Learn more about health with this collection
Basic survival skills
How to prioritize needs in survival situations
How to adapt to extreme situations
Disrupting the regulatory function.
Disease, stress, and diet can disrupt the regulatory function, changing the way the cells respond, such as in diabetes.
- Diabetes is a common hormonal disorder where the pancreas secretes too little insulin - the hormone that manages blood sugar levels.
- Hypo- and hyperthyroidism occur when the thyroid gland makes too little or too much thyroid hormone. Too little thyroid hormone cause a slowed heart rate, fatigue, and depression. Too much thyroid hormone causes weight loss, sleeplessness, and irritability.
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Glands and hormones
You have hormone-producing glands in your body,
- three in your brain,
- seven in the rest of your body.
Each is surrounded by a network of blood vessels from which they extract ingredients to make hormones. These are pumped out in tiny amounts into the bloodstream.
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Fluctuation of mood
Hormones can influence the production of certain chemicals in the brain, such as serotonin.
When chemical levels change, they can cause the mood to change. That doesn't mean that hormones have unlimited power over us, but they often drive our behaviour and make us slaves to their effects, f...
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The thyroid and the two hormones it produces
The two thyroid hormones, namely triiodothyronine and thyroxine, travel to the body's cells and influence how quickly those cells work and use energy.
In turn, that regulates everything from breathing to heartbeat, body temperature, and digestion.
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Hormones during puberty
Both men and women have estrogen and testosterone but in different amounts.
In men, puberty starts when the testes begin secreting testosterone. That triggers the development of the sexual organs and causes the voice to deepen.
In women, estrogen secreted from the ovaries helps the bo...
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Hormones and receptors
The hormones need to find a set of target cells to bring about a specific change.
Receptors - the special proteins inside or on the cell's surface - help hormones find their targets. The receptors recognise specific hormones as they move past and bind to them.
Once this happens, the h...
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The endocrine system causes changes in your body
Our bodies undergo many extraordinary metamorphoses over the course of our lives.
We grow, go into puberty, and many reproduce. Behind the scenes, the endocrine system works to arrange these changes. This system regulates everything from sleep to the rhythm of your heartbea...
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Hormone regulation
Hormones are regulated by other hormones, glands and organs, and by a negative feedback mechanism.
- Tropic hormones regulate the release of other hormones. The anterior pituitary in the brain, the hypothalamus, and th...
Sugar slows the brain down
A diet high in sugar makes learning difficult by slowing the brain down. Overconsumption of sugar damages synaptic activity in the brain.
When you consume too much sugar, you could develop resistance to insulin, the hormone responsible for regulating the function of brain cells.
The effect of overeating on the body
- Studies revealed that in physically active and healthy people, the body is able to control the sugar and fat in the blood after a big meal by working a bit harder than usual to regulate metabolism.
- Hormones released from the gut and pancreas help the body to regulate blood sugar le...
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