U3KA1 Flashcards
What is the structure of the nervous system?
central nervous system (CNS) and peripheral nervous system (PNS)
What does CNS (central nervous system) consist of?
the brain and the spinal cord.
What does PNS (peripheral nervous system) consist of?
somatic nervous system (SNS) and autonomic nervous system (ANS)
What does SNS enable?
conscious movement and perception of stimuli.
What are examples of things the SNS is responsible of?
Contraction of skeletal muscle to move arms or legs, detecting a surface is hot or cold.
What type of neurons that SNS contain?
sensory and motor neurons
How do sensory neurons work in SNS?
they take impulses from sense organs to the CNS
How do motor neurons work in SNS?
they take impulses from the CNS to muscles and glands.
What are the two branches that are divided in ANS?
sympathetic and parasympathetic
The sympathetic and parasympathetic nervous system work _________ to maintain proper function of the body.
antagnostically
What does the sympathetic nervous system prepares the body to do?
For action.
What is the response of the sympathetic nervous system called and how does it affect the body?
‘fight or flight’ response, it increases heart and breathing rate while decreasing peristalsis for digestions and secretion of intestinal fluids.
What does the parasympathetic nervous system allow the body to do?
For the body to relax and carry out other life-necessary functions.
What is the response of parasympathetic nervous system also known as and how does this affect the body?
‘rest and digest’, this causes the heart and breathing rate to decrease, and a peristalsis increase as well as secretion of intestinal fluids.
What are the different structure and functions of the neural pathways?
they allow nervous signals to pass along correct routes to and from the CNS allowing for fine motor control, repeated actions and increased sensitivity.
