The Nervious System Flashcards
What is the central nervous system made of
Brain, spinal cord
What is the peripheral system made of
Spinal nerves, cranial nerves and there roots and branches.
What does the system do
Responds to internal and external environments
what is a stimulus
a change
what does the nervous system do
-stimulus causes change
-Receptors detect changes
-nervous system transmits impulses to an effector
-Effectors cause the response.
what is an effector
effector is a muscle or a gland, such as an endocrine gland.
how are Endocrine responses different
Endocrine responses are slower but longer lived than nervous responses
where is the spinal cord
in the middle of the vertebrae
what is the spinal cord surrounded by
three membranes collectively called the meninges.
what is the outsized elf the spinal cord called
white matter
what is the inner potion of the spinal cord made of
grey matter
what is white matter made of
myelinated neurons
what is grey matter made of
contains many nuclei, cell bodies and non-myelinated neurons.
what is is in the middle of the spinal cord
central canal
what is the central canal made of
cerebro-spinal fluid
