Sem 1 Year 2 Flashcards
How is oxygen transported in the blood?
Dissolved in octogenarian (2%)/ bound to haemoglobing (98%) which is found in our red blood cells.
Haemoglobin (Hb) is an iron containing globular protein that increases the carrying capacity of the blood by 65-70 times.
What’s the 1st stage involved in blood Ph regulation during exercise performed above the lactate threshold?
Decrease in muscle and blood pH overtime
First line of defence = muscle intracellular proteins (60%)
muscle bicarbonate 20 to 30%
muscle phosphate 10 to 20%
But muscle buffering is limited
Define mechanical work
Movement that required muscle contraction
Define chemical work
Anatolian and catabolism that require energy
For example, make up the cells and tissues of the body
Define transport work
The active transport of substance around the body that requires energy
What’s the 6 forms of energy
Chemical Electrical Electromagnetic Thermal Mechanical Nuclear
What’s substrate in the body would provide the highest quantity of energy?
Fat
What’s the SI unit for energy?
Joules (J)
Work = force x?
Work = force x distance
Power =?/time
Power = work/ time
Calculate work come for this exercise?
Power output = 200W / 10minutes
Total work done = 200 x 10 x 60 = 120,000 J = 120 kJ
Work =?
Work = force x Distance
List the intrinsic electrical stimulation pathway of the cardiac muscle?
Sino atrial node
Atrioventricular node
AV bundle
Purkinje fibres
Define ejection fraction
The fraction of blood ejected by the ventricle relative to its end-diastolic volume
How do you calculate ejection fraction
EF = stroke volume / end diastolic volume
