Stereocilia Samenvattingen, Notities en Examens

Define adaptation - Answer Reduction of sensory responsiveness when stimulation is unchanging. It prevents us from having to respond continuously to unimportant information Explain the adaptation process for the visual pathway - Answer Low levels of Ca++ activate recoverin which activates rhodopsin kinase, phosphorylates rhodopsin, arrestin binds and shuts off pathway Explain the adaptation process for the auditory pathway - Answer (prolonged stimulus) Stereocilia are bent, tip links...

Transduction Ans: The change in sound energy from one form to another Impedance mismatch in the ear Ans: 30 dB SPL loss at the oval window Function of the middle ear Ans: Equalizes pressure Resting potential of the scala media Ans: +80 mv Transduction stages (earliest-latest) Ans: 1. Condensation/rarefaction of air molecules 2. In and out movement of the oval and round windows 3. Back and forth movements of stereocilia 4. Depolarization and hyperpolarization of hair cells 5. Phas...

What are the main functions of the vestibular system? -:- - provide us with our sense of balance and head position What are the peripheral vestibular organs? -:- - semicircular canals - otolith organs What is the function of the semicircular canals? -:- - respond to head movement (turning) by detecting angular acceleration Describe the structure of the semicircular ducts. -:- - each has swelling on end (ampulla) - inside ampulla is a gelatinous mass (cupula) - cupula sits on top o...

what are the two main functions of the outer ear (pinna)? Ans: sound localization and middle ear protection Where is the endolymph found and what charge does it have? Ans: in the scala media; positive charge Where is the scala vestibuli located? Ans: in the upper portion where does a low frequency sound start on the basilar membrane? Ans: low frequency sounds start at the apex where does a high frequency sound start on the basilar membrane? Ans: high frequency sounds start at the base ...

endolymph Ans: cochlear fluid w high K, low Na tectorial membrane Ans: the stereocilia are attached to this Heschl's gyrus Ans: primary auditory cortex reticular lamina Ans: upper surface of the organ of Corti, which is composed of a tight mosaic of the tops of all the cells stria vascularis Ans: highly vascularized system of cells that maintains the ionic charge of the endolymph internal auditory canal Ans: opening in the petrous portion of the temporal bone where both the 8th and...

Volledige samenvatting van lessenreeks over evenwicht gedoceerd door Prof. Desloovere. Hoort bij het onderdeel ziekteleer.

What are the two sections of the vestibule? - Ans Utricle and saccule Which section of the vestibule is stimulated when nodding your head? - Ans The saccule, it stimulates the hair cells The more the hair cells bend... - Ans the higher the frequency How does the brain perceive the intensity of sound? - Ans Through the stereocilia. The greater bending, the more intense the sound In the inner ear, the vestibular system is ____ from the cochlea - Ans separate

What part of the cell contains the centrioles and the centrosomes? permuclear cytoplasm What is the function of the endocytic vesicle? moves large particles, fluid, or molecules What structure synthesizes protein for use inside cell? free ribosome The nuclear envelope has a phospholipid bilayer. True What structure regulates the passage of material between the cytoplasm and nucleus? nuclear pore What is the function of the nucleolus? ribosomal RNA synthes...

Define adaptation - Answer Reduction of sensory responsiveness when stimulation is unchanging. It prevents us from having to respond continuously to unimportant information Explain the adaptation process for the visual pathway - Answer Low levels of Ca++ activate recoverin which activates rhodopsin kinase, phosphorylates rhodopsin, arrestin binds and shuts off pathway Explain the adaptation process for the auditory pathway - Answer (prolonged stimulus) Stereocilia are bent, tip links...

Vestibular Disorders O'Sullivan Review questions with correct answers 2024 Within the Semicircular Canals, they are filled with endolymph. This fluid responds to what type of movement of the head? - answer-angular rotation Describe how excitation of the SCCs would occur: - answer-stereocilia would deflect towards the kinocilia within the ampulla List the otolith organs: - answer-utricle, saccule Describe how/when excitation of the otolith organs occur: - answer-saccule: vertical linear ...