Cardiovascular system

Increase in diameter of blood vessels, decrease the resistance to the area supplied by the vessels Is known as...

• Vasoconstriction

• Vasodilation

• Thermoregulation

There are two systems that circulate blood, they are known as...

• Bicuspid system

• Systemic system

• Pulmonary system

• Coronary system

The blood vessels responsible for vasodilation and vasoconstriction are the...

• Arteries

• Veins

• Arterioles

• Venuoles

The blood pressure in Veins is lower than other blood vessels due to ....

• their distance from the heart

• Wider lumen

• Their flexibility

• Calmness

What are the characteristics of capillaries that aid diffusion? Tick all that are correct

• Their walls are very thin, only one cell thick.

• They are have very narrow lumen

• They have a greater density than other blood vessels

• They are very flexible.

The return of blood flow to the heart is known as ..

• Venous return

• Muscle pump

• Pocket valves

• Suction effect

To return blood back to the heart the veins have what to prevent back flow of blood

Blood flow x Peripheral resistance is the equation for what?

During systole the heart is...

• Contracting

• Relaxing

• Vibrating

Diastolic pressure is lower than systolic pressure.

• True

• False