Heart - Structure and Function

Question 1

what are the 2 audible sounds of the heart

Answer 1

S1 - Lubb

S2 - Dupp

Question 2

what does S1 - Lubb represent

Answer 2

closure of the AV valves

Question 3

what does S2 - Dupp represent

Answer 3

closure of the SL valves

Question 4

list the 6 pulse points

Answer 4

1. temporal
2. carotid
3. radial
4. ulna
5. popliteal
6. facial

Question 5

define blood pressure

Answer 5

is the force per unit area exerted on a vessel wall by the contained blood, is expressed in millimetres of mercury (mm Hg).

Question 6

what are the the free factors that affect the resistance of blood

Answer 6

1. blood viscosity
2. blood vessel diameter
3. blood vessel length

Question 7

list the electrical and mechanical event of the P wave

Answer 7

electrical - atrial depolarisation

mechanical - atria systole

Question 8

list the electrical and mechanical event of the QRS complex

Answer 8

electrical - ventricular depolarisation

mechanical - ventricular systole

Question 9

list the electrical and mechanical events of the T wave

Answer 9

electrical - ventricular repolarisation

mechanical - ventricular diastole

Question 10

list the 3 branches off of the aortic arch

Answer 10

1. brachiocephalic trunk
2. left common carotid artery
3. left subclavian artery