As oxygen levels in a tissue decrease, the precapillary sphincters contract.True false question.TrueFalse

What is the function of precapillary sphincters?Multiple choice question.They control blood flow into the capillary network.They provide a lipid transport mechanism.They allow large molecules and cells to exit the network.They absorb carbon dioxide from the tissues.

Which of the following best describes the primary role of precapillary sphincters in the microcirculation?Group of answer choicesPrecapillary sphincters regulate blood pressure within the arteries.Precapillary sphincters regulate blood flow into capillary beds based on metabolic demands.Precapillary sphincters control the exchange of gases in the capillaries.Precapillary sphincters facilitate the contraction of skeletal muscles during exercise. Previous

What controls the relaxation and contraction of the precapillary sphincters?Multiple choice question.the force of contraction of the ventriclesthe innervation of the surrounding skeletal musclesthe pressure of the colloid osmotic component of capillary exchangethe availability of oxygen and nutrients to the tissues surrounding the capillary network

Local control of blood flowMultiple ChoiceAll of the choices are correct.Both "occurs because of contraction or relaxation of precapillary sphincters" and "causes an increase in blood flow when oxygen levels increase in tissue spaces" are correct.occurs because of contraction or relaxation of precapillary sphincters.causes precapillary sphincters to contract when carbon dioxide levels decrease in tissue spaces.causes an increase in blood flow when oxygen levels increase in tissue spaces.

2 / 2Which of the following would not result in the dilation of the feeder arterioles and opening of the precapillary sphincters in systemic capillary beds?choose one• a local increase in histamine• a local increase in pH• an increase in local tissue carbon dioxide• a decrease in local tissue oxygen content• a local increase in adenosine concentration