Nervous System Flashcards
What is the anatomy of the nervous system?
Brain
Spinal cord
Sensory organs
Peripheral nerves
What are the functions of the nervous system?
•Directs immediate responses to stimuli
•Coordinate and moderates the activities of other organ systems
•Provides and interprets sensory information about external conditions
What are the two main parts of the nervous system?
CNS- includes the brain and the spinal cord. Information processing
PNS- includes the nerves outside of the brain and the spinal cord. PNS feeds information into your brain from most of your senses. It carries signals that allow you to move your muscles.
What is the automatic and somatic nervous responsible for and comprised of?
The autonomic nervous system controls internal organs and glands. Involves smooth muscle,cardiac muscle,glands, adipose tissues
somatic nervous system controls muscles and movement. Involves skeletal muscles
What is the anatomy of the brain?
The three main parts
Cerebellum(back of head)
Cerebrum(front of brain contains the lobes)
Brain stem(middle of brain contains the medulla)
What are the lobes of the brain?
Frontal: largest lobe involves personality,making decisions, and movement
Parietal: behind frontal lobe involves identifying objects, interpreting pain and touch
Temporal: under the frontal lobe and parietal lobe involves in short term memory,speech, and smell
Occipital: behind the temporal lobe involves vision
What are the sympathetic and parasympathetic nervous systems and their functions?
Sympathetic ns involves fight or fight responses and prepares the body for physical activity
Parasympathetic ns involves rest and digest functions relaxes the body
What are neurons?
Nerve cells that send signals all over your body that allows you to breathe, talk, eat, walk, and think
Describe synaptic transmission?
is the process by which one neuron communicates with another. Information is passed down the axon of the neuron as an electrical impulse known as action potential.
Describe nerve impulses?
a signal transmitted along a nerve fiber. It consists of a wave of electrical depolarization that reverses the potential difference across the nerve cell membranes.
What is the difference between resting and action potential?
The resting potential tells about what happens when a neuron is at rest. An action potential occurs when a neuron sends information down an axon, away from the cell body.
