Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
20 Cards in this Set
- Front
- Back
|
Three Basic Funtions of the Nervous System
|
Sensory, Integrative, and Motor
|
|
|
Sensory Function
|
It senses certain changes (stimuli), both within your body (the internal environment), such as stretching of your stomach or an increase in blood acidity, and outside your body (the external environment), such as a raindrop landing on your arm or the aroma of a rose.
|
|
|
Integrative Function
|
It analyzes the sensory information, stores some aspects, and makes decisions regarding appropriate behaviors.
|
|
|
Motor Function
|
It may respond to stimuli by initiating muscular contractions or glandular secretions.
|
|
|
Neurology
|
the branch of medical science that deals with the normal functioning and disorders of the nervous system
|
|
|
Central Nervous System (CNS)
|
The portion of the nervous system that consists of the brain and spinal cord.
|
|
|
Peripheral Nervous System (PNS)
|
The part of the nervous system that lies outside the central nervous system-nerves and ganglia.
|
|
|
Sensory or afferent neurons
|
A neuron that conducts nerve impulses into the central nervous system
|
|
|
Motor or efferent neurons
|
A neuron that conducts nerve impulses from the brain and spinal cord to effectors that may be either muscles or glands.
|
|
|
Somatic Nervous System (SNS)
|
The portion of the peripheral nervous system consisting of somatic sensory (afferent) neurons and somatic motor (efferent) neurons.
|
|
|
Autonomic Nervous System (ANS)
|
Visceral sensory (afferent) and motor (efferent) neurons, both sympathetic and parasympathetic. Motor neurons transmit nerve impulses from the central nervous system to smooth muscle, cardiac muscle, and glands; so named because this portion of the nervous system was thought to be self-governing of spontaneous.
|
|
|
Sympathetic division
|
One of the two subdivisions of the autonomic nervous system, having cell bodies of preganglionic neurons in the lateral gray columns of the thoracic segment and first two or three lumbar segments of the spinal cord; primarly concerned with processes involving the expenditure of energy. Also called the thoracolumbar division.
|
|
|
Parasympathetic division
|
One of the two subdivisions of the autonomic nervous system, having cell bodies of preganglionic neurons in nuclei in the brain stem and in the lateral gray matter of the sacral portion of the spinal cord' primarly concerned with activities that conserve and restore body energy. Also called the craniosacral division.
|
|
|
Neuroglia or glia
|
Cells of the nervous system that perform various supportive functions. The neuroglia of the central nervous system are the astrocytes, oligodendrocytes, microglia, and ependymal cells: neuroglia of the peripheral nervous system include the neurolemmocytes (Schwann cells). Also called glial cells.
|
|
|
Astrocytes
|
A Neuroglial cell having a star shape that participates in brain development and the metabolism of neurotransmitters, helps form the blood-brain barrier and maintain the prper balance of K for generation of nerve impulses, and provides a link between neurons and blood vessels.
|
|
|
oligodedrocytes
|
A neuroglial cell that supports
|
|
|
microglia
|
Neuroglial cells carry on phagocytosis
|
|
|
gliomas
|
Brain tumors commonly derive form glia and these tumors tend to be highly malignant and they grow rapidly.
|
|
|
ependymal cells
|
Neuroglial cells that cover choroid plexuses and produce and produce cerebrospinal fluid (CSF); they also line the ventricles of the brain and probably assist in the circulation of CSF.
|
|
|
neurolemmocytes or Schwann cells
|
A neuroglial cell of the peripheral nervous system that forms the myelin sheath and neurolemma of a nerve fiber by wrapping around a nerve fiber in a jelly-roll fashion
|
