![Page 1: Seminar 6 The Muscular System. Introduction Muscular tissue enables the body and its parts to move Movement caused by ability of muscle cells (called](https://reader036.vdocuments.mx/reader036/viewer/2022062517/56649eda5503460f94bea137/html5/thumbnails/1.jpg)
Seminar 6 The Muscular System
![Page 2: Seminar 6 The Muscular System. Introduction Muscular tissue enables the body and its parts to move Movement caused by ability of muscle cells (called](https://reader036.vdocuments.mx/reader036/viewer/2022062517/56649eda5503460f94bea137/html5/thumbnails/2.jpg)
Introduction Muscular tissue enables the body and its parts
to move Movement caused by ability of muscle cells
(called fibers) to shorten or contract Muscle cells shorten by converting chemical
energy (obtained from food) into mechanical energy, which causes movement
Three types of muscle tissue exist in body
![Page 3: Seminar 6 The Muscular System. Introduction Muscular tissue enables the body and its parts to move Movement caused by ability of muscle cells (called](https://reader036.vdocuments.mx/reader036/viewer/2022062517/56649eda5503460f94bea137/html5/thumbnails/3.jpg)
3 Types of muscle Skeletal Cardiac Smooth
![Page 4: Seminar 6 The Muscular System. Introduction Muscular tissue enables the body and its parts to move Movement caused by ability of muscle cells (called](https://reader036.vdocuments.mx/reader036/viewer/2022062517/56649eda5503460f94bea137/html5/thumbnails/4.jpg)
Structure and Function Cardiac:
involuntary; heart Smooth:
involuntary; linings Skeletal: voluntary;
attaches to bone
![Page 5: Seminar 6 The Muscular System. Introduction Muscular tissue enables the body and its parts to move Movement caused by ability of muscle cells (called](https://reader036.vdocuments.mx/reader036/viewer/2022062517/56649eda5503460f94bea137/html5/thumbnails/5.jpg)
Functions of muscle? Movement Posture Heat production
Let’s discuss how…
![Page 6: Seminar 6 The Muscular System. Introduction Muscular tissue enables the body and its parts to move Movement caused by ability of muscle cells (called](https://reader036.vdocuments.mx/reader036/viewer/2022062517/56649eda5503460f94bea137/html5/thumbnails/6.jpg)
Movement
How does this help us?
![Page 7: Seminar 6 The Muscular System. Introduction Muscular tissue enables the body and its parts to move Movement caused by ability of muscle cells (called](https://reader036.vdocuments.mx/reader036/viewer/2022062517/56649eda5503460f94bea137/html5/thumbnails/7.jpg)
Movement Biceps brachii –
synergist Triceps brachii -
antagonist
![Page 8: Seminar 6 The Muscular System. Introduction Muscular tissue enables the body and its parts to move Movement caused by ability of muscle cells (called](https://reader036.vdocuments.mx/reader036/viewer/2022062517/56649eda5503460f94bea137/html5/thumbnails/8.jpg)
Posture Posture or
muscle tone
![Page 9: Seminar 6 The Muscular System. Introduction Muscular tissue enables the body and its parts to move Movement caused by ability of muscle cells (called](https://reader036.vdocuments.mx/reader036/viewer/2022062517/56649eda5503460f94bea137/html5/thumbnails/9.jpg)
Heat Production
![Page 10: Seminar 6 The Muscular System. Introduction Muscular tissue enables the body and its parts to move Movement caused by ability of muscle cells (called](https://reader036.vdocuments.mx/reader036/viewer/2022062517/56649eda5503460f94bea137/html5/thumbnails/10.jpg)
Heat Production Requires ATP Contraction of muscle fibers produces heat
How relevant is this function???
