Nervous System Test 6 Flashcards
What does the nervous system do?
The body’s control center and communication network.
It directs the functions of the bodies organs and systems
What does the central nervous system consist of
The brain and the spinal cord
What are Schwann cells
They form myelin sheaths around nerve fibers in the  (PNS).
What are synapses
Areas where the terminal branches of an axon are anchored close to , but not touching the ends of the dendrites of another neuron.
What are neurotransmitters
Neurotransmitters are your bodies chemical messengers that carry messenges from one nerve cell to a target cell
The spinal cord is a continuation of what
The medulla oblongata
How many pairs of cervical nerves are there
8 pairs
What is a neuron
Nerve cells that transmits impulses
What is the name of the fluid that serves as a shock absorber for the CNS
Cerebrospinal fluid
What is the pineal gland
Is a pinecone-shaped endocrine gland that secretes melatonin, which affects our moods and behavior.
What does the occipital lobe do
Functions and receiving interpreting visual input
What does the sympathetic division do
It is part of the ANS fight or flight increased breathing and heart rate
What does the parasympathetic division do
Part of the ANS returns to normal and slows breathing and heart rate
Describe the sclera
The outermost layer of the wall of the eye. The white of the eye. Sclera is hard and gives the shape.
Describe the iris
Colored part of the eye. Sits behind your eye and it controls the amount of light that goes in.
