B11 Animals (7) - the cardiac cycle

What is the name of the largest artery leaving the heart?

• The femoral artery
• The pulmonary artery
• The carotid artery
• The aorta

Arteries carry blood __

• Towards the heart

• Away from the heart

• With low oxygen

• With high oxygen

Arterioles have smooth muscle that

• Controls blood flow patterns

• Stops blood flow completely

• Allows blood to return to the heart

• Provides elasticity

Vasoconstriction

• Increases blood flow

• Decreases blood flow

Capillary walls are __ cell layers thick

• 2

• 1

• 3

• 4

What causes water to move from the capillaries to the tissue fluid?

• Active transport
• Low pressure

• High pressure

• Passive transport

Which type of blood vessel has the highest pressure?

• Veins
• Capillaries
• Lymphatic vessels
• Arteries

How is blood flow through capillaries controlled?

• the temperature of the surrounding environment

• the amount of oxygen in the blood

• precapillary sphincters

• force of gravity on the body

What controls the direction of blood flow in veins?

• Valves
• Blood pressure

• The heart

• Nerves

What is it called when the heart contracts?

• Diastole
• Aorta
• Pulmonary artery
• Systole