Nerve impulse Flashcards
neurons communicate with each other through
dendrytes
resting potential is
-70mv
threshold is
-55mv
sensory neurons
neurons are attached t stimulus receptors and carry messages to the processing centers of the nervous system
inter neurons
these neurons make up the processing centers of the nervous system
motor neurons
these neurons carry a response message back to either a muscle or a gland/
peripheral nervous system
somatic and autonomic
somatic
sensory neurons
motor neurons
autonomic
1.) sympathetic system
2.) parasympathetic system
frontal lobe
controls movement of voluntary muscles which includes walking and speech. It is also linked to intellectual activities and learning.
temporal lobe
associated with hearing, although it also has links with vision, memory and sensory information interpretation.
the cerebellum is located
immediately below the cerebrum
the cerebellum controls
the subconscious skeletal muscle contractions required for movement balance posture and muscle contraction
thalamus
The thalamus is located below the cerebrum and is responsible for coordinating and interpreting sensory information associated with touch, pain, heat and cold.
hypothalamus
The hypothalamus is located below the thalamus and is associated with the control of hunger, body temperature, aggression and other aspects related to metabolism.
medulla oblangata
The medulla oblongata is located below the pons and above the spinal cord. It serves as a connection between the central and peripheral nervous systems. It is associated with the autonomic nervous system and as such controls many internal organ responses such as breathing rate, heart rate, peristalsis and glandular secretions.
means “bridge”. It is appropriately named as it serves as a relay station for information passing between the cerebrum, the cerebellum and the medulla.
pons
is a complex set of structures that lies on both sides and beneath the thalamus. This system includes the hypothalamus, hippocampus and the amyglada. This system is very much related to memory and your emotions.
limbic system
the amyglada
is located on the left side of the thalamus and controls emotions such as aggression, fear and jealousy.
hippocampus
is also located on the left side of the thalamus and is required for the formation of long term memories.
the eye Is composed of three separate laters
sclera
colorid
retina
choroid
middle layer of the tissue in the eye that contains blood vessels and dark pigments that absorb light to stop reflection
toward the front of the choroid layer is the iris
retina
innermost layer of tissue at the back of the eye containing photoreceptors
aqueous humor
watery liquid that protects the lens of the eye and supplies the cornea with nutrients
vitreous humour
maintains the shape of the eyeball and permits light transmission to the retina
fovea
area at centre of retina where cones are most dense and vision is sharpest; no rods present here
blind spot
where the optic nerve attaches to the retina
the reflex arc
an involuntary response to stimuli controlled by the somatic division of the nervous system
the simplest of neural responses that generally involves only 2 or 3 neurons
damage of the occipital lobe
causes identifying colours
a ventral tract brings
motor information
a dorsal nerve carries
sensory information
the cerebellum is also known as the forebrain
no
the cerebrum is part of the forebrain
yes
what does the medulla oblongata control
the heart rate, breathing and blood pressure
monsynaptic
refers to the presence of a sin gle synapse no interneuron is present
polysynaptic
multiple interneurons
inhibitory neurotransmitters
lowers resting potential
the part of the brain that allows ommunicatio between the two hemispheres is called
corpus callosum
the division of the nervous system which consists of nerves found lying outside of the CNS
peripheral
the section of the nervous system that allows you to control the movement of your arm or leg
somatic
in the axon of a motor fiber the impulse travels
towards the dendrytes
a sudden influx of sodium ions at the stimulated point of a neuron results in a phenonmenon known as
depolarization
which neurons are contained in the central nervous system
interneurons
the knee jerk relay pathway has a motor neuron connected directly to a sensory neurons this is an example of
monosynaptic pathway
denrites of a neuron may often
recieve impulses from other neurons
clinical depression has been linked to a lack of serotonin (a neurotransmitter) in the body. For a patient suffereing from depression, would you recommend a drug that interferes with the re-absorption of serotonin into cells, or a drug that blocks serotinin receptors?
Yes I would recommend this because a drug that interferes with the re absorption of serotonin into cells allows more seratonin into the synaptic cleft.
what is an example of a polysynaptic reflex
One example is the automatic withdrawal of the leg when the foot steps on a sharp object
These neurons make up the processing centers of the nervous system.
inter neurons
These neurons carry a response message back to either a muscle or a gland.
motor neurons
what is action potential
35mv
