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Makenna Staples
Physiology weeks 7-13
| Question | Answer |
|---|---|
| What is the all or none principle of action potentials? | The all-or-none principle of action potentials is known as the point in time in which that certain membrane depolarizes and if it reaches the threshold or not and whether the action potential is triggered. |
| What is the main function of the sympathetic nervous system? | The main function of the SNS is to serve as an emergency system to our body when it is under physical or psychological stress. |
| What is the main function of the parasympathetic nervous system? | The main function of the PNS is to be the dominant controller of autonomic effectors most of the time under the quiet non stressful events. |
| What is light touch? | Light touch is described as a subtle feeling in one certain spot on the skin and is mediated by a free nerve ending known as a tactile disk. |
| What is the renin-angiotensin-aldosterone system? | Renin is an enzyme that is released when blood pressure in the kidney is low. This system changes blood plasma volume and aldosterone becomes triggered because of renin and aldosterone promotes sodium retention by the kidney. |
| What is passive immunity? | Passive immunity is when immunity to one certain disease that is in one individual or animal is transferred to someone else who was was not previously immune to it and they end up catching that disease. |
| What is active immunity? | Active immunity is when someones own immune system responds to a disease or agent that is not wanted in the body whether it was naturally or artificially caught by the individual. |
| What is tidal volume? | Tidal volume is the amount of air you exhale after you inhale. At rest for average adults this is around 500 mL. |
| What is expiratory reserve volume? | Expiratory reserve volume is that leftover amount of tidal air that you are forcing out. The normal amount for adults is between 1,000 and 1,200 mL. |
| How do we get full from food? | Our stomachs get filled with food and our afferent fibers and nerves inside begin to tell our brain it's time to slow down so that way we don't over eat. Our brain receives these messages from the stomach and we get the sensation of being full. |
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MakennaS44
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