HEENT Structure and Functional Organization Flashcards
(89 cards)
What is a conscious or subconscious awareness of changes in the external or internal environment?
Sensation
What are the special senses?
- Smell
- Taste
- Vision
- Hearing
- Equilibrium
What conditions must be satisfied for a sensation to occur?
- A stimulus
- A sensory receptor converting the stimulus to an electrical signal.
- A nerve pathway conducts the information to the brain.
- A region of the brain translates/integrates the nerve impulse into a sensation.
What is the conscious awareness and interpretation of sensations?
Perception
What senses include tactile, thermal, pain, and proprioceptive sensations?
Somatic
What senses provide sensations from internal organs?
Visceral
Perceptions are a function of what?
Cerebral Cortex
What is the decrease in the strength of a sensation during prolonged exposure to a stimulus?
Adaptation
What type of receptors detect mechanical deformation of adjacent cells?
Mechanoreceptors
What type of receptors detect changes in temperature?
Thermoreceptors
What type of receptors detect pain?
Nociceptors
Are nociceptors adaptable?
No
What receptors are virtually located in all tissues of the body except for the brain?
Nociceptors
What type of pain is known as acute, sharp, or pricking?
Fast pain
What type of pain is precisely located?
Fast pain
What type of pain tends to be chronic, aching, burning, or throbbing?
Slow pain
What type of pain is more diffuse?
Slow pain
Thermal receptors are located in the epidermis and dermis. Which is cold and which is hot?
Epidermis - Cold
Dermis - Warm
Thermal receptors for cold are located in what?
Epidermis
Thermal receptors for warm are located where?
Dermis
What type of receptors are deep dermal and located everywhere?
Mechanoreceptors
Which receptor for somatic senses include touch, pressure, vibration, itch, and tickle?
Tactile
Between what temperatures activates cold receptors located in the epidermis?
10-40 C (50-105 F)
Between what temperatures activates warm receptors located in the dermis?
32-48 C (90-118 F)