0
How do movements stimulate the hair cells in the vestibular system?
Mbclimber
The hair cells have a special type of ion channel that is gated by mechanical deformation. Depending on which way the hair cell bends, the neuron will either become hyperpolarised or depolarised. Deformation of the hair cells is caused by two separate mechanisms depending on which part of the vestibular system is in question. For the semicircular canals (SCCs) - these are filled with a fluid, such that when the head moves, the fluid momentarily lags behind exerting pressure on a membrane called a cupula. At its base are hair cells that project up into the cupula. When the cupula is deflected, so are the hair cells. The second component is the otolithic organs. These consist of a flat, top heavy bed of tissue with hair cells at their base. When the head moves up/down or side-to-side, the tissue (otolithic membrane) momentarily lags behind and the hair cells are deformed. In both cases the transduction is mechanical -> electrical; but whereas the SCCs rely on fluid movement for the mechanical force, the otoliths don't.
Wiki User
∙ 15y ago
Add your answer:
Earn +20 pts
What causes vestibular neuritis?
The researchers are investigating the possibility that a viral disease or disorder of the immune system is responsible for the demyelination of the vestibular nerve cells.
What part of the ear picks up the messages and transmit to the brain?
The 8th cranial nerve sends messages to the brain from the ear. There are several parts involved: In the inner ear are receptor cells that receive vibrations of sound and noise from the outside, which then stimulate the cochlear nerve to send these sounds to the brain for interpretation.Head movements also affect the fluid inside the ear and stimulate the vestibular nerve to send information to the brain regarding the body's sense of balance or position.
What is the produced by glands to stimulate cells or tissues into action?
Hormones are produced by glands to stimulate cells or tissues into action
What cells stimulate both atria to contract?
Nodal or pacemaker cells.
What is vestibular schwannoma?
A vestibular schwannoma is a type of benign (non-cancerous) tumor that affects the eighth cranial nerve.
What causes vestibular neuritis?
The researchers are investigating the possibility that a viral disease or disorder of the immune system is responsible for the demyelination of the vestibular nerve cells.
What is the pathway through which vibrations and fluid currents are transmitted to finally stimulate the hair cells?
Eardrum - Malleus - Incus - Stapes - Oval Window - Perilymph (in scala vestibuli) - Vestibular membrane - Endolymph (cochlear duct) - Hair cells (Organ of corti)
What part of the ear picks up the messages and transmit to the brain?
The 8th cranial nerve sends messages to the brain from the ear. There are several parts involved: In the inner ear are receptor cells that receive vibrations of sound and noise from the outside, which then stimulate the cochlear nerve to send these sounds to the brain for interpretation.Head movements also affect the fluid inside the ear and stimulate the vestibular nerve to send information to the brain regarding the body's sense of balance or position.
What is importance of the mantle?
The mantle is where convection cells are formed. Convection currents help stimulate the tectonic plate movements thus recycling sediments and soil.
What is the mantle important?
The mantle is where convection cells are formed. Convection currents help stimulate the tectonic plate movements thus recycling sediments and soil.
What is the produced by glands to stimulate cells or tissues into action?
Hormones are produced by glands to stimulate cells or tissues into action
Receptor cells for the vestibular sense send messages to the?
frontal lobes
Which part of the ear is responsible for equilibrium?
The hair cells within the vestibule and semicircular canals of the cochlea are responsible for both aspects of equilibrium (dynamic and static).Vestibular system
What cells stimulate both atria to contract?
Nodal or pacemaker cells.
How do circulating hormones differ from paracrines and autocrines with reference to their target cells?
Paracrines are a group of local hormones that work on nearby cells. Autocrines stimulate the same cell and circulating hormones can travel long distances to stimulate cells. Hormones only stimulate cells that have their specific receptor.
What is vestibular schwannoma?
A vestibular schwannoma is a type of benign (non-cancerous) tumor that affects the eighth cranial nerve.
What are the chemicals that stimulate immune cells called?
crancious
