Regulating Peripheral Resistance - Part 2

In this episode, Leslie Samuel continues discussing peripheral resistance, focusing on blood viscosity and vessel length. Blood viscosity, influenced by the ratio of red blood cells to plasma, affects resistance, with dehydration increasing viscosity and anemia decreasing it. Blood vessel length also impacts resistance, with weight gain adding vessel length and increasing resistance. The episode concludes with a reminder to manage weight and an invitation to explore more resources on the Interactive Biology website.

What is the relationship between mean arterial pressure and peripheral resistance?

• Mean arterial pressure is independent of peripheral resistance.

• Mean arterial pressure is equal to cardiac output times peripheral resistance.

• Mean arterial pressure is the sum of cardiac output and peripheral resistance.

• Mean arterial pressure is inversely proportional to peripheral resistance.

How does an increase in blood viscosity affect peripheral resistance?

• It has no effect on peripheral resistance.

• It decreases peripheral resistance.

• It stabilizes peripheral resistance.

• It increases peripheral resistance.

Which condition can lead to a decrease in blood viscosity?

• Increased plasma volume

• Dehydration

• High red blood cell count

• Anemia

What happens to peripheral resistance when blood vessel length increases?

• Peripheral resistance fluctuates randomly.

• Peripheral resistance increases.

• Peripheral resistance decreases.

• Peripheral resistance remains unchanged.

How much additional blood vessel length is added with a gain of 2.2 pounds of fat?

• 200 miles

• 600 miles

• 800 miles

• 400 miles

What is the effect of gaining weight on blood vessel length?

• It decreases blood vessel length.

• It has no effect on blood vessel length.

• It increases blood vessel length.

• It shortens blood vessel length.

What is the take-home message regarding weight management?

• Weight has no impact on peripheral resistance.

• Weight management is unrelated to blood pressure.

• Managing weight can help control peripheral resistance and mean arterial pressure.

• Weight gain is beneficial for reducing peripheral resistance.