What determines how a sensation is experienced.
It depends on which part of the brain receives the impulses
________ is awareness of a stimulus.
Sensation
The conscious awareness of sensations is ________.
Perception
What part of the brain "understands" a stimulus?
Cerebral Cortex
T / F Pressure and touch receptors adapt quickly.
True
T / F It takes some time for receptors in muscles and joints that report on body position to eventually adapt.
False - They never adapt
T / F Most sensory receptors stop responding when continuously stimulated, leading to a decrease in the awareness of the stimulus
True - Most do, but there are a few exceptions.
Mechanoreceptors that detect touch include:
1. Merkel disks
2. Meissner's corpuscles
3. Pacinian corpuscles
4. Ruffini corpuscles
Select all that apply
1. Merkel disks
2. Meissner's corpuscles
Mechanoreceptors that detect LIGHT touch include:
1. Merkel disks
2. Meissner's corpuscles
3. Pacinian corpuscles
4. Ruffini corpuscles
Select all that apply
1. Merkel disks
Which Mechanoreceptors are encapsulated nerve endings that tell us where we have been touched
1. Merkel disks
2. Meissner's corpuscles
3. Pacinian corpuscles
4. Ruffini corpuscles
Select all that apply
2. Meissner’s corpuscles
Which Mechanoreceptors detect the first pressure or vibration
1. Merkel disks
2. Meissner's corpuscles
3. Pacinian corpuscles
4. Ruffini corpuscles
Select all that apply
3. Pacinian corpuscles
If a pressure stimulus continues to a given area it is detected by:
1. Merkel disks
2. Meissner's corpuscles
3. Pacinian corpuscles
4. Ruffini corpuscles
Select all that apply
4. Ruffini Corpuscles
T / F Free nerve endings are found in the superficial tissues of the body.
False - All tissues of the body
What triggers free nerve endings.
Damaged tissue releases chemicals that the free nerve endings respond to.
If you have a heart attack you will probably have pain in the chest and left arm. What is this pain referred to as?
Referred pain
A child has a fever, pain in the right lower abdomen and elevated white blood cell count. What is the likely diagnosis.
Appendicitis
T / F The sclera is the transparent area of the eye which allows light penetration
False - Sclera is the white of the eye. The cornea is transparent.
T / F The Iris regulates pupil size.
True
The nutrients supplied to the eye by blood vessels are delivered to a structure called the ______.
Chorid
T / F There are more cones in the eye than there are rods.
False - There are more rods.
In poor lighting, we depend more on rods than we do cones.
True There are many more rods and they provide greater resolution.
There are 3 type of cones in the eye. They detect which 3 colors.
Red, Green, and Blue (RGB)
Sound waves can be viewed on an oscilloscope. When the cycles are closer together the pitch will be
1. Higher Pitch
2. Lower Pitch
1. Higher Pitch - In music this would be the treble cleft. In singing it would be soprano.
Sound waves can be viewed on an oscilloscope. When the height of the cycles is shorter the amplitude will be
1. Less volume (quieter)
2. More volume (louder)
1. Less volume (quieter)
Name the 3 bones in the ear.(scientific names)
1. Malleus
2. Incus
3. Stapes
The smallest bone in the human body is the
Stapes
The bones in the ear have 3 common names that might make you think of a blacksmith. What are the 3 common names.
1. Hammer (Malleus)
2. Anvil (Incus)
3. Stirrup (Stapes)
List the sequence of events that make hearing possible in order of their occurrence..
1. Movement of the stapes
2. Movements of the fluid
3, Swinging presses projections on the hair cells
4. Bending of the hair cells alters the rate of nerve impulses
A child looses most of the hearing in one ear suddenly for no explained reason. There are not signs of infection or trauma. His mother takes him to the doctor who examines his ear. The doctor removes a bean from down deep in the ear canal with some tweezers. The boy's hearing is restored immediately. Which of the 2 types of hearing loss did he have?
Conductive - His ear canal was plugged up by the bean and did not allow sound to vibrate the ear drum.
John has always liked his music loud. By the time he is in his forties he is having a noticeable reduction in hearing. He sees an audiologist that explains he has a sensorineural hearing lost and he can only help him a limited amount. He has damage because it has affected 2 parts of the anatomy of the ear. Name them.
1. Hair cells
2. Nerve supply