Extra Nervous Sys. Q's Flashcards
(18 cards)
List the glial cells in CNS
Astrocytes
Oligodendrocytes
Microglia
Ependymal cells
Function of astrocytes?
possess receptors for neurotransmitters
Physically support neurons
induce formation of blood-brain barrier
Function of oligodendrocytes?
form myelin sheath in CNS
Function of microglia?
role in defence of brain (phagocytosis)
Function of ependymal cells?
Line cavities of brain & spinal cord
contribute to formation of CSF
Stem cells
Label on brain diagram the
frontal lobe occipital lobe temporal lobe parietal lobe cerebellum cerebrum brain stem
Label on split brain diagram the
amygdala hypothalamus pons medulla oblongata pineal gland pituitary gland optic chiasm thalamus
Study the diagram of brain ventricles
DO IT
Study/relabel sheep brain diagram pg 239 prac book 3
DO IT
Label diagram of neuron
DO IT
What is the function of the dendrites?
conduct electrical impulses TOWARD cell body
What is the function of axons?
Conduct electrical impulses AWAY from cell body
What is the function of axon hillocks?
interpret messages, start of AP
Main brain regions involved in receiving info on somatic sensation?
Thalamus, parietal lobe (somatosensory cortex)
Main brain regions involved in memory formation & storage and emotion?
prefrontal cortex, hypothalamus, amygdala
Describe the general components of a reflex arc
- stimulus
- receptor
- sensory (afferent) pathway
- Interneuron (integration)
- Motor (efferent) pathway
- Effector organ-action response
How do the two divisions of the ANS differ in their general function?
SNS is for ‘fight or flight’ activities e.g. dilate airways, blood vessels, increase HR, inhibit digestion
PsNS is for ‘rest & digest’ activities e.g. constrict airways, blood vessels, decrease HR, activate digestion
Read over diagram of spinal cord
DO IT
