Blood Circulation

Question 1

What do neural controls of the peripheral system do?

Answer 1

Alter blood distribution to meet specific tissue demands and maintain adequate MAP by altering blood vessel diameter.

Question 2

How do hormones affect blood pressure?

Answer 2

Chemicals, both endocrine and paracrine, influence blood pressure by acting on vascular smooth muscle or the vasomotor center.

Question 3

Describe the cardiac cycle

right side

Answer 3

Vena cava-> right atrium-> tricuspid valve-> Right ventricle

Question 4

Describe the cardiac cycle (left side)

Answer 4

Pulmonary vein-> Left atrium -> mitral valve-> left ventricle

Question 5

Which side of the heart pumps blood at a higher pressure?

Answer 5

The left ventricle operates at 5x higher pressure than the right ventricle

Question 6

What is the dicrotic notch?

Answer 6

When blood is forced into the major arteries, the walls are stretched

Question 7

Where does most of the filling of the ventricle occur?

Answer 7

In the first third of the diastole which gives scope for increases in heart rate

Question 8

What are the requirements of electrical conduction on the cardiac cycle?

Answer 8

Left and right atria must contract synchronously
Left and right ventricles must contract synchonously
Ventricles must contract atria