The Cardiovascular System

Question 1

where in the circulatory system has the highest blood pressure?

Answer 1

left ventricle

Question 2

blood flowing around the circulation would encounter these structures in this order…

Answer 2

Right atrium to Tricuspid Valve to Pulmonary Semilunar valve to Mitral Valve to Left Ventricle to Pulmonary Semilunar valve

Question 3

Order for electrical signal generation and conduction of heart.

Answer 3

1. SAN
2. Atria contracts
3. AVN
4. Bundle of His
5. Purkinje fibres

Question 4

contractility…

Answer 4

is the cardiac muscle contractile force due to factors other than end diastolic volume, increases stroke volume if it’s increased, is increased by symp nervous system activity, is increased by epinephrine

Question 5

which hormones are secreted by the heart?

Answer 5

atrial natriuretic peptide

Question 6

If the stroke volume is 80ml, and the heart rate is 70 bpm, cardiac output =

Answer 6

5600 ml/min

Question 7

Cardiac output = (equation)

Answer 7

stroke volume x heart rate

Question 8

when left atrial pressure exceeds left ventricular pressure…

Answer 8

the mitral (bicuspid) valve opens

Question 9

in respect to exchange between the alveoli and the blood…

Answer 9

the partial pressure for oxygen is 64 mmHg and 5mmHg for carbon dioxide because oxygen is less soluble than carbon dioxide

Question 10

what is the primary driving force for the binding of oxygen to haemoglobin

Answer 10

PO2