BIO230H1 Lecture Notes - Lecture 18: Stem Cell, Basal Lamina, Basilar Membrane
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BIO230H1 Full Course Notes
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Lecture 18: stem cells: some tissues contain the same cells for the life of the organism, but the molecular components of these cells turn over. E. g. , the specialized architecture of auditory hair cells in the organ of corti. In the ear, the eardrum hits the membrane, vibrates the liquid, which moves basilar membrane; outer hair cells transmit signal to nerves and brain: converts sound waves into nerve impulses allows humans to hear. Sound waves cause stereocilia atop hair cells to tilt. Incident light enters the eye, sent to the back where cone (colour) photoreceptors and rod (low light) photoreceptors perceive it, and then light is sent back to the front, where axons projects messages to the brain. Cells exposed to radiolabeled leucine for a short time. Cells take up labeled amino acid and incorporate it into newly synthesized proteins for a short time. The detection for labeled leucine is gradually lost.
