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What is a motor nerve?
A motor nerve sends an impulse to certain muscles cells to make them contract. The group of muscle cells and the nerve is called a motor unit. Another Answer: In the field of anatomy and physiology, motor nerves are the ones that transmit impulses, called action potentials, from the central nervous system (brain and spinal cord) to skeletal muscles. Sometimes motor nerves send messages that are voluntary or reflexive in order to make muscles contradict or inhibit muscle contraction.Answer A motor nerve is a kind of nerve that carries impulses from the central nervous system that trigger muscles to contract. It also allow to the brain to stimulate muscle contraction. Motor nerve is also called an efferent nerve that exclusively contains the axons of somatic and branchial motoneurons.
Bodily movement produced by skeletal muscles is called?
Skeletal muscles are attached to the bones by tough cords called tendons. When nerve signals are sent from the brain and spinal cord, these muscles contract to produce movement.
The axon terminals of a nerve cell and the sarcolemma of a skeletal muscle cell join at the?
The axon terminals of a nerve cell and the sarcolemma of a skeletal muscle cell join at the neuromuscular junction. This is where the nerve impulse triggers the release of neurotransmitters, such as acetylcholine, which initiate muscle contraction by binding to receptors on the sarcolemma.
Why does the gastrocnemius muscle contract after stimulating the sciatic nerve?
The gastrocnemius is stimulated by a branch of the sciatic nerve called the tibial nerve. This causes contraction and produces plantar flexion of the foot. When a person stands on their "tippy toes" that is plantar flexion. This is a function of this nerve.
Which of the stimuli resulted is the most effective nerve stimulation?
Electrical stimulation is typically the most effective method for nerve stimulation as it can directly trigger action potentials in the nerve fibers. Light and chemical stimuli can also stimulate nerves but are generally not as precise or efficient as electrical stimulation.
The first step toward generating a skeletal muscle contraction is The first step toward generating a skeletal muscle contraction is?
stimulation of the muscle by a nerve ending.
The first step toward generating a skeletal muscle contraction?
stimulation of the muscle by a nerve ending.
Why does repetitive nerve stimulation result in decreased amplitude of the muscle contraction?
The destruction of ACh receptors makes skeletal muscle less responsive to nerve stimulation and more likely to prematurely fatigue. With fewer ACh receptors available to bind to ACh, the skeletal muscle cell membrane potentials have a more difficult time reaching the threshold potential and initiating contraction. Thus, the normal degree of fatigue noted during repetitive nerve stimulation is exacerbated in an individual with myasthenia gravis.
What motor nerve do?
Motor nerves allow the brain to stimulate muscle contraction. A motor nerve is an efferent nerve that exclusively contains the axons of somatic and branchial motoneurons, which innervate skeletal muscles (that ensure locomotion) and branchial muscles (that motorize the face and neck).
What qualities do cardiac and skeletal muscles share?
Cardiac and skeletal muscles are both striated muscles that contract in response to nerve impulses. They contain sarcomeres as their basic contractile unit and rely on the presence of calcium ions for muscle contraction. Additionally, both types of muscles are composed of muscle fibers that vary in size and length.
What is required to accomplish a strong contraction?
To accomplish a strong contraction in muscles, it is important to activate the motor units within the muscles. This can be done through proper nerve stimulation, which is provided by the brain and nervous system. Additionally, having sufficient muscle strength and adequate fuel supply, such as ATP, are necessary for a strong contraction.
What nerve innervates the visceral muscles of the stomach causing contraction and hence motility?
The Vagus Nerve.
How is a reflex nerve impulse different than other nerve impulses?
Skeletal muscles interact with the spinal cord
How the muscle of the heart different from other muscle of the heart?
The heart muscle is different from smooth and skeletal muscles because it does not require a nerve to cause it to contract. The heart has it's own built in conduction system that cause's the automatic contraction and relaxation that is required for circulation. Smooth and Skeletal muscle whether it uses voluntary or involuntary muscle contraction all have innervation to cause the contraction. Sara, RN
Teutonic contraction of skeletal muscles caused by what?
It seems there are a few causes, but the most obvious is motor nerve stimulation. When you search "tetanic contrations" it will sum up some possible causes, including adverse drug reactions, parathyroid activity, and electronic muscle simulation (muscle toners). It says that if the stimuli to the nerves is delivered slow enough, then the muscles will relax between switches in the nerve... My fiancee is experiencing this as I type, so if you have found out what helps, please reply! :) Much luck and good health, thanks!
Is a diagnostic test that measures the electrical activity within muscles fibers in response to nerve stimulation?
Electromyography
Where do nerve impulses first stimulate a skeletal muscle fiber?
The motor nerve cells control the skeletal muscle
