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20 Cards in this Set
- Front
- Back
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Homeostasis |
The body's maintenance of a relatively stable internal physiological environment |
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Dynamic equilibrium |
A star of balance achieved within an environment as a result of internal control mechanisms |
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Control mechanisms |
Goose bumps,shivering,transfer of heat energy and sweating |
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Vascoconstriction |
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Vasodiliation |
Blood vessels near the skin dilate to transmit more blood to the skins surface where it is released |
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Negative feedback loop |
Is a process that detects and reverses deviations from normal body constants |
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Negative feedback parts |
Receptor, integrator and effector |
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Receptors |
Send nerve impulses (stimuli) to the brain response to environmental info |
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Integrator |
Sends messages to effectors |
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Effectors |
Cause a change to internal conditions cause the body to make heat or conserve heat |
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Positive feedback |
Act to increase the strength of the stimuli |
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Sphincters |
Two rings of muscles that control the exit of the bladder one is voluntarily controlled by the other is involuntary by the brain |
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Kidney's principle function |
To filter the blood in order to remove cellular waste products from the body |
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Kidney 3 sections |
The outer cortex, medulla and inner pelvis |
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What is within the cortex and medulla of each kidney? |
About one million tiny filters called nephrons |
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Nephron's 5 parts |
Bowman's capsule, proximal tubule , loop of Henle , distal tubes and collecting duct |
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Reabsorption |
Process where materials required by the body are removed from the filtrate and returned to the bloodstream |
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Isotonic |
A fluid that has the same concentration of water solutes as that in the cells surrounding it |
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Antagonistic hormones |
Hormones that have opposing psychological properties but that work together |
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Islets of Langerhans |
Groups of cells in the pancreas that produce insulin and glycogen |
