95440
Descrição
FlashCards por alexlpeart, atualizado more than 1 year ago
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Criado por alexlpeart
aproximadamente 11 anos atrás
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| Questão | Responda |
| Describe how central command works to control our heart. What is this process called? | commands to muscles and heart travel in parallel meaning heart rate changes according the the action we do. This process is called efference copying. |
| Suggest how we can look at the effect of central command. | Give curare, ask participant to make a movement and we still see an increase in heart rate despite muscle contraction still occurring. |
| What happens to neural control of the heart when we anticipate exercise? | Vagal tone removed thus increasing heart rate |
| What does muscle metabolite production depend upon? | Fiber type, training status, blood flow obstruction, volume of interstitial fluid. |
| Does acidosis affect our muscle neural control? Specifically what does it do, what evidence is there for this being the case? | Increases sympathetic nerve activity. McArdle patients don't experience acidosis and don't see an increase in muscle sympathetic nerve activity. However McArcles patients still experience an increase in heart rate so HR must be centrally controlled. |
| where are the arterial baroreceptors located? | Carotid sinus and aortic arch |
| What do the arterial baroreceptors detect? | Stretch, so blood pressure |
| Suggest how we can simulate increased or decreased blood pressure. | Using a neck cuff which we blow or suck against to simulate changes in blood pressure. |
| What happens if we remove arterial baroreceptors. | Significant increase in BP variability. |
| What happens to the baroreceptor response as we increase exercise intensity? | causes the curve to move up and to the right. |
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