Assuming arterial blood pressure stays constant, if an arteriole constricts do the diameter is reduced to 50% of the original value, how will blood flow be reduced?
What will be an ideal response?
Answer: Because blood flow is proportional to the radius raised to the fourth power, blood flow will be reduced to ½ ½ ½ * ½ = 1/16 the original value.
You might also like to view...
Cells that are the main water-conducting cells of a
plant are a. sclereids. b. tracheids. c. sieve tubes. d. parenchyma. e. all of these.
Contraction of the diaphragm ____.
A. diminishes the volume of the thoracic cavity B. increases the volume of the thoracic cavity C. pushes the rib cage downward D. causes external intercostal muscles to relax E. decreases lung capacity
Infectious protein particles are called
A. phages. B. oncogenic viruses. C. prions. D. viroids. E. spikes.
Which of the following is not a source of ATP for muscle contraction?
A. aerobic respiration B. ATP in the blood C. ATP produced in the cell D. fermentation E. the creatine phosphate pathway