Specialized Tissue, Stem Cells and Tissue Renewal-2 Flashcards
What is sensory epithelia?
specialized epithelium that covers certain parts of the body (sensory tissue of the nose, ears, and eyes)
Where is the sensory epithelia derived from?
ectoderm
Eyes have _____
photoreceptors
Ears have _____
auditory hair cells
Nose has _____
olfactory sensory neurons
Describe the structure at the apical end of sensory cells?
detects the external stimulus and converts it into a change in membrane potential
Describe what the basal end of the sensory cells does?
makes a synapse with neurons that relay sensory information to specific sites in the brain
Where does the dendrite of the bipolar neurons face?
facing the extracellular environment
What do the supporting cells of the olfactory neurons do?
hold neurons in place and separate them from one another
Basal cells in the epithelium are cells in contact with the ____
basal lamina
Cilia have _____ proteins what are a type of _____ coupled receptors
oderant receptor; G protein
activated olfactory receptor activate _____
intracellular G protein (Golf)
What do oderant receptors help in?
axonal guidance and all growth cone to migrate to and establish connection with correct glomerulus in olfactory bulb
Reduced olfaction has observed in ____ individuals and in people with age dependent ______ disorders
aged; neurogenerative
What happens in idiopathic Parkinson’s disease?
reduced sense of smell precedes clinical symptoms of the disease by almost ten years
