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Which of the following best describes the natural tension found in the fibers of a muscle?
Health Chapter 15 Test review
| A | B |
|---|
| muscle tone | the natural tension found in the fibers of a muscle |
| cartilage | a strong flexible connective tissue found in the nose and outer ear |
| ossification | the process by which bone is formed or renewed |
| ligament | a band of fibrous, slightly elastic connective tissue that attaches bone to bone |
Which muscles help stabilize joint activity?
3. Synergist: The synergist in a movement is the muscle(s) that stabilises a joint around which movement is occurring, which in turn helps the agonist function effectively. Synergist muscles also help to create the movement.
What are the 7 steps of muscle contraction?
Terms in this set (7)
- Action potential generated, which stimulates muscle.
- Ca2+ released.
- Ca2+ binds to troponin, shifting the actin filaments, which exposes binding sites.
- Myosin cross bridges attach & detach, pulling actin filaments toward center (requires ATP)
- Muscle contracts.
What is Glencoe health? – Related Questions
What is muscle fiber tension?
To move an object, referred to as load, the sarcomeres in the muscle fibers of the skeletal muscle must shorten. The force generated by the contraction of the muscle (or shortening of the sarcomeres) is called muscle tension.
What is tension in a muscle?
What is muscle tension? Muscular tension refers to the condition where one or more muscles remains semi-contracted for a prolonged period. This causes small lumps or “muscle knots” which you can feel by touching the affected area.
What is the resting tension in a muscle called?
1: Muscle tension: Muscle tension is produced when the maximum amount of cross-bridges are formed, either within a muscle with a large diameter or when the maximum number of muscle fibers are stimulated. Muscle tone is residual muscle tension that resists passive stretching during the resting phase.
What term is used to describe muscle tension that is created?
What term is used to describe muscle tension that is created without a change in muscle length and no visible movement of the joint? Isometric.
What are the 4 muscle contractions?
Isometric: A muscular contraction in which the length of the muscle does not change. isotonic: A muscular contraction in which the length of the muscle changes. eccentric: An isotonic contraction where the muscle lengthens. concentric: An isotonic contraction where the muscle shortens.
What is the strongest muscle contraction?
The strongest muscle based on its weight is the masseter. With all muscles of the jaw working together it can close the teeth with a force as great as 55 pounds (25 kilograms) on the incisors or 200 pounds (90.7 kilograms) on the molars.
What are the 3 muscle contractions?
There are three types of muscle contraction: concentric, isometric, and eccentric. Labeling eccentric contraction as “contraction” may be a little misleading, since the length of the sarcomere increases during this type of contraction.
What is the weakest muscle contraction?
Concentric muscle contractions are essential for overcoming the force of gravity and performing lifting movements. Finally, we are generally weakest in the concentric phase of a lift.
What triggers muscle contraction?
A Muscle Contraction Is Triggered When an Action Potential Travels Along the Nerves to the Muscles. Muscle contraction begins when the nervous system generates a signal. The signal, an impulse called an action potential, travels through a type of nerve cell called a motor neuron.
What diseases cause muscle contractions?
Dystonia is a neurological movement disorder that results in unwanted muscle contractions or spasms. The involuntary twisting, repetitive motions, or abnormal postures associated with dystonia can affect anyone at any age. The movements can be slow or fast, range from mild to severe and happen predictably or randomly.
What drink stops leg cramps?
It’s been suggested that drinking 2 to 3 ounces of tonic water before bedtime can prevent leg cramps at night.
What fruit is good for leg cramps?
Bananas: A Time-Tested Treatment
You probably know that bananas are a good source of potassium. But they’ll also give you magnesium and calcium. That’s three out of four nutrients you need to ease muscle cramps tucked under that yellow peel. No wonder bananas are a popular, quick choice for cramp relief.
What vitamin helps with leg cramps?
Vitamin B complex.
There is some evidence that taking a daily capsule containing eight B vitamins—B1 (thiamine), B2 (riboflavin), B3 (niacin), B5 (pantothenic acid), B6, B7 (biotin), B9 (folate), and B12—may prevent cramps.
Why does vinegar stop leg cramps?
Acetic acid is postulated to mitigate cramping by decreasing alpha motor neuron activity through oropharyngeal stimulation and inhibitory neurotransmitter production, while aiding in the role acetylcholine plays in muscle contraction and relaxation.
What causes leg cramps at night in seniors?
The older you are, the more likely you are to have leg cramps. This is because your tendons (the tissues that connect your muscles to your bones) naturally shorten as you age. You’re also more likely to get them if you’re a woman. Up to 60% of adults get leg cramps at night, as do up to 40% of children and teenagers.
What do leg cramps at night mean?
Most of the time, no apparent cause for night leg cramps can be identified. In general, night leg cramps are likely to be related to muscle fatigue and nerve problems. The risk of having night leg cramps increases with age. Pregnant women also have a higher likelihood of having night leg cramps.
