Neuron quiz Flashcards
Autonomic and somatic nerves. Comprised of nerves that carry information between body and CNS
Peripheral nervous system
Involuntary, specialized sensory and motor nerves designed to control the internal and environment of the body. Controlled by hypothalamus and my medulla obbligato in brain
Automatic nerves
Voluntary, specialized sensory and motor nerves designed to deal with the external environment of the body, controlled by cerebellum and frontal lobe of cerebrum
Somatic nerves
receives information from receptors or other neurons
Dentrites
Release neurotransmitter into synpase
Axon terminal
Projects from cell body. Very thin, vary in length, carrie the impulse towards the other neurons or effectors
axon
Myelinated neurons have gaps where there is no myelin. Impulse jump from one node to another
Nodes de Ranvier
Delicate membrane formed by Schwann cells in PNS. Allows for repair
neurilemma
Type of neuroglial cell that line the axon and secrete myelin
Schwann cells
Soma. Contains nucleus and other cell parts. Carries out metabolic activities
Cell body
Myelinated nerve tissue, found in the deep layers of the brain and the outer portion of the spinal cord
White matter
Non-myelinated nerve tissue, found in the surface layers of the brain and the centre of the spinal cord
grey matter
Brain and spinal cord. acts as a coordinating centre or regulator for the body of incoming and outgoing information
Central nervous system
Nerves arise from ribs and small of the back [fight/flight/freeze]
Sympathetic
Nerves arise directly from brain or neck and tailbone sections of spinal cord [rest + digest]
parasympathetic
Non-conducting cells, nourish and support the nerve cells. 90% of cells in human CNS
glial cells
Functional units of the nerve the system, conduct impulses there are three
Neurons
Relay info about environment to the CNS for processing. Associated with the receptor cells in contact with environment(touch receptor in skin)
Sensory [afferent] neurons
Form links within body. Found within brain and spinal cord [CNS]. The integrate and interpret sensory info and connect it to the outgoing motor neurons(make decisions)
Interneurons ( associated neurons )
Relay info from the CNS to the effectors. Effectors could be muscles, glands or organs (get message to gland/muscle)
Motor(efferent) neurons
Covering of glial cells along axon(white matter neuron only)
Myelin sheath
parasympathetic neurotransmitter
Acetylcholine
Sympathetic neurotransmitter
norpinephrine