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This muscle helps to regulate breathing.
What is the diaphragm?
Small, spindle shaped, non-striated muscle that is involuntary (autonomic).
What are smooth muscles?
Long, thin fibers that connect motor neurons to the muscle fibers in the motor unit.
What are axons?
Unit of bundled muscle fibers.
What is a fascicle?
These large, powerful muscles surround the shoulder to maintain stability and integrity of the joint.
What are upper limb muscles?
These attach to bones and are responsible for voluntary body movements, and maintaining upright body posture.
What is skeletal muscle?
An individual skeletal muscle cell.
What is a muscle fiber.
The ability of a muscle to produce tension over a period of time.
What is muscular endurance?
A nerve that stimulates skeletal muscle.
What is a motor neuron?
End of a muscle that attaches to a bone that typically moves as a result of contraction.
What is an insertion?
The link between the axon terminals and muscle fibers.
What is a neuromuscular junction?
The role of a muscle that moves bone.
What is an agonist?
Of Facial, Chewing, Trunk, or Neck muscles, which one does not fit into the three groups of head and neck muscles.
What are trunk muscles?
These muscles function voluntarily and have prominent striations (cross-stripes).
What are skeletal muscles.
Near the muscle, the axons branch into these, which then branch off to individual muscle fibers.
What are axon terminals?
A group of muscle fibers under the control of one motor neuron.
What is a motor unit?
The end of a muscle that attaches to a relatively fixed structure.
What is an origin?
Involuntary, striated muscle located solely in the walls of the heart.
What is cardiac muscle?
The main difference between facial muscles and most other muscles.
What is facial muscles connecting to other muscles or skin, whereas most other muscles are connected to bone?
The role of a muscle that opposes the movement of the agonist.
What is an antagonist?
Muscles found in the walls of many internal organs, such as the stomach, intestines, bladder, lungs, etc.
What are smooth muscles?
The three main muscle categories.
What are skeletal, smooth, and cardiac?
Matching behavioral properties.
Extensibility A. Respond to a stimulus
Elasticity B. Ability to stretch
Irritability C. Ability to snap back
Contractility D. Ability to shorten
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What is:
Extensibility - B. Ability to stretch
Elasticity - C. Ability to snap back
Irritability - A. Respond to a stimulus
Contractility - D. Ability to shorten
These muscles provide stability for the vertebral column, aid in spright posture, enable flexion, extension, hyperextension, lateral flexion, and rotation of the head and trunk.
What are trunk muscles?
Law stating that an action potential always causes the entire motor unit’s muscle fibers to contract.
What is the All-or-None Law?