Nervous System Flashcards
what are the functions of the nervous system
communication, regulating internal events, organising behaviour (externally), information storage, sensations, perceptions and emotions.
what are the two types of cell found in the nervous system
neurons and glial cells
give a summary on glial cells
they are more numerous than neurons, and have a supportive/nutritive role, such as myelin formation.
which glial cells are responsible for myelin formation
schwann cells in the peripheral nervous system and oligodendrocytes in the central nervous system
what are the types of glial cells
astrocytes
microglia
ependymal cells
oligodendrocytes
schwann cells
what are astrocytes involved in
nutrient supply to neurons in central nervous system. they have a supportive structure involved in their distribution of this food
what are microglia involved in
they have a defence role - they are phagocytic
what are ependymal cells involved in
production of cerebrospinal fluid. they have cilia because they work with fluids.
what are cilia associated with
fluids and movement of fluids
what are oligodendrocytes involved in
neuronal support and myelin formation. they can wrap around more than one neuron. this allows them to have a supporting function.
what are schwann cells involved in
neuronal support and myeling formation in the peripheral nervous system
give a summary on neurons
they are excitable cells involved in the generation and transmission of signals. they are also involved in synaptic processing like memory, and have various types like their structure being related to function
what are included in the peripheral nervous system
spinal and cranial nerves
what are included in the central nervous system
spinal cord and the brain
what arises from the central nervous system
the peripheral nervous system
what does afferent mean
this is when something is going onto the central nervous system
what does efferent mean
this is something leaving the central nervous system
what are the different forms of affarent and efferents
somatic and visceral
what is visceral
information from internal organs and blood vessels
what is somatic
this is information from muscles, bone and soft tissue
what are examples of motor responses to somatic efferents
exocrine gland secretion