Nervous System Exam Flashcards
(49 cards)
Neuron that has no myelin along its axon
Gray matter
Chemical messengers of the endocrine system
Hormones
Circulates between the layers of the meninges and cavities inside the brain and spinal cord, may play a role in my he regulation of some autonomic functions
Cerebral spinal fluid
Second largest part of the brain, compares the movements the body intends to make with the actual positioning muscles and joints
Cerebellum
Neurotransmitter that causes an influx of sodium causing the postsynaptic membrane to move closer to the threshold
Excitatory neurotransmitter
Blood-brain-barrier seperate a the nervous system itself from the __________ in the brain
Capillaries
Which part of the nervous system sends impulses to skeletal muscle?
Somatic
After sodium goes into the cell, the process when potassium channels open allowing potassium to diffuse out of the cell to return to its negative potential
Repolarization
What part of the mammalian brain is the largest and is associated with learning and intelligence?
Cerebrum
What division of the autonomic nervous system helps the body cope in emergency situations? (Fight or flight response)
Sympathetic system
Chemical messengers of the nervous system
Neurotransmitters
The passageway between the brain stem and cerebrum. Plays a role in temperature regulation, hunger, thirst, and rage/anger responses
Diencephalon
The ideal polarized state of a neuron
Resting state
The connection between the spinal cord and the rest of the body. Responsible for the maintenance of basic support functions(heart beating and respirations)
BRAIN STEM
“Master gland” of endocrine system
Pituitary gland
Three basic functions of nervous system
Sense, integrate, motor functions
What structure separates the capillaries in the brain from the nervous tissue and serves to prevent many drugs, proteins, ions, and hormones from entering the brain
Blood brain barrier
This connective tissue supplies a rich network of blood vessels that supply nutrients, oxygen and cushioning to the superficial tissues of the brain and spinal cord
Meninges
Which part of the nervous system sends impulses to smooth muscle, cardiac muscle, and the endocrine system?
Autonomic
A neurotransmitter that increases the negative charge within the postsynaptic membrane causing cell to move farther away from the threshold
Inhibitory neurotransmitter
When an impulse is received causing the sodium channels to open and allow only sodium into the cell (giving the inside of the cell a + potential)
Depolarization
Basic structural unit of nervous system
Neurons
Myelin sheath
Cell membrane of glial cells tightly wrapped around the axon
Efferent nerves
“Motor nerves”
Conduct impulses AWAY from CNS
