Explain the role of the endolymph of the semicircular canals in activating the receptors during angular motion
What will be an ideal response
The crista ampullaris responds to changes in the velocity of head movement (angular acceleration). The crista consists of a tuft of hair cells whose microvilli are embedded in the gelatinous cupula. Rotational movement causes the endolymph to flow in the opposite direction, thus bending the cupula and exciting the hair cells.
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A) pharynx B) laryngopharynx C) trachea D) epiglottis E) oropharynx
Which of the following statements correctly describes the relationship between DNA, RNA, and transcription factors?
A) There is only one transcription factor for each region of DNA encoding RNA. B) Transcription factors must always bind close to the transcription start site. C) Phosphorylation is one way of regulating interactions between proteins required for transcription of DNA. D) Transcription factors carry out the process of transcription themselves.
Which of the following structures is not associated with the right atrium?
A) crista terminalis B) pectinate muscles C) oval fossa (fossa ovalis) D) opening of coronary sinus E) tendinous chords (chordae tendinea)
Which tissue is found lining the lumen of the esophagus and adult vagina?
A. Stratified squamous epithelium B. Simple squamous epithelium C. Urothelium D. Stratified columnar epithelium E. Pseudostratified columnar epithelium