Lab 6 Flashcards
(67 cards)
Where are astrocytes and oligodendrocytes located
CNS
What do astrocytes do
Maintain blood-brain barrier, repair damaged neuron development
What do oligodendrocytes do
Myelinate CNS axons, provide structural support
What type of glial cells are in PNS
Schwann cells, satellite cells
Where are Schwann cells located
surrounding all axis in PNS
What do Schwann cells do
myelinated the peripheral axons
Where are satellite cells located
surround neuron cell bodies in the ganglia
What do satellite cells do
Regulate exchange of nutrients and waste products b/w neural cell body and extracellular fluid
3 types of neurons
Sensory, motor, interneurons
4 structural types of neurons
Anaxonic, bipolar, unipolar, multipolar
3 types of sensory receptors
Interoceptors, Exteroceptors, Proprioceptors
What are interoceptors
Sensory receptor that receive stimuli from inside the body (gut, internal organs) *homeostasis, blood pressure
What are exteroceptors
Sensory receptor that receives external stimuli (touch, temp, pressure)
What are proprioceptors
Sensory receptor that receives stimuli from inside the body (position and movement)
What do muscle spindles do
monitor length of skeletal muscles
What do Golgi tendon organs do
monitor the tension in tendons during muscle contraction
What are Nociceptors
Free nerve ending for pain, interceptor or exteroceptor
Where are nociceptors located (free nerve ending for pain)
Skin, joint capsules, periosteum
What are Thermoreceptors
Free nerve endings for temperature (interoceptors and exteroceptors)
Where are thermoceptors located
Skeletal muscle, liver, skin
What are Chemoreceptors
Free nerve endings for chemical composition (interoceptors and exteroceptors)
Where are chemoreceptors located
Brain, skin
What are mechanoreceptors
Detect touch, pressure, movement on skin. Also muscle length and tension
What do Unencapsulated receptors detect (root hair plexus)
Fine touch. Exteroceptors, located epidermis, hair follicles
