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Muscular System
The muscular system allows humans to move. Muscles also provide strength, balance and heat.
11,239 Questions
What muscles are used for expiration?
The primary muscle used in active expiration is the diaphragm (it
relaxes from its contracted state to decrease the volume in the lungs, forcing air out).
Internal intercostals, the interosseous portion, will assist by pulling the rib cage down.
What are the longitudinal bundles in the cytoplasm of a skeletal?
If you're looking for the answer for Medical Mayham it's myofibril.
What muscle expand chest cavity upward during inspiration?
The diaphragm (a sheet of muscle underneath the ribcage) and intercostal muscles (located between your ribs).
The lactate is taken to the liver and converted back to pyruvate.
What controls involuntary muscles?
the answer is...................................................................................................................................................................................................................................................................................idont know
What is the opposing muscle of the bicep?
bicep- it bends the arm while the triceps straighten the arm.
What is the name of the irregular collagen sheath that surrounds each individual muscle fiber?
Individual muscle fibers are surrounded by a connective tissue covering called the Endomysium.
Solomon, E. P. (2009). Introduction to human anatomy and physiology (3rd ed.). St. Louis, Mo.: Saunders/Elsevier.
What nerve must be avoided when giving injections in the buttock muscles?
The sciatic nerve, which is the largest nerve in the body.That is why injections are ususally given in the gluteus medius, in order to avoid the sciatic nerve.
What are the Fast twitch muscles and slow twitch muscles?
Fast twitch muscle fibres are ones used for sudden bursts of physical activity, such as sprinting or weight lifting. Slow twitch muscle fibres meanwhile are designed for extended periods of contraction, such as keeping a person's head supported or maintaining a standing posture.
Physiological differences between the two fibres are largely down to their different energy requirements. Slow twitch fibres have more surrounding capillaries, more mitochondria and a larger amount of myoglobin within the muscle (causing them to be red in color). Meanwhile fast twitch fibres have a store of glycogen to provide a quick burst of energy when the muscles come into action.
When muscles contracts it becomes shorter and thicker?
Muscle cells are also known as muscle fibres. A muscle fibre is made up of myofibrils. The myofibrils are made of many myofilaments. When myofilaments are stimulated by a nerve impulse they slide over each other contracting or shortening the muscles.
How do cardiac muscle cells die?
From a lack of blood flow which is usually caused by some kind of blockage. If the muscle cells can't get blood, they can't get oxygen and they start to die. This is call necrosis. If the lack of blood last long enough a heart attack will occur.
A heart itself is a muscle of our body. Hearts anatomy includes the ducts, veins, arteries and other canals.It do have muscles,base on its physical appearance. It has a voluntary and involuntary muscles for its movement.
When a muscle is not used and it grows smaller that is called?
Disuse of a muscle causes atrophy, which is a shrinking of muscle fibers leading to weakness. With use, the atrophy can be reversed.
An EKG, or electrokardiogram (the German spelling is where the abbreviation comes from), measures the electrical activity of the heart. The waves are called P, Q, R, S, T, and occasionally U (an abnormality). The "spike" is called the QRS Complex.
Why does muscles have a refractory period?
it the period when an action potential cannot be elicited in an excitable cell(neuron,muscle cell etc.) after it has been excited.
What type of muscle tissue is diaphragm?
These include the skeletal muscles which are under voluntary control and are made of striated muscle tissue, the visceral muscles which are under involuntary control and are made of smooth muscle tissue, and cardiac muscle tissue which is found only in the heart. Cardiac muscle tissue has properties in common with each of the other two types.
Sierra Q
What do striations muscles look like?
Striations are light and dark bands on skeletal and caridac muscle fibers. Smooth muscle lacks striations
Explain why fermentation takes place within human muscle cells?
In the absence of the gas oxygen, certain living things are capable of breaking down carbohydrates (starches and sugars) to form alcohol and carbon dioxide gas. This process is known as anaerobic respiration or fermentation, and it has been used for centuries in the production of certain foods and beverages.
Which type of muscle tissue responds the fastest to stimulations to contract?
The answer is smooth muscle.
The muscle tissue of a fully active brain will reproduce instantaneously; if damaged during exercises, as the brain has the most potential, and is fully alert of all of its operation perimeters: when performing at full power, and processing within parameters!
What shape are skeletal muscle fibers?
Each fiber is actually a muscle cell. They are found in bundles that form what we call muscles. These are also called skeletal muscles because when they contract and get shorter, the bones that they are attached to, move. And the bones are part of the skeletal system.
Is yawning a voluntary use of muscle?
The muscles that are used in the process of smiling are the face muscles. There are twelve muscles that help the face to smile, a couple of them are, the Zygomaticus major and minor and the Levator anguli oris. There are of course 9 more that are included in the smile process.
It is not clear exactly how many muscles are used when smiling. Some of the muscles used for smiling are the levator anguli oris, the levator labii superioris, the orbicularis oculi, the risorius, the zygomaticus major and minor.
