This topic contains a solution. Click here to go to the answer

Author Question: How can lactate be recycled and reused as an energy source in the ... (Read 73 times)

Cooldude101

  • Hero Member
  • *****
  • Posts: 557
How can lactate be recycled and reused as an energy source in the body?

Question 2

Does the build-up of lactate in the muscles after exercise contribute to muscle soreness? Is there anything else that contributes?



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Fayaz00962

  • Sr. Member
  • ****
  • Posts: 330
Answer to Question 1

Lactate can be recycled into glucose and then reused as an energy source. Muscles release lactate into the blood, where it is circulated to the liver and converted to glucose via gluconeogenesis. Glucose is released into the blood and then taken up by muscles and other tissues. The release of lactate from the muscles into the blood, and its subsequent conversion to glucose by the liver, is called the Cori cycle. The Cori cycle helps increase glucose availability during periods of intense exercise.

Answer to Question 2

Until recently, the accumulation of lactate (lactic acid) in muscles was thought to be the cause of muscle soreness. Although lactate build-up may be associated with acute muscle pain, it does not adequately explain muscle soreness that often lingers for days after a vigorous workout. Scientists now believe that delayed onset muscle soreness, which occurs up to 24 to 36 hours after exercise, may be caused by microscopic tears in muscles in response to new activities or working out with greater intensity. Tiny tears cause muscle inflammation, which in turn causes localized soreness. At the same time, muscle fibers become stronger and better able to resist tearing, and therefore better equipped at handling the same type of exercise in the future.
Though not responsible for muscle soreness, the accumulation of lactate and other intermediate metabolic products does create an acidic environment (a lower pH), which inhibits the activity of enzymes needed for glycolysis. This drop in pH causes muscle contractions to weaken, contributing even more to fatigue and often causing a burning sensation in muscles.



Cooldude101

  • Hero Member
  • *****
  • Posts: 557

Fayaz00962

  • Sr. Member
  • ****
  • Posts: 330

 

Did you know?

Certain topical medications such as clotrimazole and betamethasone are not approved for use in children younger than 12 years of age. They must be used very cautiously, as directed by a doctor, to treat any child. Children have a much greater response to topical steroid medications.

Did you know?

When intravenous medications are involved in adverse drug events, their harmful effects may occur more rapidly, and be more severe than errors with oral medications. This is due to the direct administration into the bloodstream.

Did you know?

Though “Krazy Glue” or “Super Glue” has the ability to seal small wounds, it is not recommended for this purpose since it contains many substances that should not enter the body through the skin, and may be harmful.

Did you know?

Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.

Did you know?

Blood is approximately twice as thick as water because of the cells and other components found in it.

For a complete list of videos, visit our video library