Download Chap 9 Muscle Tissue Intro

Review lecture notes. Review Wrap-up practice questions.
Study diagrams discussed today.
Chap 9 Muscle Tissue
Intro
Learning Objectives:
1. Compare & contrast the basic types of muscle
tissue.
2. Describe the characteristics of
each muscle type.
3. Explain the effects of high intensity resistance
exercise on skeletal muscle.
What Type of Training Produces
Muscle Hypertrophy (“Bulk”)?
DISCUSSION
• Besides skeletal muscle (like we’ve seen
on the previous slide), what are the other
types of muscle in the body? Where are
these other types found?
Muscle Overview
• Three types of muscle tissue: _______,
______________, and ___________.
These differ in structure, function, and
location.
• “Mus” (in the word muscle) means
_________________ in Latin
• “Myo” or “Sarco” refers to ________
Muscle Similarities
• Skeletal and smooth muscle cells are
elongated and are called _____________.
• Muscle contraction depends on two kinds
of myofilaments – _____ and _______.
• Muscle terminology is similar
– Sarcolemma – muscle plasma __________
– Sarcoplasm – __________ of a muscle cell
Characteristics of Muscle Tissue
• _________ or irritability – the ability to
receive and respond to stimuli
• _________ – the ability to shorten forcibly
• __________ – the ability to be stretched or
extended
• __________ – the ability to recoil and
resume the original resting length
Muscle Functions
• Skeletal muscles are responsible for all
___________
• ________ muscle is responsible for coursing the
blood through the body
• ________ muscle helps maintain blood
pressure, and squeezes or propels substances
(i.e., food, feces) through organs
• Muscles also maintain ________, stabilize
_______, and generate heat
Quick Check
1. What are the 3 types of muscle tissue?
Muscles functions include maintaining
________, stabilizing _______, and generating
_______
2.
Skeletal Muscle
• Packaged in skeletal muscles that attach to
and cover the bony _________
• Has obvious stripes called _________
• Is controlled _________ (i.e., by conscious
control)
• Contracts ______ but tires _______
• Is responsible for overall body _________
• Is extremely adaptable and can exert forces
ranging from a fraction of an ounce to over
__ pounds
Skeletal Muscle continued
• Each muscle is a discrete ________ composed
of muscle tissue, blood vessels, nerve fibers, and
connective tissue
• The three connective tissue sheaths are:
– ____mysium – fine sheath of connective tissue
composed of reticular fibers surrounding each muscle
fiber
– _____mysium – fibrous connective tissue that
surrounds groups of muscle fibers called fascicles
– ____mysium – an overcoat of dense regular
connective tissue that surrounds the entire muscle
Label your
practice
diagram with
the 3
connective
muscle
sheaths
(circles in red)
plus striations
Striations
(stripes)
Skeletal Muscle
• Each ________ is served by one nerve,
an artery, and one or more veins
• Each skeletal muscle fiber is supplied with
a nerve ending that controls __________
• Contracting fibers require continuous
delivery of oxygen and nutrients via
________
• Wastes must be removed via ______
Skeletal Muscle Attachments
Most skeletal muscles span joints and are attached to
bone in at least two places.
______ - the point
or mode of
attachment of a
skeletal muscle to
bone or other body
part that moves
• ________ - end of
the muscle that is
attached to a bone
that does not move
when the muscle
contracts
Muscle Attachment continued
Muscles attach:
– __________ – epimysium of the muscle is
fused to the periosteum of a bone
– __________ – connective tissue wrappings
extend beyond the muscle as a tendon
Quick Check
1. What are striations?
2. The name of the muscle sheath surrounding the
entire muscle?
Microscopic Anatomy of Skeletal Muscle
Label the sarcolemma and myofibril only.
- muscle
plasma membran
- densely packed,
rodlike contractile
elements that make
up most of the muscle
volume
Smooth Muscle
- Composed of spindle-shaped fibers with no
_______________
- Have ________________ only (not other connective
sheath layers)
- Found in walls of hollow organs (except the heart)
- Have essentially the same contractile mechanisms as
skeletal muscle
Cardiac Muscle
•
•
•
•
Found in the walls of the _________
Branching chains of cells with __________
Endomysium is attached to the heart
___________ control
Chap 9 Wrap-Up Practice
• Complete the following questions for class
discussion now. (*see handout)
• Estimated time 10 – 12 minutes.