Bio Chapter 10
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What are the three types of muscles tissue
- 1) skeletal muscle tissue
- 2) Cardiac muscle tissue
- 3) smooth muscle tissue
Describe and name where Skeletal muscle can be found
Skeletal muscle is cylindrical shape and can be found in tendons
Describe and name where Cardiac muscle can be found
Cardiac muscle looks like branched cylinder and can be found in heart.
Describe and name where smooth muscle can be found.
smooth muscle is spindled shaped and can be found in blood vessels
What are the four properties of muscle tissue?
- 1) electrical excitability
- 2) contractility
- 3) extensibility
- 4) elasticity
What are the four main functions of muscle tissue?
- 1) body movement
- 2) stabilize body
- 3) store and release substance
- 4) generate heat
Define motor unit
a somatic motor neuron, plus all skeletal muscle it stimulats
What is the sequence of events that produces a contraction
- 1) ATP hydrolysis
- 2) attachment of myosin to actin to form cross-bridges
- 3) power stroke
- 4) detachment of myosin from actin
What factor controls the amount of force deleloped in a contraction
the amount of cross-bridges
What is a twitch?
a brief contraction of all the muscle fibers in a motor unit
Describe the events of a twitch contraction
- 1) latent period- Ca++ delay
- 2) contraction period
- 3) relaxation period
Describe the events occuring in a wave summation
second stimuli causes a stronger contraction due to the residue of Ca++ left from last stimuli
Describe unfused tetanus contraction
a sustained but wavering contraction
Describe a fused tetanus contraction
a sustained contraction
What does the term recruitment mean?
the number of active motor units increases
What is muscle tone? and how is it produced?
a small amount of tention in the muscle due to weak, involuntary contraction of motor units
What are the 3 sytems for generating ATP
- 1) Creatine phophate
- 2) Anaerobic
- 2) Aerobic
What is meant by oxygen debt?
The added oxygen over and above resting consumption
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