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How do haematocrit levels change during and after exercise?
Haematocrit levels usually increase during and after exercise due to higher blood pressures forcing fluid out of cells therefore reducing plasma volume and producing a false haematocrit reading.
How is the reduction of plasma alanine concentration caused by gluconeogenesis?
Alanine is the major gluconeogenic amino acid. Plasma alanine is used to make glucose in the liver (Glucose-Alanine Cycle), and thus when this occurs plasma alanine concentration is decreased.
When low oxygen levels occur during exercise and glucose is converted into what stable end products?
pyruvic acid
Why is glycogen converted back into glucose when exercising?
During exercise, the body requires a quick and readily available source of energy to fuel muscle activity. Glycogen, a stored form of glucose in the liver and muscles, is converted back into glucose to meet this demand. This process provides a rapid release of glucose into the bloodstream, ensuring that muscles have the necessary energy to sustain physical activity. Additionally, converting glycogen to glucose helps maintain blood sugar levels during prolonged or intense exercise.
What does the fuel for muscles comes from?
The primary fuel source for muscles during exercise is glucose, which is derived from carbohydrates in the diet. Once stored glucose is depleted, the body can also use stored fat for energy through a process called lipolysis. Additionally, during prolonged exercise, muscles can rely on protein breakdown for energy.
How does epinephrine and norepinephrine affect plasma glucose and why is it important during exercise?
Epinephrine and norepinephrine increase plasma glucose levels by stimulating glycogenolysis and gluconeogenesis in the liver, as well as promoting the release of glucose from adipose tissue. This elevation in blood glucose is crucial during exercise, as it provides a readily available energy source for working muscles. Additionally, these hormones enhance the mobilization of fatty acids, which further supports energy production during prolonged physical activity. Together, they ensure that the body meets the heightened energy demands of exercise.
Does plasma increase or decrease with altitude training?
Plasma volume typically increases with altitude training due to the body's adaptive response to the lower oxygen levels at higher altitudes. This increase in plasma volume helps improve oxygen delivery to the muscles during exercise, which can enhance endurance performance.
What is the goal of hydration during exercise?
to maintain plasma volume
Why intravascular plasma increases during exercise?
bone stimulation
How do haematocrit levels change during and after exercise?
Haematocrit levels usually increase during and after exercise due to higher blood pressures forcing fluid out of cells therefore reducing plasma volume and producing a false haematocrit reading.
What happened to the plasma levels of carbon dioxide during exercise why?
it increases
Explain what effects the changes in insulin concentration have on glucose mobilization during exercise?
During exercise, changes in insulin concentration can affect glucose mobilization by stimulating glucose uptake in muscles. When insulin levels decrease during fasting or intense exercise, there is reduced inhibition of glycogen breakdown and increased release of glucose from the liver to maintain blood glucose levels. Conversely, high insulin levels during rest or fed state promote glucose uptake by tissues, decreasing reliance on liver glucose release.
Sport drinks contain glucose how does this help with performance?
Glucose is a carbohydrate. Carbohydrates are your main source of energy during exercise. By drinking sports drinks while exercise, you increase the amount of energy your body can use. This allows you to be able to exercise longer or at a higher intensity without fatiging.
What fuel does the body use for energy during exercise?
mechanical energy
What happens during a fasting plasma glucose test?
During a fasting plasma glucose test, a blood sample is taken after a period of fasting (usually 8-12 hours) to measure the amount of glucose in the bloodstream. This test helps diagnose diabetes or assess how well it is being managed. High levels of glucose in the blood can indicate diabetes, while low levels could suggest hypoglycemia.
How is the reduction of plasma alanine concentration caused by gluconeogenesis?
Alanine is the major gluconeogenic amino acid. Plasma alanine is used to make glucose in the liver (Glucose-Alanine Cycle), and thus when this occurs plasma alanine concentration is decreased.
Why do we feel hungry or hungrier after exercise?
During exercise the body depletes its glucose reserves and blood sugar levels fall.
