The Circulatory System : Physiology

Question 1

What is blood pressure/

Answer 1

The pressure of blood exerts against the wall of the arteries

Question 2

What is systole?

Answer 2

When the left ventricle of heart contracts, it pumps blood from the ventricle into the aorta.

Question 3

What is diastole?

Answer 3

When the muscle of the ventricle relaxes, the ventricle fills with blood.

Question 4

What are blood pressure readings?

Answer 4

. Can be measured with a blood pressure cuff (sphygmomanometer)

2. Systolic blood pressure: high point of wave as heart is contracting
3. Diastolic blood pressure: low point of wave as heart is in relaxation phase

Question 5

What is perfusion?

Answer 5

the circulation of blood in an organ or tissue in adequate amounts to meet the current needs of the cells

Question 6

What does blood enter organs and tissue through?

Answer 6

. Blood enters organs and tissues through the arteries and leaves through the veins

Question 7

What is inadequate circulation in adults?

Answer 7

1. The system can adjust to compensate for a small blood loss.
   a. Vessels constrict.
   b. The heart pumps more rapidly.
   
   2. With a large loss, adjustment fails, and the patient goes into shock.

Question 8

what is functions of blood?

Answer 8

1. Perfusion
   
   2. Transporting oxygen
   3. Transporting carbon dioxide
   4. Transporting wastes and nutrients
   5. Clotting (coagulation)