Overview
____________ are excitable cells that respond to stimuli by conducting impulses to transmit signals
Neurons
______________ is the life support of the neuron containing the nucleus and most organelles.
Soma (cell body)
This type of neuron has more than 3 processes (1 axon and 2 or more dendrites).
Multipolar
The ___________ is the largest part of the brain. It is made of left and right hemispheres, and also divided into 4 lobes.
Cerebrum
Which division of the PNS receives sensory stimuli to send back to CNS/brain?
Sensory (Afferent)
______________ are supportive cells that provide nutrition, insulation, and help with signal transmission.
Neuroglia (glial cells)
___________ are the main receptor of signals; input region.
Dendrites
______________ neurons have 1 process, dividing from the cell body like a T.
Unipolar
The _____________ maintains posture and balance. It coordinates timing and patterns for smooth and agile subconscious movements.
Cerebellum
Which division of the PNS sends out information from the brain to effector organs like muscles?
Motor (Efferent)
______________ receives stimuli via millions of sensory receptors throughout the body.
Sensory Input
_____________ generates and transmits nerve impulses; the conducting region.
Axon
________________ transmit info from sensory receptors to the CNS.
Sensory neurons (afferent neurons)
The _______________ coordinates a lot of automatic functions like respiration, circulation, body temperature, sleep, digestion, and swallowing.
Brainstem
Which part of the motor division of the PNS conduct impulses from CNS to skeletal muscles and controls voluntary movements?
Somatic
____________ activates effector organs to cause a response.
Motor Output
_________________ is the end of the axon that releases neurotransmitters at a synapse when a nerve impulse is received.
Axon terminals
__________________ transport info from CNS to the rest of the body.
Motor neurons (efferent neurons)
What are the 4 lobes of the brain?
Frontal, Parietal, Temporal, Occipital.
Which part of the motor division of the PNS conduct impulses from CNS to smooth muscles, cardiac muscles, and glands? It controls involuntary movements of the heart, lungs, stomach, etc.
Autonomic
____________ processes the input stimuli and decides what should be done.
Integration
_____________ covers long axons to protect and electrically insulate them to increase the speed of nerve impulse transmission.
Myelin sheath
_________________ are housed in the CNS and transport info between the sensory and motor neurons
Interneurons (association neurons)
The brain is protected by the skull and surrounded by layers of tissue and ____________ that cushion the brain from injury.
cerebrospinal fluid
In your autonomic nervous system the __________ division is called the “rest and digest”. It maintains your body and conserves energy for later.
Parasympathetic