nervous system Flashcards
(39 cards)
Function of
Nervous system
The function of the nervous system is to detect impulses from the senses; control center of the body
Major organs of
nervous system
Brain, Spinal cord,
senses, and
nerves
Difference
between neurons
and neuroglia
Neurons make up
10% while
neuroglia makes
up 90%
Dendrite
receive the nerve
impulses from the
senses or another
neuron
Soma
body of the
neuron that holds
the nucleus
Schwann cells
main glial cells of
the peripheral
nervous system
Node of ranvier
impulses jump from node to node, which increase speed of impulse
Myelin
insulates the axon.
Produced by the
Schwann cells
Axon
passageway for nerve impulses after cell body; end in axon terminal
CSF
Cerebrospinal
Fluid
Cerebrum
Largest part of
brain
Lobes of
cerebrum
Frontal lobe
Lobes of
cerebrum
Parietal lobe
Lobes of
cerebrum
Optical lobe
Lobes of
cerebrum
Temporal Lobe
Thalamus
Relays sensory impulses to the cerebral cortex for processing and sorting
Hypothalamus
Controls hormones released by pituitary gland (often called the "master endocrine gland")
Brainstem
Midbrain, pons,
medulla
oblongata
Regions of
Brainstem
Midbrain
Regions of
Brainstem
Pons
Regions of
Brainstem
Medulla
Oblongata
Cerebellum
Responsible for coordinating the movements directed by the cerebrum so that they are graceful and efficient
Spinal Cord
31 pairs of spinal nerves branch out from the spinal cord, connecting to all parts of the body
Different types of
sensory receptors
Merkel’s desk