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When a muscle has used up its normal energy stores, but still needs energy, lactic acid is released into the muscles. Small amounts of lactic acid acts as temporary energy source, helping the body to avoid fatigue. A build-up of lactic acid in the muscles causes a burning sensation in the muscles that can slow down or halt activity.
What else can I help you with?
What type of muscle fiber breaks down lactic acid to produce energy?
The liver will extract lactic acid from the blood stream and convert it into glycogen, a reserve fuel type of energy.
What does lactic acid lower that prevent muscles from contracting?
The increase in lactic acid concentration in the muscle fiber's site doesn't allow the calcium ions flow from the sarcoplasmic reticulum to bind with the troponin of the actin site.Therefore the tropomysin doesn't clear the way from myosin cross-bridges to bind with the troponin which leads to the further muscle contraction.So from that point the entire muscle action ceases, till the lactic acid drains itself to be converted into useful products to be used by the body.But this is only in the case of trained athletes and in case of untrained, sedentary human, the lactic acid concentration takes a leasure-long time to get removed from the site followed by long lasting DOMS (delayed onset of muscle soreness) after any exercise and the opposite action is true in case of trained athletes.
If muscle contractions use ATP at or below the maximum rate of ATP generation by mitochondria the muscle fiber will what?
If muscle contractions use ATP at or below the maximum rate of ATP generation by mitochondria, the muscle fiber will be able to sustain the contraction for a longer period without fatigue, as the ATP production can meet the energy demands of the muscle activity.
What are all muscle cells called?
A single muscle cell is called a muscle fiber.
Each muscle fiber is also called a?
Each muscle fiber is also called a myofiber.
What is the Smaller fiber in a muscle fiber?
Myofibril
Exercise can do what?
make more muscle fiber
What causes muscle spasm?
The short answer is "concentrated lactic acid." Concentrated lactic acid can get trapped in the spindle in the muscle fiber and can not get out. When this lactic acid gets trapped in the muscle spindle the feedback nerves that are protected in the muscle spindle can only send a weak signal to the cerebellum. A weak signal from the feedback nerve to the cerebellum tells the cerebellum to contract a muscle. The feedback nerve is trying to send a strong signal which would tell the cerebellum to relax but because the concentrated lactic acid is trapped in the spindle and interfering with the feedback nerve the correct signal can not get to the brain. As a result the muscle keeps contracting and it never relaxes. The muscles gets stuck in this "bad signal loop" which causes many other problems in the body.
Does increased muscle density mean more myofibrils per muscle fiber?
Yes, it means that you will gain more myofibrils per muscle fiber. A muscle fiber is a muscle cell, and everybody has about the same number. When you train your muscles, they will develop more myofibrils inside the muscle cells. So you cannot change the number of muscle fibers, or cells, but you can change the number of fibers, or myofibrils, inside them. The end result is more muscle density, not more muscle cells.
What is the term for a Smaller fiber in a muscle fiber?
The smaller fiber in a muscle fiber is called a myofibril. A band of tissue that connects bone to bone is called a ligament.
What is the basic unit of muscle?
muscle fiber
What is a single muscle called?
a muscle fiber
