Nervous System 1
Basic structure of Nervous System
Neuron
Motor Neurons (Afferent or Efferent?)
Efferent
Unmyelinated neurons
gray matter
How many pair of cranial nerves are there
12
How many pair of spinal nerves
DAILY DOUBLE
31
What structure conducts impulses toward the cell
Dendrite
The part of the peripheral nervous system that brings information to the central nervous system. (Afferent or Efferent?)
afferent division
Sensory neurons of the PNS enter the CNS through which part of the spinal cord?
DAILY DOUBLE
Dorsal Root Ganglion
I send signals to the motor neurons, I am the
Central Nervous System
Two divisions of autonomic nervous system
sympathetic and parasympathetic system
What structure conducts impulses away from the cell
Axon
Two main divisions of Nervous System
Central and Peripheral
What are the 3 parts of the diencephalon?
Thalamus
Hypothalamus
Epithalamus
What are the 4 spinal nerve plexuses?
DAILY DOUBLE
Cervical
Brachial
Lumbar
Sacral
1 dendrite and 1 axon with cell body between them (polarity)
Bipolar neuron
What structure processes the impulses?
Cell body
Involuntary Subdivision of PNS
DAILY DOUBLE
Autonomic Nervous System
Fight or Flight
Sympathetic
White Matter
myelinated neurons
They have opposing effects on the same organs
Steps of a reflex arc in the correct order
receptor, sensory neuron, interneuron, motor neuron, effector
Consists of brain and spinal cord
central nervous system
Neurotransmitters are released from
synapses
Example of parasympathetic system
Resting & Digesting
The ANS is part of the _______system
Peripheral
What are the 3 mechanical forms of protection for the CNS?
Skull
Meninges
Cerebrospinal Fluid
part of the neuron that receives signals
dendrite
Voluntary control of skeletal muscles is provided by
Somatic nervous system
What are the first 3 cranial nerves in the correct order?
Olfactory
Optic
Oculomotor
Ability to respond to a stimulus
Irritability
after an action potential is propagated, which one of the following ions rapidly diffuses out of the cell into the tissue fluid?
DAILY DOUBLE
Potassium
Impulse conduction is faster in neurons that are ________
Myelinated
Rick quickly pulled his hand away from the hot stove. What type of reflex is this?
somatic reflex
The midbrain, pons, and medulla oblongata are housed in the ________
Brain stem
What is the main difference between the somatic nervous system and the autonomic nervous system?
Patterns of motor pathways