Week 20 Flashcards
(28 cards)
What are the five types of tactile sensations?
- Touch
- Pressure
- Vibration
- Itch
- Tickle
What is discriminative touch?
Ability to provide location and texture of the source of touch.
What do cold receptors respond to?
Temperatures between 10-40 °C.
Where are warm receptors located?
In the dermis.
What is referred pain?
Visceral pain felt as if it is coming from a different part of the body.
What spinal cord segments are involved in referred pain from a heart attack?
T1-T5.
What are the two classes of sensory modalities?
- General Senses
- Special Senses
What are examples of cutaneous sensations?
- Tactile
- Thermal
- Pain
- Proprioceptive
What is the definition of sensation?
Occurs when sensory receptors are stimulated and send information to the brain.
What is the definition of perception?
Conscious awareness & interpretation of stimuli.
Fill in the blank: The sensation of pain is produced below ______ °C and over ______ °C.
10, 48
What are chemoreceptors responsible for detecting?
Changes in chemical concentration.
What type of receptors are responsible for detecting changes in temperature?
Thermoreceptors.
What are proprioceptors?
Receptors that provide awareness of body position and movement.
What is the primary gustatory area responsible for?
Perception of taste.
How many taste buds are found on the tongue?
About 10,000.
What are the four primary taste sensations?
- Sour
- Bitter
- Sweet
- Salty
What cranial nerves innervate taste buds?
- VII
- IX
- X
What is the role of the olfactory tract?
Transmits impulses to the limbic system and olfactory cortex for interpretation.
What occurs during olfactory stimulation?
Odorants bind to receptors, Na+ channels open, depolarisation occurs.
What type of cells are olfactory receptors?
Bipolar neurons with cilia or olfactory hairs.
What do nociceptors respond to?
Tissue damage and excess exposure to various stimuli.
True or False: Pain receptors adapt significantly to stimuli.
False
What is the function of gustatory hairs?
Develop receptor potentials that cause the release of neurotransmitters.
