Nervous Tissue Flashcards
Central nervous system
spinal cord, brain
Peripheral Nervous system
cranial, spinal and peripheral nerves conducting impulses
Ganglia
Sensory somatic
sensory input received consciously (eyes, ears, skin, musculoskeletal structures)
Sensory visceral
sensory input not received consciously (internal organs and cardiovascular structures)
Motor somatic
motor output controlled consciously (skeletal muscles)
Motor autonomic
motor output not controlled consciously (heart or gland effectors)
Neuron cells
functional units of PNS and CNS. Process information and generate response to stimuli
Glial cells
support and protect neurons, participate in neural activities, neural activities, and defense of cells in CNS
Three parts of the neuron
Cell body
Dendrites
Axon
Cell body
Large with a large nucleus and well-developed nucleolus
what are nissl substances/ bodies?
large masses of free polyribosomes and RER, indicating a high rate of protein synthesis
dendrites
receive input from other neurons
Axon
carries impulses from cell body and is covered by a myelin sheat
The space between the end of the axon and the cell membrane is the
synaptic cleft
what enables the continuity of of the nerve impulse?
Neurotransmitters