![Page 11: Seminar 6 The Muscular System. Introduction Muscular tissue enables the body and its parts to move Movement caused by ability of muscle cells (called](https://reader036.vdocuments.mx/reader036/viewer/2022062517/56649eda5503460f94bea137/html5/thumbnails/11.jpg)
Muscle Tissue Function—all muscle cells specialize in
contraction (shortening) Contraction requires:
Stimulus (nerve) Muscle fiber Calcium ATP Chemical rxn No stimulus
Must occur in EACH muscle fiber All-or-none
![Page 12: Seminar 6 The Muscular System. Introduction Muscular tissue enables the body and its parts to move Movement caused by ability of muscle cells (called](https://reader036.vdocuments.mx/reader036/viewer/2022062517/56649eda5503460f94bea137/html5/thumbnails/12.jpg)
Figure 7-3, page 158
![Page 13: Seminar 6 The Muscular System. Introduction Muscular tissue enables the body and its parts to move Movement caused by ability of muscle cells (called](https://reader036.vdocuments.mx/reader036/viewer/2022062517/56649eda5503460f94bea137/html5/thumbnails/13.jpg)
![Page 14: Seminar 6 The Muscular System. Introduction Muscular tissue enables the body and its parts to move Movement caused by ability of muscle cells (called](https://reader036.vdocuments.mx/reader036/viewer/2022062517/56649eda5503460f94bea137/html5/thumbnails/14.jpg)
The Step Test
![Page 15: Seminar 6 The Muscular System. Introduction Muscular tissue enables the body and its parts to move Movement caused by ability of muscle cells (called](https://reader036.vdocuments.mx/reader036/viewer/2022062517/56649eda5503460f94bea137/html5/thumbnails/15.jpg)
Step Test Which type of muscle tissue is being used in
this test?
Answer the poll question ---
![Page 16: Seminar 6 The Muscular System. Introduction Muscular tissue enables the body and its parts to move Movement caused by ability of muscle cells (called](https://reader036.vdocuments.mx/reader036/viewer/2022062517/56649eda5503460f94bea137/html5/thumbnails/16.jpg)
Step Test, con’t Why do breathing and heart rate remain
elevated after exercise stops?
![Page 17: Seminar 6 The Muscular System. Introduction Muscular tissue enables the body and its parts to move Movement caused by ability of muscle cells (called](https://reader036.vdocuments.mx/reader036/viewer/2022062517/56649eda5503460f94bea137/html5/thumbnails/17.jpg)
Step Test, con’t Why would a “physically fit” person return to
normal breathing and heart rate levels more quickly than an unfit person?
![Page 18: Seminar 6 The Muscular System. Introduction Muscular tissue enables the body and its parts to move Movement caused by ability of muscle cells (called](https://reader036.vdocuments.mx/reader036/viewer/2022062517/56649eda5503460f94bea137/html5/thumbnails/18.jpg)
Step Test, con’t increased efficiency of the respiratory and
circulatory systems an increase in the number of blood vessels in
muscles more efficient delivery of oxygen and glucose
to muscle fibers more oxygen is available = the less “oxygen
debt” there will be in the muscles.
![Page 19: Seminar 6 The Muscular System. Introduction Muscular tissue enables the body and its parts to move Movement caused by ability of muscle cells (called](https://reader036.vdocuments.mx/reader036/viewer/2022062517/56649eda5503460f94bea137/html5/thumbnails/19.jpg)
Step Test, con’t Aerobic training also increases the number of
mitochondria in muscle fibers.
Why would this benefit the muscle contraction process?
![Page 20: Seminar 6 The Muscular System. Introduction Muscular tissue enables the body and its parts to move Movement caused by ability of muscle cells (called](https://reader036.vdocuments.mx/reader036/viewer/2022062517/56649eda5503460f94bea137/html5/thumbnails/20.jpg)
Step Test, con’t Mitochondria are cellular organelles that convert
glucose to ATP Contraction of muscle cells requires ATP Increase in the number of mitochondria in a muscle
cell increases the speed with which ATP is produced in the cell.
Mitochondria = ATP rate
![Page 21: Seminar 6 The Muscular System. Introduction Muscular tissue enables the body and its parts to move Movement caused by ability of muscle cells (called](https://reader036.vdocuments.mx/reader036/viewer/2022062517/56649eda5503460f94bea137/html5/thumbnails/21.jpg)
Step Test, con’t http://www.health.harvard.edu/newsweek/
Aerobic_Fitness_Test_The_Step_Method.htm
![Page 22: Seminar 6 The Muscular System. Introduction Muscular tissue enables the body and its parts to move Movement caused by ability of muscle cells (called](https://reader036.vdocuments.mx/reader036/viewer/2022062517/56649eda5503460f94bea137/html5/thumbnails/22.jpg)
Time for Q and A! Do you have any questions?