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A weak stimulus can cause a muscle fiber to contract only partway?
When a weak stimulus is applied to a muscle fiber, only a few motor units are recruited to contract. This results in a partial muscle contraction where not all muscle fibers are activated. Stronger stimuli recruit more motor units, leading to a full muscle contraction.
What is a twitch contraction?
A twitch contraction is a single, brief contraction of a muscle fiber in response to a stimulus. It is the smallest unit of muscle contraction and is not strong enough to produce movement of a limb.
What condition causes increasingly stronger contraction owing to increased stimulus strength?
The condition that causes increasingly stronger contraction owing to increased stimulus strength is called treppe, also known as the staircase phenomenon. This phenomenon occurs when muscle fibers are stimulated rapidly with increasing strength. As a result, the force of contraction increases as the muscle gradually reaches its maximum potential.
What is second stimulus before relaxation causes increased force called?
The phenomenon you are referring to is called the second stimulus before relaxation, which causes increased force, is known as the treppe effect or the staircase phenomenon. This is characterized by the successive increase in muscle contraction force when muscle fibers are stimulated with increasing frequency.
Simple association between stimulus and response is called an?
A simple association between a stimulus and a response is called classical conditioning. This process involves learning to associate a neutral stimulus with a biologically potent one, which results in the neutral stimulus producing the same response.
What is a stimulus that results in no perceptible contration?
subthreshold stimulus
What is the definition of a submaximal stimulus?
A submaximal stimulus refers to an intensity level of a stimulus that is below the maximum level that a system or organism can respond to. It is often used in exercise physiology to describe a workload that does not elicit a maximal performance or physiological response.
What is the minimal level of stimulus to cause a muscle contraction?
it is known as the threshold stimulus usually seen in tonic contraction
The minimum stimulus needed to cause a contraction is called the?
The minimum stimulus needed to cause a contraction is called the threshold stimulus. This is the minimal level of stimulation required to activate muscle fibers and initiate a contraction response.
How does the threshold stimulus influence muscle contraction?
The threshold stimulus is the stimulus required to create an action potential. So any stimulus under this level will not cause muscle contraction, while a stimulus above this level will cause the muscle to contract. The higher the stimulus the more muscle fibers are recruited, and thus the higher the response.
What is the first phase after a stimulus in a muscle contraction?
The first phase after a stimulus in a muscle contraction is excitation-contraction coupling. This involves the transmission of the action potential along the sarcolemma and the release of calcium ions from the sarcoplasmic reticulum.
What does not act as a stimulus to initiate a muscle contraction?
a change of temperature.
A weak stimulus can cause a muscle fiber to contract only partway?
When a weak stimulus is applied to a muscle fiber, only a few motor units are recruited to contract. This results in a partial muscle contraction where not all muscle fibers are activated. Stronger stimuli recruit more motor units, leading to a full muscle contraction.
What type of contraction represented by a single stimulus and relaxation sequence?
Twitch
What is an aftercontraction?
An aftercontraction is a contraction of a muscle some time after a stimulus has ceased.
What is a twitch contraction?
A twitch contraction is a single, brief contraction of a muscle fiber in response to a stimulus. It is the smallest unit of muscle contraction and is not strong enough to produce movement of a limb.
Where are the cells that initiate the stimulus for contraction of the heart muscle located?
SA node
