Anatomy Lecture Quiz 4
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Anatomy Lecture Quiz 4
Anatomy Lecture Chapter 13 Nervous System
Ch. 13 The Nervous System: Neural Tissue
Which 2 organ systems coordinate & direct activities of other organ systems?
Nervous & Endocrine
Functions of the nervous system?
- provides swift, brief responses to stimuli
- encompasses all
Function of endocrine system?
adjusts metabolic operations & directs long-term changes
Anatomical subdivisions of nervous system?
Central Nervous System (CNS)
- brain & spinal cord
Peripheral Nervous System (PNS)
- somatic, autonomic, & special visceral sensory receptors [neural tissues outside CNS]
Functional subdivisions of nervous system?
- transmits info from somatic & visceral receptors to CNS
- carries motor commands to muscles & glands
Efferent division includes?
Somatic Nervous System (SNS)
- voluntary control over skeletal muscle contractions
Autonomic Nervous System (ANS)
- automatic, involuntary regulation of smooth muscle, cardiac muscle, & glandular activity under control of parasympathetic & sympathetic
Classifications of receptors?
Somatic & Visceral
What are the 2 types of cells in a neural tissue?
- responsible for info transfer & processing
- supporting cells in nervous system
A typical neuron consists of?
(carries info in the form of nerve impulses
What are the 4 types of neuroglia/glial cells in the CNS?
- largest, most numerous glial cells
- maintains blood-brain barrier to isolate CNS from general circulation
- provides structural support for CNS
- regulates ion & nutrient concentrations
- perform repairs to stabilize tissue & prevent further injury
- wrap CNS axons in membrane sheath called
- gaps between myelin wrappings along axon are called
nodes of Ranvier
- large areas wrapped in myelin are called
- regions primarily containing myelinated axons appear glossy white & are called
- smallest nuroglial cells
- phagocytic cells that engulf cellular debris, waste products, & pathogens
- increase in number as a result of infection/injury
- atypical epithelial cells that line chambers & passageways filled w/
cerebrospinal fluid (CSF)
in brain & spinal cord
- assist in producing, circulating, & monitoring CSF
neuron cell bodies in PNS are clustered into
, & their axons form
Types of PNS glial cells?
1. satellite cells
2. Schwann cells
Function of satellite cells?
enclose neuron cell bodies in ganglia
Function of Schwann cells?
cover all peripheral axons, whether myelinated or unmyelinated
of neuron is cytoplasm surrounding nucleus
, & bundles of neurofilaments - termed
- which extend into dendrites & axon
, specialized region of axon; connects
of axon to cell body; cytoplasm of axon is
& contain numerous organelles
side branches from axon
- series of fine, terminal extensions branching from axon tip
- end at
site of intercellular communication between neuron & another cell
Location of synaptic knob?
located where 1 neuron synapses on another
Synaptic communication involves?
release of specific chemicals called neurotransmitters
Structural classification of neurons?
- no distinguishable axon
- 1 dendrite & 1 axon
- dendrite & axon are continuous @ 1 side of cell body
- several dendrites & 1 axon
What are the 3 functional categories of neurons?
- form afferent division of PNS & deliver info from sensory receptors to CNS
- receptors are categorized as exteroceptors (provide info from external environment)
(monitor position & movement of joint)
(monitor digestive, respiratory, cardiovascular, urinary, & reproductive systems