BIOL 2112 Chapter Notes - Chapter 29: Rhodopsin, Vitreous Body, Color Vision
4 Jun 2018
School
Department
Course
Professor
1.Describe the essential roles of sensory receptors.
Sensory receptors are specialized neurons or other cells that are tuned to the conditions of the external
world or internal organs.
All receptors trigger an action potential and sends information to CNS
2.Explain how electromagnetic receptors help turtles and fish navigate.
These animals have magnetoreception (from the mineral magnetite) to determine which way is north &
to sense differences in the magnetic field geographically
3.Define sensory transduction, receptor potential, and sensory adaptation and provide examples of each.
Sensory transduction- receptor cell converts one type of signal to another type of signal (produces a
change in the cell’s membrane potential)
Receptor potential- Changes in the flow of ions create a graded change in membrane potential in
sensory receptor cells
Sensory adaptation- the tendency of some sensory receptors to become less sensitive when they are
stimulated repeatedly
4.Describe the five general categories of sensory receptors found in animals and provide examples of each.
1. Pain receptors- detect dangerous stimuli including high heat and pressure
2. Thermoreceptors detect heat or cold
3. Mechanoreceptors respond to mechanical energy
a. touch and pressure
b. stretching
c. motion
d. sound
4. Chemoreceptors- include sensory receptors in our nose and taste buds
5. Electromagnetic receptors
a. electricity
b. magnetism
c. various wavelengths of light
5.List the structures of the ear in the sequence in which they participate in hearing.
Outer ear (pinna), auditory canal, eardrum, middle ear (malleus, incus, stapes), Cochlea
6.Explain how body position and movement are sensed in the inner ear.
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
Sensory receptors are specialized neurons or other cells that are tuned to the conditions of the external world or internal organs. All receptors trigger an action potential and sends information to cns. 2. explain how electromagnetic receptors help turtles and fish navigate. These animals have magnetoreception (from the mineral magnetite) to determine which way is north & to sense differences in the magnetic field geographically. 3. define sensory transduction, receptor potential, and sensory adaptation and provide examples of each. Sensory transduction- receptor cell converts one type of signal to another type of signal (produces a change in the cell"s membrane potential) Receptor potential- changes in the flow of ions create a graded change in membrane potential in sensory receptor cells. Sensory adaptation- the tendency of some sensory receptors to become less sensitive when they are stimulated repeatedly. Chemoreceptors- include sensory receptors in our nose and taste buds. Electromagnetic receptors: electricity, magnetism, various wavelengths of light.
