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33 Cards in this Set
- Front
- Back
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Which body process ensures a stable internal environment? |
Homeostasis |
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What is the purpose of the body's homeostasis process? |
To maintain a stable internal environment. |
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Name 3 things that homeostasis maintains the level of in the body. |
Water, sugar, ions |
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Why does homeostasis need to keep body conditions constant? |
So other body systems are not interrupted. |
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Name 4 things that the body needs to regulate in order to ensure proper function. |
Water, ions, sugar and temperature. |
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What affects the amount of sugar that is available for your body to use? |
The type of food you eat. |
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What does sugar enable your body to give to its cells? |
Energy |
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What food is used to provide energy to the cells of the body? |
Sugar |
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Name two types of ions |
Sodium and potassium. |
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Which process do the cells use to release energy? |
Respiration |
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Which process is used by homeostasis regulate the level of water in the body? |
Osmoregulation |
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How does water leave the body? |
When you breathe, sweat and urinate. |
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What part of the body regulates/releases the ions in the body? |
The kidneys |
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How is lost water replaced by the body? |
Drinking |
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How are ions lost from the body? |
Sweating and urinating. |
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How do you know that the body needs to take on more water? |
You feel thirsty. |
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What is the name of the process that regulates the temperature of the body? |
Thermoregulation |
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What is the purpose of thermoregulation? |
To regulate the body's temperature. |
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By regulating the body's temperature, what does thermoregulation help with? |
It helps enzymes work at their optimum rate. |
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What purpose do enzymes serve? |
They allow chemical reactions to happen at body temperature. |
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What is the normal body temperature. |
37 degrees |
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Without enzymes what would the normal body temperature need to be? |
Higher |
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How does homeostasis allow the body to regulate sugar, water,ions and temperature? |
A communication process called negative feedback. |
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What type of communication does homeostasis use? |
Negative feedback. |
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Describe the process of negative feedback. |
Recepters distributed around the body pick up changes in the environment. Changes are communicated to the brain. The brain co-ordinates a response by deciding what to do and sending messages to the bodys effectors (glands or muscles). The effectors then set conditions back to normal. |
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If something is too high in the body, what does the homeostasis system do. |
Uses negative feedback to make the body's effectors lower it. |
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Name two types of effectors used in homeostasis. |
Glands and muscles. |
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Why is the term "negative feeback" used. |
Because the body uses an opposite reaction to correct something e.g. if something is too high it lowers it and vice versor. |
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What part of the body secrets hormones? |
Glands |
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What are hormones? |
Chemical messengers that affect how organs work. |
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What is the name for the chemical messengers that affect how the body works? |
Hormones. |
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What chemicals cause the kidneys to release or keep water? |
Hormones |
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What is the name of the two types of things that homeostasis uses to maintain a stable internal environment in the body? |
Effectors and receptors. |
