BIOS 252 Final Exam Study Guide- Chamberlain College

BIOS 252 Final Exam Study Guide
Chapter 10: Muscle Tissue



Skeletal Cardiac
Characteristic Smooth Muscle
Muscle Muscle



Attached to Lines organs, airways,
Location Heart
bones and blood vessels


Presence of
Yes Yes No
Sarcomeres/Striations


Voluntary Involuntary
Nervous Control
Involuntary


Presence of Intercalated
No Yes No
Discs



Speed of Contraction Fast Moderate
Slow




• Muscle Components (Tube inside a tube)

,• Muscle fiber- Functional Unit of Skeletal Muscle

, Myosin head movement
o ATP must be present for myosin head to bind to actin filament.
o ATP hydrolyzes to form ADP and Phosphate to hold myosin to actin.
o Phosphate releases and in turn releases energy to force the myosin
to

, pull the actin closer.
o Depleted ADP is replaced with fresh ATP

 Steps of Contractions




 Types of Muscle Metabolism
o Creatine phosphate- Lasts 15 seconds
o Anaerobic glycolysis- Lasts a couple minutes
o Aerobic Cellular Respiration- Lasts several minutes to hours
 Types of Contractions
o Isotonic Contraction- muscles contract and movement occur.
o Isometric Contraction- muscles contract, but no net movement
occurs.
 Skeletal Muscle Fiber Types o Slow Oxidative Fibers