Compartment syndrome is a serious condition that involves increased pressure in a muscle compartment. It can lead to muscle and nerve damage and problems with blood flow.
Creatine phosphate is an organic compound of creatine and phosphoric acid. that provides a quick source of energy for muscle fibers to contract when they need an initial burst of energy. It is also found in the brain and provides a similar burst of energy for neurons.
What substance in muscle seems able to store oxygen temporarily?
Myoglobin is a protein and has oxygen bound to it. It is located in the muscle fibers and stores oxygen.
How is oxygen usually brought to muscle cells?
Blood carrying oxygen and nutrients is brought directly to the muscle fibers by small arteries called arterioles. 3-5 capillaries branch off from each of these arterioles.
Why is oxygen necessary for muscle contraction?
Your body gets the energy it needs by combining food molecules with oxygen in a process called cellular respiration.
How does muscle continue to contract in the absence of oxygen?
The muscle continues to contract in the absence of oxygen through Glycolysis. Glycolysis is the breakdown of glucose to pyruvic acid in the cytoplasm of a cell. It is called an anaerobic process, because it does not require oxygen.
What is meant by oxygen debt? How is it paid off?
A cumulative deficit of oxygen resulting from intense exercise.
The oxygen debt experience after a burst of activity is paid off by breathing in large amounts of air.
What is meant by muscle fatigue? What causes it?
Muscle fatigue occurs when the muscles cannot exert normal force, or when more effort than normal is required to achieve a desired level of force.
There are a number of causes for muscle fatigue, ranging from exercise-induced fatigue to genetic conditions which lead to muscle weakness.
Threshold stimulus a stimulus that is just strong enough to evoke a response.
All-or-none response the threshold response of each particular nerve cell and muscle fiber to a stimulus. A nerve cell will fire completely or not at all, and a muscle fiber will contract to its limit with a stimulus; both rest fully in the absence of stimulus.
What are concentric and eccentric muscle contractions?
Concentric Contractions muscle actively shortening.
When a muscle is activated and required to lift a load which is less than the maximum tetanic tension it can generate, the muscle begins to shorten. Contractions that permit the muscle to shorten are referred to as concentric contractions. An example of a concentric contraction in the raising of a weight during a bicep curl.
Eccentric Contractions muscle actively lengthening.
During normal activity, muscles are often active while they are lengthening. Classic examples of this are walking, when the quadriceps (knee extensors) are active just after heel strike while the knee flexes, or setting an object down gently (the arm flexors must be active to control the fall of the object).
Hypertrophy abnormal enlargement of a body part or organ.
Atrophy a decreases in size of an organ caused by disease or disuse.
Creatine phosphate is an organic compound of creatine and phosphoric acid. that provides a quick source of energy for muscle fibers to contract when they need an initial burst of energy. It is also found in the brain and provides a similar burst of energy for neurons.
What substance in muscle seems able to store oxygen temporarily?
Myoglobin is a protein and has oxygen bound to it. It is located in the muscle fibers and stores oxygen.
How is oxygen usually brought to muscle cells?
Blood carrying oxygen and nutrients is brought directly to the muscle fibers by small arteries called arterioles. 3-5 capillaries branch off from each of these arterioles.
Why is oxygen necessary for muscle contraction?
Your body gets the energy it needs by combining food molecules with oxygen in a process called cellular respiration.
How does muscle continue to contract in the absence of oxygen?
The muscle continues to contract in the absence of oxygen through Glycolysis. Glycolysis is the breakdown of glucose to pyruvic acid in the cytoplasm of a cell. It is called an anaerobic process, because it does not require oxygen.
What is meant by oxygen debt? How is it paid off?
A cumulative deficit of oxygen resulting from intense exercise.
The oxygen debt experience after a burst of activity is paid off by breathing in large amounts of air.
What is meant by muscle fatigue? What causes it?
Muscle fatigue occurs when the muscles cannot exert normal force, or when more effort than normal is required to achieve a desired level of force.
There are a number of causes for muscle fatigue, ranging from exercise-induced fatigue to genetic conditions which lead to muscle weakness.
Threshold stimulus a stimulus that is just strong enough to evoke a response.
All-or-none response the threshold response of each particular nerve cell and muscle fiber to a stimulus. A nerve cell will fire completely or not at all, and a muscle fiber will contract to its limit with a stimulus; both rest fully in the absence of stimulus.
What are concentric and eccentric muscle contractions?
Concentric Contractions muscle actively shortening.
When a muscle is activated and required to lift a load which is less than the maximum tetanic tension it can generate, the muscle begins to shorten. Contractions that permit the muscle to shorten are referred to as concentric contractions. An example of a concentric contraction in the raising of a weight during a bicep curl.
Eccentric Contractions muscle actively lengthening.
During normal activity, muscles are often active while they are lengthening. Classic examples of this are walking, when the quadriceps (knee extensors) are active just after heel strike while the knee flexes, or setting an object down gently (the arm flexors must be active to control the fall of the object).
Hypertrophy abnormal enlargement of a body part or organ.
Atrophy a decreases in size of an organ caused by disease or disuse.