Increased Muscular Activity Results in a Decreased Partial Pressure of Oxygen
Increased muscular activity results in a decreased partial pressure of oxygen, an increased partial pressure of carbon dioxide, a reduced PH, and an increased temperature. Consequently as much as 73% of the oxygen picked up by haemoglobin in the lungs is released in skeletal muscles during periods of physical exercise.
Utilisation
When we inhale air, oxygen is transported to the lungs and can be utilised by the body to stay alive. Oxygen is used to produce ATP for energy “the principle energy transferring molecule in living systems”(Anatomy and Physiology, Seeley, Stephens, Tate). Oxygen is essential to produce ATP. Internal respiration refers to the intracellular metabolic processes carried out within the mitochondria, which use O2 and produce CO2 during the derivation of energy from nutrient molecules. It involves the exchange of gases within the body. Blood vessels serve as the passageways through which blood is directed and distributed from the heart to all parts of the body and oxygen is then used within the body. Vasoconstriction and vasodilatation play an important part in this. Vasodilatation refers to enlargement in the circumference and radius of a vessel as a result of relaxation of its smooth muscle layer. Vasodilatation leads to decreased resistance and increased blood flow through that vessel. If a muscle needs more oxygen, then the vessel will dilate and increase blood flow to that area. Vasoconstriction has the opposite effect. The smooth muscle layer contracts, the vessels circumference becomes smaller, and this increases resistance and decreases blood flow to that area when a person is exercising or breathing heavily after exercise. The necessity for the elevated O2 uptake during recovery from exercise is due to a variety of factors. The best known is repayment of oxygen debt that as incurred during exercise, when ATP was supporting contractile activity derived from no oxidative sources such as creatine phosphate and anaerobic glycolysis.
Utilisation
When we inhale air, oxygen is transported to the lungs and can be utilised by the body to stay alive. Oxygen is used to produce ATP for energy “the principle energy transferring molecule in living systems”(Anatomy and Physiology, Seeley, Stephens, Tate). Oxygen is essential to produce ATP. Internal respiration refers to the intracellular metabolic processes carried out within the mitochondria, which use O2 and produce CO2 during the derivation of energy from nutrient molecules. It involves the exchange of gases within the body. Blood vessels serve as the passageways through which blood is directed and distributed from the heart to all parts of the body and oxygen is then used within the body. Vasoconstriction and vasodilatation play an important part in this. Vasodilatation refers to enlargement in the circumference and radius of a vessel as a result of relaxation of its smooth muscle layer. Vasodilatation leads to decreased resistance and increased blood flow through that vessel. If a muscle needs more oxygen, then the vessel will dilate and increase blood flow to that area. Vasoconstriction has the opposite effect. The smooth muscle layer contracts, the vessels circumference becomes smaller, and this increases resistance and decreases blood flow to that area when a person is exercising or breathing heavily after exercise. The necessity for the elevated O2 uptake during recovery from exercise is due to a variety of factors. The best known is repayment of oxygen debt that as incurred during exercise, when ATP was supporting contractile activity derived from no oxidative sources such as creatine phosphate and anaerobic glycolysis.