BIO 202 Exam 2

Would you live on a different planet?

Yes? No? Maybe?

Tags

NGSS.MS-ESS1-2

NGSS.MS-LS1-5

What is the function of the heart?

• It pumps oxygen to all parts of the body.

• It keeps blood circulating all round the body.

• It pumps oxygen into the lungs.

• It releases carbon dioxide out into the air.

Which layer contains cardiac muscle?

• Epicardium

• Myocardium

• Endocardium

• Pericardium

Blood will always go from the atria to the ventricles, and ventricles to the vessels.

• true

• false

What ion maintains contraction and allows a plateau during an action potential of myocytes?

• Na

• K

• Ca

• Cl

Isovolumetric contraction: all valves closed &ventricles are contracting but no change in amount of blood volume.

• true

• false

Systolic blood pressure comes from_____

• Low pressure from relaxation of the left atria

• Low pressure from relaxation of the right ventricle

• High pressure from contraction of the right atria

• High pressure from contraction of the left ventricle

QRS wave showing the electrical component of the cardiomyocytes occurs first then the ventricles can contract.

• true

• false

Tags

NGSS.HS-PS2-5

This is called the natural pacemaker of the heart. what am I?

• SA Node

• AV Node

• Bundle of His

• Purkinje Fibers

The Lubb Dubb comes from:

• Flow of blood through the vessels

• Valves closing

• The heart skipping beats

• Flow of blood through the chambers