Nervous Systems Flashcards
What is a nervous system?
a network of nerve cells and fibers which transmits nerve impulses between parts of the body
name the two types of nervous systems in the human body
central and peripheral
what are neurons?
They are cells of the brain, spinal cord and nerves.
what do neurons transmit?
nerve impulses
dendrites send impulses and axons receive them. True or false?
false. dendrites receive impulses and axons send them.
what makes up you central nervous system?
brain and spinal cord
how many hemispheres does your brain have?
2
what does your brain do in relation to the nervous system?
It analyzes and makes sense of information (nerve impulses) to stimulate muscles.
I’m a long string of nerves. What am I?
spine
what does the spine do?
transmits messages from the brain to the motor nerves. It also transmits information from the sensory nerves to the brain.
what is the peripheral nervous system and what does it do?
It includes all nerves in the body and it transports nerve impulses from the senses to the brain and from the brain to the muscles.
what is a reflex?
A reflex action involves a simple nervous pathway called a reflex arc . It starts off with receptor cells being excited and then sending a signal along a sensory nerve to the spinal cord, which then passes it along to a motor nerve.
what are the three stages of voluntary movement?
planning
initiation
execution
describe the process of a voluntary movement
Prefrontal cortex → Intention→pre + supplementary motor areas→ program required movements→cerebellum & basal ganglia→checks and modulates→motor cortex→parietal cortex→ feedback→spinal cord→muscles.
