Term
| Trade offs between nervous and endocrine responses, type of molecules used, and how they reach their target |
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Definition
Endocrine uses hormones released into the blood that go everywhere. They are slower than the nervous sytem but last longer. They are sent chemical and have a broad signal that reaches every cell, and activates those with receptors to receive it. There are varying levels and it can be hard to turn off by there's more potential for feedback.
Nervous: Neutrotransmitters used electrical and chemical signals. That last/take a fraction of a second and send specific binary signals to particular parts of the body. |
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Term
| Explain the origin of the pituitary gland and which parts of epithelial verses nervous tissue |
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Definition
| The pituitary gland has epithelial tissue and nervous tissue, though it is ectodermal in origin. The posterior area is derived from nervous tissue and has nerves from the hypothalamus in it. The anterior areas is epithelial tissue and connected to hypotha. by blood instead of nerves |
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Term
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Definition
| The lower part of the brain which communicates with/controls teh pituitary gland via nerve impulses and blood. |
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Term
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Definition
| Keeps various levels (temp, sugar, etc) within certain ranges |
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Term
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Definition
| The chemical signal transmitted between nerves. (seratonin, dopamine, etc) |
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Definition
| Hormones released by neurotransmitters into the blood stream |
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Term
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Definition
A change releases a chemical which causes that change to happen more which causes more of that chemical to be released.
For example breast feeding. The more milk is used, the more the body produces. |
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Term
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Definition
A change in the body causes a effect, but as the effect occurs, the change goes away, and thus the effect starts to go away as well.
For example when body temperature decreases we shiver and restrict blood vessels. As this warms the body, shivering ceases and blood vessels expand again. |
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