lecture 5 - cardiorespiratory physiology

Question 1

what is cardiorespiratory physiology?

Answer 1

o2 utilisation and transfer - what is the process that increases energy demand

Question 2

what is creatine kinase reaction?

Answer 2

more phosphocreatine than atp in the muscles - protein splits to become phosphate and creatine
immediate means of regenerating atp

Question 3

what is glycolysis?

Answer 3

breakdown of glucose or glycogen, generating ATP. This occurs quickly and does not require oxygen.

Question 4

what is the o2 cascade from atmosphere to mitochondria?

Answer 4

need to get o2 into the lungs - o2 binds to haemoglobin and it gets transported round the body, once it gets to the peripheral tissues it diffuses into the mitochondria, generates atp to power muscle contractions

Question 5

what is hypoventilation?

Answer 5

arterial o2 saturation is decreased - not able to get enough air into the alveoli - reduces haemoglobin saturation uptake, pressure gradient becomes smaller

Question 6

what are the determinants of VO2 max?

Answer 6

pulmonary ventilation, aerobic metabolism, hemoglobin conc, peripheral blood flow, blood vol and cardiac output

Question 7

what factors limit VO2max?

Answer 7

pulmonary diffusing capacity, o2 carrying capacity, skeletal muscles

Question 8

what are factors affecting VO2 max?

Answer 8

mode of exercise, state of training, sex, age, body size and composition