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Chapter 8: Muscular System

Terms in this set (35)

The skeletal muscle is under involuntary control.

True

False
False
A ligament indirectly attaches skeletal muscle to bone.

True

False
False
The cytoplasm of a muscle fiber is the sarcolemma.

True

False
False
Calcium is a neurotransmitter responsible for muscle contractions.

True

False
False
Oxygen must be present for aerobic respiration to occur.

True

False
True
Bending the elbow is an example of flexion.

True

False
True
The obicularis oculus is used to wink, blink, and squint.

True

False
True
The diaphragm forms a partition between the thorax and abdomen.

True

False
True
The deltoid muscle moves the shoulder and upper arm.

True

False
True
Another name for the calcaneal tendon is the ankle.

True

False
False
There are three types of muscle tissue, but only one type is under voluntary control, namely
Skeletal muscle.
What type of muscle is found in the organs of the gastrointestinal tract?
Smooth muscle
In what organ is cardiac muscle found?
Heart
What type of muscle is found in the arteries of the cardiovascular system?
Smooth muscle
Skeletal muscle makes up ____% of body weight.
40%
What body system is coordinated with the muscular system?
Skeletal system
The muscle's ability to receive and respond to a stimulus from the nervous system is the
Excitability
The muscle's ability to shorten or contract to produce movement is the
Contractility
The muscle's ability to be stretched or extended is the
Extensibility
The muscle's capacity to recoil or return to the original shape and length after contraction or extension is the
Elasticity
One way to describe the characteristic of excitability is to say the cells or tissues are
On alert
Muscle contraction fulfills four functions in body; Movement, Posture, Joint stability and
Heat production
________% of the heat produced in the body result of muscle contraction.
85%
The connective tissue heath that surrounds a muscle is called
Epimysium
The connective tissue outside the epimysium is the
Fascia
The fibrous connective tissue that surrounds a fasciculus is the
Perimysium
Each individual muscle cell is called a
Muscle fiber
The connective tissue that surrounds an individual muscle fiber (cell) is the
Endomysium
The cytoplasm of a muscle fiber (cell) is called
Sarcoplasm
_________ is necessary to transmit the nerve impulses to tell muscle fibers to contract.
Calcium
Why do skeletal muscle cells have numerous mitochondria?
because muscle cell needs energy for contraction
˜Before a skeletal muscle fiber can contract, must receive an impulse from a
nerve cell
Adenosine triphosphate (ATP) is the chemical that produces energy within the muscle cell mitochondria. Energy production requires a constant supply of
nutrients and oxygen
Fibers of the epimysium fuse directly with the periosteum of a bone. This is called
Direct attachment
Epimysium, perimysium, and endomysium have what type of skeletal muscle attachment?
Indirect attachment
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