21 AT 5 - nervous system Flashcards
What is the function of the nucleus of a neuron?
To provide DNA of cell
What part of the neuron provides the DNA for the cell?
Nucleus
What part of a neuron RECEIVES information FROM other neurons and carry information TOWARDS the cell body
Dendrite
What is the function of a dendrite?
To RECEIVE information FROM other neurons and carry information TOWARDS the cell body
What part of a neuron carries information FROM the cell body TO the axon terminal?
Axon
What is the function of the axon?
To carry information FROM the cell body TO the axon terminal
What is the function of an axon terminal?
To stores and secretes neurotransmitters which carry chemical messages to other neurons/cells
What part of a neuron stores and secretes neurotransmitters which carry chemical messages to other neurons/cells
Axon terminal
What is the function of the myelin sheath?
To insulate axon which increases the rate at which nerve impulses are conducted along the axon
What part of a neuron insulates the axon which increases the rate at which nerve impulses are conducted along the axon
Myelin sheath
What is the function of the nodes of ranvier?
Gaps in the myelin sheath that allow for depolarization of nerve impulse
What part of the neuron are the gaps in the myelin sheath that allow for depolarization of nerve impulse
Nodes of Ranvier
What is A?
Dendrite
What is B?
Axon Terminal
This is the gap between myelin sheath
What is C?
Node of Ranvier
What is D?
Myelin sheath
What is E?
Axon
What is F?
Nucleus
Cerebell
Cerebellum
Cerebr
Cerebrum
Medull
Medulla oblongata
Myel
Spinal cord
Neur
Nerve
baroreceptors
Bp, HR and Q
osmoreceptors
fluid levels. kidneys (renin), adrenal gland (aldosterone), pituitary gland (ADH), brain (thirst sensation)
chemoreceptors
RR and Ph, lungs (respiration rate for pH regulation)
Thermoreceptors
temperature, hair, skin, sweat glands, skeletal muscle, blood vessels
CNS
Central nervous system (brain and spinal cord)
PNS
peripheral nervous system
afferent
to brain (sensory)
efferent
from brain to body
What does the root term aesth refer to?
sensation
What does the root term phas refer to?
to speak
Axon
The long fiber that carries the nerve impulses.
Nerve
A bundle of axons.
synapse
The connection between adjacent neurons.
neurotransmitter
The chemical secreted into the gap between neurons at a synapse.
Reflex
A rapid automatic response to a stimulus.
Myelin sheath
The covering of fatty material that speeds up the passage of nerve impulses.
Axon terminal
The structure at the end of an axon that produces neurotransmitters to transmit the nerve impulse across the synapse.
Nerve impulse
The high speed signals that pass along the axons of nerve cells.
Dendrite
The branching filaments that conduct nerve impulses towards the cell.
Sense receptor
The sense organ or cells that receive stimuli from within and outside the body.
response
The reaction to a stimulus by a muscle or gland.
cell body
The part of the nerve cell containing the nucleus.
mening
meninges
CSF
Cerebrospinal fluid
TBI
traumatic brain injury
Autonomic nervous system
involuntary responses
somatic nervous system
voluntary responses
motor
movement
sympathetic nervous system
fight or flight
parasympathetic nervous system
rest and digest/ calm after stress
What is G?
Cell Body
enteric nervous system
Determines activity of GI tract/ direct link between gut and CNS
