In which of the following scenarios would a person experience an increase in blood flow? a. a factory worker cuts his hand on a machine and loses a pint of blood. b. fats and cholesterol accumulate in the blood which increases its viscosity. c. surface blood vessels constrict in response to cold temperaturesd. a person at rest begins to move heavy boxes of a flight of stairs

Why are carbon dioxide concentrations expected to increase? a carbon dioxide concentrations are expected to increase, because fossil fuel burning is expected to increase b. carbon dioxide concentrations are expected to increase, because of an increase in agriculture. c.carbon dioxide concentrations are expected to increase, because more land will have to be cleared for increasing populations and agricultural use. d. all of the above select the best answer from the choices provided mark this and return save and exit next submit submit