Question: Which Cranial Nerves Assist With The Manipulation Of The Jaw During Chewing And Speech?

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Which cranial nerves assist with the manipulation of the jaw during chewing and speech select all that apply?

In the pons, the reticular formation is large and contains the circuitry for manipulating the jaw during chewing and speech. Cranial nerves VIII, VII, and VI have their origin in the pons.

What happens during the depolarization phase of nerve cells quizlet?

What happens during the depolarization phase of nerve cells? It is an undisturbed period of the action potential during which the nerve is not transmitting impulses. The cell membrane decreases its permeability to sodium. The neurons are stimulated to fire.

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Which of the following physiologic principles would be considered a function of the somatic nervous system?

1. Which of the following physiologic principles would be considered a function of the somatic nervous system? Rationale: The somatic nervous system provides sensory and motor innervation for all parts of the central nervous system (CNS) and peripheral nervous system (PNS) except viscera, smooth muscle, and glands.

Which cranial nerve pair is the only one to serve structures outside the head and neck?

25)Which cranial nerve pair is the only one to serve structures outside the head and neck? Vagus nerves.

Which muscle helps to open the jaw?

The masseter muscle is one of the four muscles responsible for the action of mastication (chewing). When the masseter contracts it causes powerful elevation of the mandible causing the mouth to close.

What are the 4 muscles of mastication?

There are four muscles:

  • Masseter.
  • Temporalis.
  • Medial pterygoid.
  • Lateral pterygoid.

What happens during the depolarization phase of nerve cells?

Depolarization occurs when a stimulus reaches a resting neuron. During the depolarization phase, the gated sodium ion channels on the neuron’s membrane suddenly open and allow sodium ions (Na+) present outside the membrane to rush into the cell.

What happens during the depolarization phase of nerve cells Group of answer choices?

The depolarization, also called the rising phase, is caused when positively charged sodium ions (Na+) suddenly rush through open voltage-gated sodium channels into a neuron. As additional sodium rushes in, the membrane potential actually reverses its polarity.

What is the difference between a nerve cell at the end of repolarization?

Answer: The only difference between the end of the repolarization phase and the resting state is that the sodium and potassium ions are on the opposite sides from where they began.

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What are the two principal divisions of the nervous system?

The nervous system has two main parts:

  • The central nervous system is made up of the brain and spinal cord.
  • The peripheral nervous system is made up of nerves that branch off from the spinal cord and extend to all parts of the body.

What are the 3 functions of the central nervous system?

The CNS is comprised of the brain, cerebellum and spinal cord. Remaining neurons, and associated cells, distributed throughout the body form the PNS. The nervous system has three broad functions: sensory input, information processing, and motor output.

What is the most important function of the nerves?

Important Nerves in the Human Body and What They Do All these nerves are part of what’s known as your body’s nervous system. You can think of nerves as your body’s electrical wiring — they transmit signals between your brain, spinal cord, and the rest of your body.

What is the largest of the cranial nerves and the most important sensory nerve of the face?

The trigeminal nerve is the largest of your cranial nerves and has both sensory and motor functions. The trigeminal nerve has three divisions, which are: Ophthalmic. The ophthalmic division sends sensory information from the upper part of your face, including your forehead, scalp, and upper eyelids.

What is the smallest cranial nerve?

The trochlear nerve is the fourth cranial nerve (CN IV) and one of the ocular motor nerves that controls eye movement. The trochlear nerve, while the smallest of the cranial nerves, has the longest intracranial course as it is the only nerve to have a dorsal exit from the brainstem.

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What is the largest of the cranial nerves?

The trigeminal nerve is the largest and most complex of the 12 cranial nerves (CNs). It supplies sensations to the face, mucous membranes, and other structures of the head. It is the motor nerve for the muscles of mastication and contains proprioceptive fibers.

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