Nervous System
Terms
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- Dendrites
- short branched extensions carry impulses from the enviroment to cell body
- autonomic nervous system
- sympathetic or parasympathetic
- Synaptic terminals
- relay signals to other cells by releasing chemical messengers called neurotransmitters.
- Synapse
- site of contact between a synaptic terminal and a target cell.
- Axon
- carries impulses away from the cell body
- Interneurons
- make synaptic connections only with other neurons.
- Peripheral Nervous System
- divides in sensory division and motor division
- Neuron
- functional unit of the nervous system and is specialized for transmitting signals from one location in the body to anothe
- Sensory neurons
- communicate information about the external and internal environments from sensory receptors to the central nervous system.
- Cerebellum
- develops from part of the metencephalon. Its primary function is coordination of movement. It receives sensory information about the position of the joints and the length of the muscles, as well as information from the auditory and visual systems.
- Motor Division
- Somatic Nervous System or autonomic nervous system
- Central nervous system
- the brain and spinal cord.
- Functions of Nervous system
- Controls and coordinates all functions of the body
- Hypothalamus
- one of the most important brain regions for the homeostatic regulation. It is the source of two sets of hormones, posterior pituitary hormones and releasing hormones that act on the anterior pituitary.
- Medulla oblongata
- contains centers that control several visceral functions, including breathing, heart and blood vessel activity, swallowing, vomiting, and digestion.
- Cell body
- contains the nucleus and a variety of other cellular organelles.
- Motor neurons
- convey impulses from the CNS to effector cells.
- Thalamus
- is also the main input center for sensory information going to the cerebrum and the main output center for motor information leaving the cerebrum.
- Cell Body
- Largest Part contains nucleus
- Epithalamus
- includes a projection, the pineal gland, and a choroid plexus, one of several clusters of capillaries that produce cerebrospinal fluid.
- Nerve Impulses
- Are electrical self-propagatory