BIOM 2000 Lecture Notes - Lecture 3: Myocyte, Endomysium, Epimysium

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Week 4: Chapter 6: Page #181-195:
Unit 3: Muscles: Chapter 6: The Muscular System:
Essential function of muscles: 1. Contraction and 2. Shortening. Both of these
are responsible for essential all body movement.
Overview of Muscle Tissues: Muscle Types:
3 Types of Muscle Tissues: 1. Skeletal Muscle, 2. Cardiac Muscle, 3. Smooth
Muscle. The 3 types are different in cell structures, body location, and how
they’re stimulated to contract.
Similarities of the 3 Muscle Types:
-Skeletal and smooth muscle cells are elongated and they’re called muscle
-Ability for muscles to shorten or contract.
-Terminology: prefixes of myo- and mys- (“muscle”) and sacro- (“flesh”) is when
the muscle is being referred to such as muscle cells=cytoplasm=sacroplasm.
Types of Muscle Types in detail:
1. Skeletal Muscle:
-Packaged into organs called skeletal muscles that attaches to the body’s
-Helps to form smoother, contours of the body. They’re huge, cigar-shaped,
multinculeate cells, it is the largest one out of the fiber types.
-These muscles are only activated by reflexes.
-These muscles contract rapidly, they must rest after short periods of activity.
-This muscle can also be known as striated muscle based on it’s obvious stripes
and voluntary muscle because, it is the only muscle type that is subject to
Key Words:
-Endomysium: is when every muscle fiber is enclosed in a connective tissue
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