MTB 111
Endocrine System.
Sensory input and motor output are functions of what body system?
The Nervous System.
The brain and spinal cord make up what portion of the nervous system?
The Central Nervous System. (C.N.S.)
What fatty coverings around neurons insulate and increase conduction of impulses?
Myelin.
Nodes of Ranvier are gaps between what structures?
What receives stimuli and initiate nerve impulses?
Dendrites.
What is a chemical messenger that transfers an impulse from one neuron to another neuron, muscle, or gland?
A pathway involving a protective, involuntary response is known as what?
A Reflex Arc.
What classification of nerve sends an impulse toward a muscle, gland, or sensory unit?
Efferent Nerves.
What type of nerve sends an impulse toward the C.N.S.?
Afferent Nerve.
Synaptic vesicles contain what?
Neurotransmitters.
What sends impulses away from neuron cell bodies?
Axons.
Acetylcholine. (ACH)
What connective tissue covers the components of the central nervous system?
Meninges.
What are the layers of the meninges from superficial to deep?
Dura Mater, Arachnoid Mater, and Pia Mater.
What substance provides nutrients to the brain and spinal cord?
Cerebrospinal fluid.
What are the four main portions of the brain?
The Cerebrum, The Cerebellum, The Diencephalon, and the Brain Stem.
What is the largest portion of the brain?
The Cerebrum.
A network of nerves is assigned this label.
A Plexus.
There are how many pairs of spinal nerves?
Thirty - One (31)
The inferior portion of the brain stem is called what?
Medulla Oblongata.
What gland regulates the autonomic nervous system?
The Hypothalamus.
What is the largest portion of the diencephalon and relays sensory information to the cerebrum?
The Thalamus.
Where are the thalamus and hypothalamus located?
The Diencephalon?
This plexus innervates with the chest, shoulders, and upper extremities.
The Brachial Plexus.
A single sensory spinal nerve innervating an area of skin is called what?
A Dermatome.
Give three examples of things regulated by the Autonomic Nervous System.
Organs, Glands, and Smooth Muscles.
The parasympathetic nervous system stimulates the "rest and blank" response.
Rest and Digest.
What aspect of the autonomic nervous system is commonly called "Fight or Flight?
Sympathetic Nervous System.
What receptors are involved in regulation of balance through spatial orientation?
Mechanoreceptors.