BackA&P 2 exam review 1
Terms in this set (15)
Which special sense receptors are dendrites and which are specialized receptor cells?
Dendrites: Olfactory (smell)
Specialized: Vision, hearing, equilibrium, taste.
How do dendrites and specialized cells signal differently?
Dendrites: The sensory neuron itself detects the stimulus and fires the signal
Specialized: The receptor cells detect the stimulus and relay the signal to the neurons.
What are the 3 semicircular ducts each ear has?
And what do they do?
Anterior, posterior, lateral
Semicircular ducts detect angular (rotational) head movements.
What do receptors in vestibule respond to?
Contains the maculae with hair cells.
Respond to: Linear acceleration and head position relative to gravity. (moving up/down, forward/backward, tilting your head).
What do receptors in the semicircular ducts respond to?
Contain the cristae ampullae's in the ampullae. Respond to: Rotational (angular) movements of the head (e.g., shaking your head “no,” spinning, turning).
What do receptors in the cochlear duct respond to?
Contains the organ of Corti with hair cells. Respond to: Sound vibrations (hearing).
What is the visible part of the electromagnetic spectrum?
380nm to 700nm
Describe the gustatory pathway from the receptors to the primary sensory cortex.
Taste receptor cells → Cranial nerves (VII, IX, X) → Medulla (solitary nucleus) → Thalamus → Primary gustatory cortex
What is the pathway of auditory signals from the ear to the brain?
Sound waves → Outer ear → Middle ear bones → Cochlea (hair cells) → Auditory nerve → Brainstem → Thalamus → Primary auditory cortex
What are the functions of the cornea and lens?
Focus light
What does the iris do?
Regulates light entry
What does the retina do?
coverts light into nerve signals.
What are the fluids that maintain shape and nourish tissues?
the aqueous and vitreous humor
What does the sclera do?
protects and supports
What nerve transmits visual info to the brain?
The Optic nerve