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What are the types of muscle spindles?

What are the types of muscle spindles?

Muscle spindles are ubiquitous encapsulated mechanoreceptors found in most mammalian muscles. There are two types of endings, primary and secondary, and both are sensitive to changes in muscle length and velocity, with the primary endings having a greater dynamic sensitivity.

What happens when the muscle spindle is stretched?

When muscles lengthen, the spindles are stretched. This stretch activates the muscle spindle which in turn sends an impulse to the spinal cord. This impulse results in the activation of more motor neurons at spinal level that send an impulse back to the muscle.

What is the function of muscle spindle?

Functionally, muscle spindles are stretch detectors, i.e. they sense how much and how fast a muscle is lengthened or shortened [19]. Accordingly, when a muscle is stretched, this change in length is transmitted to the spindles and their intrafusal fibers which are subsequently similarly stretched.

What do muscles grow in response to being stretched?

As the sarcomere contracts, the area of overlap between the thick and thin myofilaments increases. As it stretches, this area of overlap decreases, allowing the muscle fiber to elongate. The more fibers that are stretched, the greater the length developed by the stretched muscle.

How does a muscle respond to a held stretch?

Anatomy of the Stretch Reflex If a muscle is stretched (lengthened) too far or too quickly the muscle spindles are excited and the stretch reflex is activated, which causes the muscles to contract, thereby protecting the muscle from being over stretched or torn.

What happens when you stretch a muscle?

Stretching keeps the muscles flexible, strong, and healthy, and we need that flexibility to maintain a range of motion in the joints. Without it, the muscles shorten and become tight. Then, when you call on the muscles for activity, they are weak and unable to extend all the way.

What is it called when one muscle contracts the antagonist muscle relaxes this is referred to as?

In an antagonistic muscle pair as one muscle contracts the other muscle relaxes or lengthens. The muscle that is contracting is called the agonist and the muscle that is relaxing or lengthening is called the antagonist.

What are examples of antagonistic hormones?

Antagonistic Hormones

  • Beta cells secrete insulin. When the concentration of blood glucose rises (after eating, for example), beta cells secrete insulin into the blood.
  • Alpha cells secrete glucagon. When the concentration of blood glucose drops (during exercise, for example), alpha cells secrete glucagon into the blood.

What is another word for antagonistic?

Antagonistic Synonyms – WordHippo Thesaurus….What is another word for antagonistic?

hostile inimical
unfriendly unsympathetic
ill-disposed adversarial
adversary against
incompatible inhospitable

What are the 3 types of antagonists?


  • The malevolent villain.
  • The ally-antagonist.
  • The interfering authority figure.
  • The force of nature.
  • The inner saboteur.

Can an antagonist be the main character?

While there can be villainous protagonists, villains are antagonists when they’re not the main character of the story but instead are the main source of conflict for the main characters.

What is C * * * * * figure of speech?

Climax Definition. Climax is a figure of speech in which successive words, phrases, clauses, or sentences are arranged in ascending order of importance, as in “Look! Up in the sky! It’s a bird!

What makes a good climax?

Another effective way to build your novel’s climax is to structure scene and chapter breaks for effect. For example, if you have multiple character arcs, try alternating between shorter scenes. Short scenes alternating between characters travelling to the same place (or seeking the same or opposite goals) add tension.

What is the importance of climax?

Why Is a Climax Important? A story begins with an inciting incident—an event that ignites the primary conflict and sets a protagonist on their journey. The rising action is the increasing intensity of the conflict, creating a build-up of tension. The climax is there to release that tension.

Why is the climax the most important part of a story?

A climax, when used as a plot device, helps readers understand the significance of the previously rising action to the point in the plot where the conflict reaches its peak. The climax of the story makes readers mentally prepared for the resolution of the conflict.

Can the climax of a story be at the end?

Does the climax have to be at the end? No, but it should be. The climax is the most exciting, upsetting or amazing moment in your story. With the whole novel to build up their involvement and bring plot elements together, the end of your novel is the natural home of the climax.

What is the most exciting part of the story?