Blood pressure physiology - BM5 RCR1&2

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1. A decrease in blood pressure will cause a decrease in baroreceptor firing. Once the CNS has registerested this, what will happen to the firing of the PNS and SNS nerves?

  • PNS firing would decrease, SNS firing would decrease
  • PNS firing would decrease, SNS firing would increase
  • PNS firing would increase, SNS firing would decrease
  • PNS firing would increase, SNS firing would increase
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Other questions in this quiz

2. What is pulse pressure?

  • The difference between systolic BP and diastolic BP (~40mmHg)
  • Arterial systolic blood pressure minus resistance encountered at pulse points (~100mmHg)
  • The blood pressure if measured at pulse points (~130/90mmHg)
  • (Diastolic BP + Systolic BP) / 2

3. At normal pressures, ~25% of C fibres are firing. If blood pressure increases, will the number of firing C fibres increase or decrease?

  • Increase
  • Decrease

4. In approximately what percentage of patients is their mild hypertension due to 'white coat syndrome'?

  • 20-50%
  • 10-40%
  • 5-35%
  • 15-45%

5. WHich of the following is true during exercise?

  • Cardiac output increases & peripheral resistance increases
  • Cardiac output decreases & peripheral resistance increases
  • Cardiac output increases & peripheral resistance decreases
  • Cardiac output decreases & peripheral resistance decreases

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