Cardiovascular System and Blood Flow Control Quiz

What is the primary role of arterioles in the cardiovascular system?

• To store blood for future use

• To affect total peripheral resistance and control blood pressure

• To transport oxygenated blood to the heart

• To remove waste products from the blood

Which of the following is NOT a metabolite that causes vasodilatation in arterioles during exercise?

• Carbon dioxide

• Lactic acid

• Oxygen

• Adenosine

What happens to blood flow in the body when you are exercising?

• Blood flow remains constant

• Blood flow to the brain increases significantly

• More blood is sent to the gut

• More blood is sent to the muscles

What is the role of the sympathetic nervous system during exercise?

• To cause constriction of blood vessels to the gut

• To cause vasodilatation in all arterioles

• To increase heart rate only

• To decrease blood pressure

What could happen if all arterioles in the muscles dilate at once during exercise?

• Blood flow to the muscles would decrease

• Blood pressure could drop

• The heart would stop

• Total peripheral resistance would increase

Which ion released during muscle contraction contributes to vasodilatation?

• Chloride

• Calcium

• Sodium

• Potassium

What is the analogy used to describe the balance between local and central control of blood flow?

• A family and its members

• A company and its departments

• A city and its local and central government

• A school and its classrooms

What is a potential consequence if muscles do not receive enough blood during exercise?

• Muscles will increase in temperature

• Muscles will stop contracting

• Muscles will go anaerobic and produce lactic acid

• Muscles will become stronger