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Muscular System
The muscular system allows humans to move. Muscles also provide strength, balance and heat.
11,239 Questions
What type of muscle is used for heart beating and food digestion?
The smooth muscles in the walls of the digestive system contract to keep food moving through the alimentary canal. In the small intestine, there are circular and longitudinal muscles which together produce the pinching and squeezing movement we call peristalsis.
The heart itself is made of muscle, a special kind called cardiac muscle, and its contractions are what pushes the blood around.
What muscle contraction is used in sprinting?
Unless you are calm , the muscles in your legs tense up and a flow of adrenalin and lactic acid flows in after runing , making it hard to walk.
What portion of the brain controls muscular coordination?
The frontal lobe controls motor functions and permits voluntary muscle control. The brain stem
What are some proposed causes of skeletal muscle fatigue?
I think you are talking about the effect of exercise on the human body. There's two types of respiration humans use, when exercising - aerobic respiration - when oxygen is plenty, thus when you are not panting and getting enough oxygen you are using the kind of respiration. It requires the prescence of oxygen and glucose and produces 38 ATP and carbon dioxide, which is is exhaled. The other respiration, when you are panting and not gettiong enough air, is called anaerobic respiration. It only requires the prescence of glucose and only produces 2 ATP and lactic acid, which attacks your muscles, making you feel fatigued and produces muscle pain. Hope this anmswers your question. Fun Fact: The more time it takes for your body to go into anaerobic respiration, the more fit you are ! :)
How can exercise be bad for the muscular system?
Sprain, Strain, Repetitive movements from a job, illness, disease, injury.
Why do muscles need bones in order for the body to move?
Answer
Though not all muscles work in pairs, the general principle is that one muscle moves a bone one way, and the other muscle moves it the opposite way. Why? Because muscles can only pull, not push.
For example, when you bend your arm, the biceps muscle pulls. When you want to straighten it, the biceps muscle cannot push it back. Instead, the triceps muscle that's on the back of the arm pulls in the other direction.
How do the skeletal and muscular systems work together to move your body?
Muscles are attached to bones by tendons. The muscles contract to allow movement, while the skeleton gives the muscles support. The muscles and bones move together, basically with the muscles contracting and the bones allowing them to stay up.
Something like that.
Which type of muscles are not under voluntary control?
Simple answer:
Smooth muscle and cardiac muscle are the two muscle types not under conscious control.
More detailed answer:
There are three types of muscle tissue: Skeletal muscle, Cardiac muscle and Smooth muscle.
Skeletal muscle is attached to the bones of the skeleton. They form the flesh of the skin and when they contract, they pull on bones and skin, providing body movements. Skeletal muscle is under our conscious control and is called voluntary muscle.
Cardiac and smooth muscle are both involuntary muscles (not under conscious control)
Cardiac muscle, as the name suggests is only found in the wall of the heart. Its contractions help propel the blood from the heart, through the blood vessels to all parts of the body.
Smooth muscle is found mainly in all the hollow organs other than the heart (blood vessels, uterus, and digestive and urinary tract organs. Its main function is to squeeze substances through these organs by alternately contracting and relaxing.
What exact muscles are used when lifting a box?
gastrocnemus, erector spinae, latissimus dorsi, Gluteus maximus,medius, minimus, Biceps femoris, quadricep muscles.
What causes tight painful muscles?
Contracting.
Contracture - is the permanent tightening of fascia, muscles, tendons,
ligaments, or skin that occurs when normally elastic connective
tissues are replaced with nonelastic fibrous tissues.
How is wave summation achieved in vivo?
simply: Wave summation occurs when a second stimulus is applied before relaxation occurs completely.
In depth: In order for a muscle to contract electrical shock or nerve impulse must cause voltage-sensitive tubule proteins (T-tubules) of sarcoplasmic reticulum to change shape and allow Ca2+ into cytosol. Ca2+ binds to troponin (changing its shape) allowing myosin (makes thick filaments) to attach to actin ( makes thin filaments). Myosin pulls itself along actin via ATP hydrolysis, this is called a cross bridge cycle, basically shortening of muscle. Before the contraction stops, another stimulus is sent to the muscle allowing more Ca2+ into the cytosol which keeps allowing cross bridge cycle. wave summation means the contractions are added together. thus increasing the force of the second stimuli. force will increase until the muscle reaches its threshold.
What causes muscle spasm in arms?
Tension in your forearm. Rub it or have someone rub it and it should stop
How does the appearance of smooth muscle differ from that of skeletal mucsle?
They are all in different places.
Skeletal muscles are striated and are the muscles that are in voluntary control. These include biceps(arm), pectoralis major(chest) and other muscles that you can move. These muscles are striated and has many nuclei.
Smooth muscles are not striated and are the muscles that are not in voluntary control. These include organs and blood vessels, excluding heart. These muscles are unstriated with one nucleus. Smooth muscles has only one nucleus.
There is only one place where cardiac muscle is found: the heart. Also called myocardium, this muscle is striated and has one nucleus. Cardiac muscle also contains intercalated disc, which acts as a junction between the two muscle cells.
Fibularis Longus is a muscle on the lateral side of the leg. It originates from the upper 3rd of the fibula and inserts onto the base of the first metatarsal in the foot. Its main functions are powerful eversion of the foot and plantarflexion. Additionally Fibularis Longus is innervated by the tibial nerve.
What muscle defines the lower boundary of the thoracic cavity?
Diaphragm (Take a look at a picture showing the different cavities and it will make sense)
What four muscles help form the abdominal girdle?
External Oblique Internal Oblique Transversus Abdominis REctus Abdominis
What is the largest muscle of the upper back?
Latissimus dorsi - this is the largest back muscle that runs from the lower back to the upper arm bone. It pulls the upper arm towards the body and acts as an internal rotator of the upper arm.
Media provides relaxation by providing?
A. Search Engines
B. Job networks
C. Entertainment
D. Information
The correct answer is C. Entertainment
Why is it more of a strain on the eye muscles to look at close objects than at far objects?
When looking at near objects your eyes constantly need to converge and accommodate. Using these muscles constantly will cause straining in the eyes. Looking at far objects, the eye do not need to converge and accommodate, straining the eye less.
