Increased vasoconstriction has an important role in which of the following situations? a. causing the decrease in blood pressure associated with faintingb. increasing blood flow to muscle during exercisec. increasing blood flow to skin during blushingd. maintaining blood pressure during a hemorrhage

How do all types of diffusion/passive transport actually ‘work’ without using even the smallest amount of cellular energy?

After frida stops exercising, she continues to breathe heavily. what is most likely occurring in her body? heavy breathing during exercise has produced an oxygen surplus in her muscles. this oxygen is being transported to her lungs. this is a result of aerobic respiration. heavy breathing during exercise has produced a carbon dioxide surplus in her muscles. lactate is being transported to her liver. this is a result of aerobic respiration. strenuous exercise has caused her body to be in carbon dioxide debt, and she is breathing hard while lactate is transported to the liver. this is a result of anaerobic respiration. strenuous exercise has caused her body to be in oxygen debt, and she is breathing hard while lactate is transported to the liver. this is a result of anaerobic respiration.

Lumps of iron and manganese ore called can be harvested from the seafloor near underwater volcanoes.