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The muscle decreases in muscle length during contraction but tension is the same?
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∙ 10y ago
Isotonic contraction
Wiki User
∙ 10y ago
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How does preload affect the stroke volume?
Preload refers to the degree of stretch of cardiac muscle cells before contraction. These muscles exhibit a length-tension relationship. When the cardiac muscle cells are at rest, they are shorter than their optimal length. The most important factor affecting the stretching of cardiac muscles is the venous return, that is, the amount of blood returning back to the heart. Slow heartbeat and exercise can increase the venous return. This will lead to the stretching of the ventricles and it will hence increase the contraction force.As reflected by the Frank-Starling Law, the stroke volume increases with the end diastolic volume. The greater filling volume will lead to the heart to stretch more and this will increase its force of contraction.
What is isometric movement?
Isotonic contraction results in shortening of the muscle, leading to movement. In Isometric contraction, as the name implies, there is no change in length of the muscle. Thus, it can't lead to any movement. However, Isometric contraction adds or removes power from a movement, thus facilitating or retarding it. This, facilitation and retardation itself gives us a feeling of movement, for example walking, even in the total absence of actual movement i.e. walking. This feeling of movement induced by isometric contraction is known as Isometric movement. We use isometric movements in thinking and dreaming.
Length by height or height by length?
Length by height.Addition:About artworks it is always height by length.
How does acetylcholine induce a decrease in heart rate?
Yes it does. Acetylcholine decreases the heart rate. It acts on the muscarinic (m2) receptor which decreases the activity of adenylate cyclase. This in turn decreases the production of cycliac AMP -> decreases the amount of protein kinase a activated -> decreases the amount of calcuim entry -> decreased activity of myocytes in heart- which results in decreased permeability of l type voltaged gated calcuim channels and decreases the length of time they are open for -> decreased calcuim levels -> decreased heart rate.
Why does the blanket im crocheting curve?
It might be one of two problems. You may be adding extra stitches accidentally which will cause a curve because of the added length. But most likely it has to do with your tension. If you don't keep the same amount of tension on the yarn as you crochet, then some stitches will be tighter and some looser. You may be able to fix some of the curving with blocking after you finish the project.
What happens If a muscle is applied to a load that exceeds the muscle's maximum tension?
The muscle length will not change during a contraction.
What is A contraction in which the muscle changes in length with the same tension applied to it?
Isotonic ContractionIsotonic Contraction
A contraction in which there is no change in muscle length but there is a great increase in muscle tension is?
isometric contractions
The type of contraction in which there is a change in the length of a muscle but no change in its tension?
Isotonic is the word you're looking for. Isotonic means the tension remains the same, but the length can change. Isometric means the length remains the same, but the tension can change.
If you change the length of the string will it make the frequency increase or decrease?
increase the length of the string means decrease the tension in the string, therefore as the tension decreases the frequency will drop due to loosen of the string.
Do the you band and H zones become narrower during contraction?
Yes the H band shortens. During contraction the length of the sarcomere or from z line to z line must decrease in length. Thus the I band which is bisected by the z line must shorten as well as the H band, even though the H band is bisected by the A band it must shorten to allow fior this decrease in length. The A band does not shorten because it is composed of the entire length of myosin whose length never decreases during contraction.
Isometric contractions - exercise?
What is isometric exexrcises
What muscle contraction occurs in the biceps brachii during the upward phase of the bicep curl?
a concentric contraction- a concentric contraction involves the muscle length, shortening during a contraction! YA-trick-YA!
What is static muscle contraction?
Contraction in which opposing muscles contract against each other and prevent movement. Fixation action of a muscle in a static contraction is termed isometric, because it develops tension without changing length.
Is tension boomilever stronger than compression boomilevers?
Yes. This is because the strength of wood when compressed, decreases per length unit the longer the piece of wood is. However, wood holds the same strength in tension no matter the length. In the compression boomilever, the compression chord is longer than in the tension boomilever.
Give examples for concentric and eccentric muscle contractions in gait cycle?
while kicking a football, the Quadriceps muscle contracts concentrically to straighten the knee and the Hamstrings contract eccentrically to decelerate the motion of the lower limb.In concentric muscle contraction muscle length decreases along with contraction of the fibres while in eccentric muscle contraction the muscle length increases.Dr Santosh
Which wave length is larger atrial contraction or ventricular contraction?
the ventricular contraction wave is larger
