tropism' is a growth in response to a stimulus. Plants grow towards sources of water and light, which they need to survive and grow.

Tropism

• Plants need light and water for photosynthesis, to ensure they get both they rely on tropisms.

• positive tropism – towards the stimulus• negative tropism – away from the stimulus• phototropism – growth in response to light• geotropism – growth in response to gravity

Homeostasis…

Human HOMEOSTASIS

• Homeostasis is the keeping under control of:Temperature (37 degrees)GlucoseWater Ion content • thermoregulatory centre is the part of the brain that

controls body temperature.• The pancreas monitors and controls blood glucose. The

pancreas contains insulin that lowers blood glucose levels.

Maintaining body temperature in HOMEOSTASIS.

• Too hot: blood vessels dilate so blood vessels are closer to the skin and more energy can escape. VASODILATION

• Too cold: blood vessels constrict so blood vessels are further away from the skin and consequently less energy is lost. VASOCONRTRICTION

Quiz …

Quiz• Pituitary gland releases:• LH and FSH• Where is oestrogen found and what does it do?• Found in ovary, thickens ovary lining• Why does a period occur?• Egg is unfertilised• LH does…? FSH does…?• LH - Stimulates ovulation, FSH- matures egg• Correct term for releasing egg is:• Secretion• What is it to have the process stopped?• Inhibit

• What hormone do the following glands create? Ovary, ovary, pancreas, testes • oestrogen, progesterone, Insulin, testosterone• Plant hormone is:• Auxin• Explain TROPISM:• The control of growth in plants. Directing them to grow to sunlight and water.• positive tropism, negative tropism, phototropism, geotropism• Growth towards stimulus, growth away from stimulus, growth towards sunlight,

growth towards gravity• Homeostasis keeps under control:• Water, temperature, ion, glucose• Where does the brain control temperature? • Thermoregulatory• What does the pancreas contain?• Insulin• What does the pancreas control?• Glucose levels• Vasodilation• Blood vessels dilate (get wider) so that energy can escape through skin when hot• Vasoconstriction• Blood vessels constrict (get narrower) so less energy is lost when cold.