Final Study Guide Flashcards
(197 cards)
- Describe the anatomical differences between:
Skeletal Muscles
Smooth Muscles
Cardiac Muscles
Describe the anatomical differences between:
- Skeletal muscles- muscle attached to bone through its tendon, under voluntary control
- Smooth muscles- found in hollow structures of the body like the intestines; cannot be influenced at will
- Cardiac muscles- muscle found only in the heart
Which of the 3 muscle types are under voluntary & involuntary (autonomic nervous system) control?
Skeletal: voluntary, striated, multinucleated
Smooth: involuntary, nonstriated and uninucleated
Cardiac: involuntary, striated and uninucleated
Where are cardiac muscles found?
Cardiac muscles are found in the heart
Explain the current concept of muscle contraction based on three factors: neuroelectrical, chemical, and energy sources.
Watch video on this
elevation
raising a part of the body
flexion
bending or decreasing the angle between bone
pronation
moving the bones of the forearm so that the radius and ulna are not parallel
eversion
moving the sole of the foot outward at the ankle
What is muscle tone?
Muscle Tone is defined as a property of muscle in which a steady or constant state of partial contraction is maintained in a muscle.
Compare isotonic and isometric contractions
- Isotonic contraction- contraction in which tone or tension remains the same as the muscle becomes shorter and thicker.
- Isometric activity contraction in which a muscle remains at a constant length while tension against the muscle increases
Describe 3 different inflammatory muscle or joint conditions.
- TENDINITIS-
- PLANTAR FASCIITIS-
- MYOSITIS-
.TENDINITIS-
TENDINITIS- inflammation of a tendon.
PLANTAR FASCIITIS-
PLANTAR FASCIITIS- an inflammation of the connective tissue (fascia) that is part of the arches of the foot.
MYOSITIS-
MYOSITIS- inflammation of muscular tissue.
- Name the 2 major divisions of the nervous system.
- central nervous system
2. periphreal nervous system
the central nervous system
consists of the brain and spinal cord
Identify the two subcategories of the Peripheral Nervous System (PNS) and their components.
- Sensory (afferent)
2. Motor (efferent)
Identify the two subcategories of the Peripheral Nervous System (PNS) and their components.:
sensory components
1
Sensory neuron
a neuron in contact with receptors; it detects changes in the external environment; also called afferent neuron
Internuncial neurons
transmit the sensory impulse to the appropriate part of the brain or spinal cord for interpretation and processing; also known as association neurons
Motor neuron
Motor neuron neuron that connects with muscles or glands to bring about a reaction to a stimulus; also called efferent neuron
Explain how a neuron transmits a nerve impulse.
the all or none principle a nerve cell will either fire or not fire once the impulse begins it will continue down the cell.
impulse conduction in myelinated nerve fibers
myelinated surface prevents ion flow from the insulated membrane
impulse conduction unmyelinated nerve fibers
unmyelinated fiber conducts an impulse over its entire surface