Campbell Biology 11ed Ch 42 Circulation

Campbell Biology 11ed Ch 42 Circulation

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Multiple Choice

What is happening during atrial and ventricular diastole?

• The heart is relaxed and blood is flowing out

• The heart is contracted and blood is flowing out

• The heart is relaxed and blood is flowing in

• The heart is contracted and blood is flowing in

Multiple Choice

What is happening during ventricular systole?

• The ventricles are relaxed and filling with blood

• The ventricles are contracted and filling with blood

• The ventricles are relaxed and pumping blood out into the arteries

• The ventricles are contracted and pumping blood out into the arteries

Multiple Choice

What is the function of the tendons that hold the atrioventricular valves in place?

• To push the valves shut

• To prevent the valves from turning inside out

• To pull the valves open

• To connect them to the semi lunar valves

Multiple Choice

The sound pattern of the heart is 'lub-dup, lub-dup, lub-dup...' What does the 'lub' represent?

• The recoil of blood against the semilunar valves

• The recoil of blood against the atrioventricular valves

• The valves opening

• The valves closing

Multiple Choice

What is the term given to desrcibe the volume of blood each ventricle pumps per minute?

• heart rate

• stroke volume

• cardiac output

Multiple Choice

Heart rate is measured in...

• strokes per minute

• beats per second

• strokes per second

• beats per minute

Multiple Choice

The pacemaker is a region of the heart called the...

• apex

• septum

• sino-atrial node

• purkinje fibres

Multiple Choice

Cells in the pacemaker are able to

• contract and relax without signals from the nervous system

• survive without mitochondria

• send messages to the brain

Multiple Choice

The Purkinje fibres spread the signal to contract where?

• to the spinal cord

• to the intercostal muscles

• to the ventricles

• to the atria

Multiple Choice

The parasympathetic division of the nervous system has what effect on the heart rate?

• None

• Speeds it up

• Slows it down

Multiple Choice

The pacemaker can be affect by:

• the sympathetic nervous system

• hormones

• temperature changes

• all of these options

Multiple Choice

What type of blood vessel is this?

• Artery

• Vein

• Capillary

Multiple Choice

What is the inner layer of cells known as?

• muscle

• lumen

• epithelium

• endothelium

Draw

Identify the blood vessels

Multiple Choice

Why are capillary walls one cell thick?

• so they can fit in small spaces

• to allow bacteria and viruses spaces to move out of blood vessels

• to allow fluid containing oxygen, glucose and other substances to leak out of the blood in capillary beds

Fill in the Blank

Blood pressure is highest in ______________

Multiple Choice

blood velocity is lowest in

• venules

• arterioles

• capillaries

• veins

Multiple Choice

Vasodilation ___________ blood pressure

• decreases

• increases

Multiple Choice

What is a pulse?

• The sound of the heart beat

• The bulging of artery walls in time with the heart beat

• The lub-dup of the blood hitting the valves

• The contraction of the cells in the SA node