Science GA 2.1 Nervous Flashcards
-Interprets all the activities that happen in the body
-It enables you to move, think, laugh, feel pain, or savor the food
-It makes your body respond quickly to changes in the environment by accomplishing four basic functions
Nervous System
-The flow of ions through the membranes of neurons, particularly the nerve fibers
The Nerve Impulse
What are the types of neurons
Sensory Neuron
Relay Neuron Interneuron
Motor Neuron
-Input
-Finger-like projections that receive sensory input and transmit the signal through the axon to the cell body
Sensory Neuron
-Processing
-Are found in the brain and spinal cord and allow sensory and motor neurons to communicate
Relay Neuron Interneuron
-Output
-These neurons transmit impulses from the spinal cord to skeletal and smooth muscles (such as those in your stomach), and so directly control all of our muscle movements
Motor Neuron
The site of transmission of electric nerve impulses between two nerve cells (neurons) or between a neuron and a gland or muscle cell (effector)
Synapse
X-Is made up of the brain and spinal cord
The Central Nervous System
X-Is made up of nerves that branch off from the spinal cord and extend to all parts of the body
Peripheral Nervous System
-XA subdivision of your peripheral nervous system, which is all of your nervous system except your brain and spinal cord
A
llows you to move and control muscles throughout your body
-Voluntary control of body movements via skeletal muscles
Somatic Nervous System
X-Your ————- nervous system is a network of nerves throughout your body that control unconscious processes
-These are things that happen without you thinking about them, such as breathing and your heart beating
Automatic Nervous System
X-Controls “fight-or-flight” responses. In other words, this system prepares the body for strenuous physical activity
Sympathetic
X-System regulates “rest and digest” functions
Parasympathetic
-A synaptic connection between a neuron and a muscle cell is called a
Neuromuscular Junction
