Alliyah Evangelista-
What is our nervous system composed of?
10 billion nerve cells and has external and internal receptors.
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What is the function of nerve cells (neurons)?
Carries electrical messages all over the body.
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What are the 2 divisions of our nervous system?
1. Central nervous system (CNS), 2. Peripheral nervous system (PNS)
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What is in the CNS?
Brain and spinal cord
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What is in the PNS?
Cranial, spinal nerves, plexuses and peripheral nerves
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What do cranial nerves do?
They carry impulses between the brain and the head and neck.
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What do the spinal nerves do?
They carry messages between the spinal cord and the chest, abdomen and extremities.
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Spinal and cranial nerves detect and respond to changes in the outside world. True or false.
True
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Where do sensory (afferent) nerves carry messages to?
Spinal cord and brain
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Where do motor (efferent) nerves travel to?
To the muscles of the body, giving them instruction.
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Where does autonomic nervous system carry impulses to?
CNS to organs
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What nerves stimulate our FIGHT OR FLIGHT/stress?
Sympathetic nerves
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Parasympathetic nerves balance ___.
sympathetic nerves
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How do the parasympathetic nerves balance the sympathetic nerves?
- Slowing heart rate
- Lowers blood pressure
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What are the divisions of the CNS and PNS?
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What are the parts of a neuron?
-dendrites
-cell body
-cell nucleus
-axon
-myelin sheath
-terminal end fibers
-synapse
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What are the cerebrum's surface nerve cells?
cerebral cortex
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What is the cerebrum responsible for?
speech, vision, speech, smell, movement, hearing and thought
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What is the cerebellum responsible for?
coordinates voluntary movements and maintains balance
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What does the hypothalamus do?
- It controls temp., sleep, appetite and emotions.
- Regulates hormones from pituatary gland
- Monitors par/sympathetc nervous systems
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What are the meninges?
Layers that protect the brain.
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What are the layers of the meninges?
1. Dura mater
2. Arachnoid membrane
3. Pia mater
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What is the chemical released at the ends of nerve cells?
acetylcholine
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Where do afferent nerves send messages to?
Towards the brain and the spinal cord.
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What is the middle layer that surrounds the brain and spinal cord?
Arachnoid membrane
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What does the axon do?
Carries impulse along a nerve cell.
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Where is the brainstem and what does it do?
Posterior side of the brain; connects the cerebrum with the spinal cord.
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What moves throughout the brain and spinal cord?
cerebrospinal fluid
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What is the largest part of our brain?
The cerebrum
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In a nerve cell, what part of its structure receives the impulse first?
Dendrites
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Where does the efferent nerve send the messages?
Away from the brain, towards the body.
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What does the myelin sheaths do?
Speeds impulse conduction.
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The thin, delicate inner membrane of the meninges is the:
pia mater
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What is the combining form of cerebellum?
cerebell/o
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What is the combining form of cerebrum?
cerebr/o
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What is the combining form of dura mater?
dur/o
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What is the combining form of brain?
encephal/o
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What is the combining form of membranes/meninges?
mening/o or meningi/o
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What is the combining form of muscle?
my/o
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What is the combining form of spinal cord?
myel/p
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What is the combining form of excessive sensitivity to pain?
alges/o or -algesia
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What is the suffix for pain?
-algia
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What is the combining form of burning?
caus/o
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What is the combining form of deep sleep?
comat/o
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What is the combining form of feeling or nervous sensation?
ethesi/o or -esthesia
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What is the combining form of movement?
kines/o, -kinesia, -kinesis, kinetic
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What is the combining form of word, phrase?
lex/o
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What is the suffix for seizure?
-lepsy
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What is the suffix for paralysis?
-plegia
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What is the suffix for speech?
-phasia
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Which term means nerve pain?
Neuralgia
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Which type of hematoma occurs between the skull and the dura as a result of a ruptured meningeal artery, usually after a fracture of the skull?
epidura
