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Muscles of the Body
Learn about the muscles of the body
13
Anatomy
Undergraduate 1
05/06/2015

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Cards

Term
What are the three types of major muscle tissue?
Definition

Skeletal or striated

Smooth or nonstriated

Cardiac

Term
How much of total body weight do muscles make up?
Definition
Muscles make up 35-45% of total body weight.
Term
What does skeletal (striated) muscle look like?
Definition
Striated muscle has alternating bands of light and dark bands when viewed under a microscope. It is made of long bands that form bundles.
Term
What system in the body controls skeletal muscle?
Definition
Skeletal muscle is under the control of the voluntary nervous system.
Term
What are the functions of the skeletal muscle?
Definition

The functions of the skeletal muscle are:

Movement

Maintenance of posture

Heat Production

Term
Which muscle is made up of branched cells with many nuclei that are interwoven forming thick spiral bands around the ventricles of the heart?
Definition
Cardiac Muscle
Term
Sinoatrial Node
Definition
Produces slow rhythmic contraction of the heart, it is also know as the Cardiac Pacemaker.
Term
Smooth Muscle
Definition
Made up of long cells, arranged in bundles each with a single nucleus. It is found in the hollow structures such as the digestive tract, urinary bladder and uterus.
Term
What are some of the functions of smooth muscle?
Definition
To alter the size of hollow organs - vasodilatation, or to move the contents along in the organ they are in, peristalsis contractions.
Term
What is the origin of the muscle?
Definition
It is the end of the muscle connected to the bone that is fixed.
Term
What is the insertion of the muscle?
Definition
It is the end of the muscle that attaches to the bone that moves.
Term
What causes muscles to shorten when chemically activated?
Definition
Nerve stimulus
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