Hormonal control in humans
- Created by: freya_007
- Created on: 19-02-22 13:44
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- Hormonal Control in Humans
- The Endocrine System
- Glands
- Pancreas
- Produces insulin - regulates blood glucose level
- Adrenal Gland
- produces adrenaline
- Thyroid
- produces thyroxine - regulates heart rate, temp, metabolism
- Ovaries (fem)
- Produces oestrogen for menstrual cycle
- Testes (male)
- produce testosterone for sperm production
- Pituitary Gland
- directs other glands to release hormones
- Pancreas
- Glands
- Diabetes
- Type 1
- Little or no insulin is made
- persons blood glucose level can rise and kill them
- Insulin therapy - injections at mealtimes
- glucose is removed from the blood once food has been digested
- amount depends on diet and activeness
- Regular exercise and limiting intake of sugars
- Little or no insulin is made
- Type 2
- Insulin Resistance
- Body cells don't respond to insulin
- blood sugars rise to a dangerous level
- overweight and obese increases chance
- controlled by eating carb diet and regular exercise
- Insulin Resistance
- Type 1
- Controlling Blood Glucose
- Too much insulin
- glucose moves from blood into liver and muscle cells
- insulin secreted by pamcreas
- blood glucose reduced
- insulin makes liver turn glucose into glycogen
- Too low glucagon
- blood glucose increased
- glucagon secreted by pancreas
- glucose released into blood by liver
- Glucagon makes liver turn glycogen into glucose
- Too much insulin
- The Menstrual Cycle
- Hormones Involved
- FSH (Folicle Stimulating Hormone
- Produced in pituitary gland
- Causes an egg to mature in the ovaries (follicle)
- Stimulates the ovaries to produce oestrogen
- Oestrogen
- Produced in the ovaries
- Stimulates the release of LH (releases the egg and FSH)
- Causes lining of the uterus to grow
- LH (luteinising Hormone)
- Produced in pituitary gland
- Stimulates the release of an egg at day 14 (ovulation)
- Progesterone
- Produced in ovaries
- Maintains lining of the uterus
- Inhibits release of FSH and LH
- FSH (Folicle Stimulating Hormone
- The 4 stages
- Stage 1
- Day 1: menstruation starts
- Lining of the uterus breaks down
- Stage 2
- Day 4-14: uterus lining builds up
- thick spongy layer full of blood vessels - for fertilised egg
- Stage 3
- Day 14: egg is released
- ovulation (egg is developed and released)
- Stage 4
- Day 14-28: the wall is maintianed
- Cycle starts again
- Stage 1
- Hormones Involved
- The Endocrine System
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