Homeostasis
- Created by: perks23
- Created on: 27-02-15 17:01
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- Homeostasis
- Controlling Temperature
- Controlling Water and Ion content
- Removing waste/leftover products
- Water
- Removed through the lungs as we breath out
- Removed through the skin as you sweat
- Excess is also removed through the kidneys as urine.
- Urea and Ions
- Removed through the skin as sweat
- Removed via the kidneys through urine
- Water
- Removing waste/leftover products
- Controlling Blood Glucose
- Principles of Homeostasis
- Automatic control systems in the body keep the conditions inside the body relatively constant.
- Control systems include;
- Cells called receptors, which detect changes in the environment
- Receptors are found in;
- Eyes - sensitive to light
- E.g Pupils dilating
- Ears - sensitive to sound and change in position (balance)
- E.g Hearing
- Skin - sensitive to touch, pressure, pain and changes in termperature
- E.g Moving hand away from something hot (burn)
- Brain - sensitive to blood pressure and the conc. of water in blood
- E.g Release of hormones
- Pancreas - sensitive to conc. of glucose in blood (sugars)
- E.g Release of Hormones
- Tongue and Nose - sensitive to chemicals
- E.g Taste and Smell
- Eyes - sensitive to light
- Receptors are found in;
- Co-ordination centers that receive and process information from the receptors
- Effectors, which bring out responses
- Cells called receptors, which detect changes in the environment
- Many of these processes are controlled by hormones, which are secreted by glands and transported by the blood stream
- Controlled conditions include;
- Water content
- Ion content
- blood glucose levels
- Termperature
- Controlling Temperature
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