A&P quiz 8 lecture questione

The sac surrounding the heart is the

Pericardium

Which heart valve controls the flow of blood between the left atrium and the left ventricle?

Mitral valve

Which great vessel supplies blood to the right atrium?

Superior and inferior vena cavae

What is the heart's primary pacemaker?

Sinoatrial (SA) node

Cardiac output equals

heart rate times stroke volume

Veins are called capacitance vessels because:

they can stretch

Capillaries release oxygen and take up carbon dioxide from surrounding tissues through the process of:

Diffusion

Portal systems allow blood to:

pass through two capillary networks before returning to the heart

Which condition would you expect to accompany atherosclerosis?

High blood pressure

When blood pressure suddenly rises, which structure sends out parasympathetic impulses?

The medulla

What forms the basis of lymphatic fluid?

Tissue fluid left behind after capillary exchange

In which lymphatic organ do T cells mature?

Thymus

Which is an important white blood cell that travels throughout the bloodstream seeking out bacteria?

Neutrophil

Which statement about nonspecific immunity is true?

It is present at birth

Which type of immunity uses T cells to destroy pathogens within a cell?

Cellular immunity

1

Sinoatrial (SA) node

2

Interatrial bundle

3

Atrioventricular (AV) node

4

Bundle of His

5

Right and left branches

6

Purkinje fibers