nervous system test Flashcards
CNS
the main centre for the entire nervous system compromised of the brain and spinal cord
Myelinated neurones
form white matter which forms the inner region of the brain and outer area of spinal cord
Unmyelinated neurons
form grey matter which is found around the outsides of the brain and forms the H shaped core of the spinal cord
where are sensory and motor nerves found?
within the spinal cord
how many cells are in the brain?
over 100 billion
what protects the brain and spinal cord?
3 layers of meningee
what are the 3 regions of the brain?
- hindbrain
- midbrain
- forebrain
Blood brain barrier:
is formed by glial cells, endothelial cells and blood vessels
cerebrospinal fluid:
is a dense, clear liquid that transports hormones, white blood cells, and nutrients across the blood brain barrier to cells of brain
Cerebral cortex
is responsible for language, memory, personality, vision, and emotion
corpus callosum
sends messages from one hemisphere to another
the left brain is associated with…
sequential and logical ways of thinking, and mathematical skills
the right brain is associated with…
holistic and intuitive thinking, artistic abilities
the frontal lobe of the brain is involved with..
movement, decision making, problem solving, and planning
what are the brains 4 lobes?
frontal, parietal, temporal, and occipital
the parietal lobe of brain is involved with…
the reception and processing of sensory information from the body
the occipital lobe of the brain is…
the main centre for visual processing
the temporal lobe is involved with…
memory, emotion, hearing, and language
cerebellum
is located below the cerebrum, and is involved in the unconscious coordination of posture, reflexes, body movement, and voluntary motor skills
medulla oblongata
- helps regulate breathing, heart, and blood vessel function.
- its the centre for respiration and circulation
pons
serves as a relay centre between the neutrons of the right and left halves of the cerebellum, cerebrum and rest of the brain
midbrain
processes information from sensory neutrons in the eyes, ears, and nose
- relays visual and auditory information
cerebrum
contains the centres for learning, memory, conscious and language
thalamus
provides connections between various parts of the brain
hypothalamus
controls blood pressure, heart rate, and body temp.
corpus collosum
sends messages from one hemisphere to another
pituitary gland
produces critical hormones that control various bodily functions
peripheral nervous system
- refers to all of the neurones that lead to and from the central nervous system
- is divided into 2 groups
what are the groups PNS is divided into?
somatic and autonomic nervous system
somatic nervous system
nerves in this system will relay information from the sensory receptors to the central nervous system then relay that info from the CNS to the skeletal muscles which is usually involuntary
autonomic nervous system
carries impulses from the CNS to the heart and other internal organs
sympathetic nervous system
- is most active when your body is under stress
- fight or flight responses
parasympathetic nervous system
most active when the body is at rest
