Question

Chapter 42 Transport in mammals 1. What is the primary cause of the low velocity of blood flow through the capillaries? 2. How does increasing blood pressure by increasing cardiac output combined with diverting most blood flow to the skeletal muscles prepare the body to confront or flee danger 3. Explain how edema -the accumulation of fluid in the body tissues- can result from a decrease in plasma protein due to severe protein deficiency in the diet 4. How does an increase of CO, concentration in the blood affect the pH of the cerebrospinal fluid? 5. How does breathing differ in mammals and birds 6. Describe three adaptations that allow Weddell seals to stay 7. How does the circulatory system in fish and amphibians differ from mammals?

Answer 1

I will be providing answer of first question. Rest of the questions will be answered by other experts.

1)velocity of blood flow is inversely related to the area is cross section of the blood vessels. As the area increases, velocity decreases and vice versa.Since , capillaries have more cross sectional area, velocity of blood flow is low.

This allows enough time for exchange of nutrients and gases.