BIOL 223 Chapter 15-1
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BIOL 223 Chapter 15-1
anatomy physiology somatic system
Study Cards for Chapter 15 BIOL 223 CSN
What is the difference between sensation and perception?
Sensation - receptor activated by sensory input
Perception - conscious awareness of the sensation
Tactile information that we are consciously aware of are known as:
Information that we are unaware of, such as blood pressure and heart rate are known as _______ senses.
Sight, taste, smell, and hearing are considered to be the:
List the four steps that occur when processing sensation.
sensory receptor is stimulated
receptor potential - local potential occurs within the receptor
generator potential - action potential sends information up to the brain
transduction - sensory information is sent to the appropriate sensory cortex
What is a receptor potential?
The local potential that occurs within the receptor.
What will occur during a generator potential?
If threshold is reached, an action potential sends information up to the brain
What happens if transduction does not occur?
It is as if the sensation wasn't there.
True or False: Humans cannot perform transduction on certain types of information such as high sonic frequencies or UV light.
True or False: Sensory receptors have specificity, meaning that pain receptors cannot detect temperature.
The connection between the receptor and the sensory cortex is known as the:
Receptors have areas they can monitor known as:
Small receptor fields correspond to _______ receptors which can localize stimuli precisely.
Less sensitive receptors correspond to _______ receptor fields.
Define adaptation in relation to sensory perception.
A decrease in sensitivity to a long lasting stimulus
Where does peripheral adaptation occur?
at the level of the receptor
List the two types of adapting receptors.
fast adapting receptors
slow adapting receptors
When a receptor is still active but the sensory cortex no longer responds, it is known as what type of adaptation?
Which type of tactile receptor has a small receptive field and is very sensitive.
fine touch and pressure receptors
A crude touch receptor will have a _______ receptor field and be _______ sensitive.
Which type of tactile receptor responds to itch and tickle sensations and is comprised of branching dendrites.
free nerve endings
Which type of tactile receptor responds to light touch and superficial pressure?
Which tactile receptor distinguishes low frequency vibration and two point discrimination?
Distortion, or movement of the hair, is perceived by the:
root hair plexus
This tactile receptor perceives deep pressure.
This tactile receptor perceives continuous pressure.