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Chapter 11 Muscles

Muscle fiber and muscle contraction

QuestionAnswer
A myofilament that runs throughout the core of a thick filament and anchors it to a Z disc is called a(n) __________. Elastic Filament
All muscle types will respond to an electrical stimulus because all muscle cells are _________. Excitable
A deficiency of acetylcholine receptors leads to muscle paralysis in myasthenia gravis. True or False True
The protein that acts as a calcium receptor in skeletal muscle is __________. Troponin
An isometric contraction does not change muscle length. True or False True
As you are lifting a box, someone places extra weight on top of it. For your muscle to continue contracting and lifting the box, the muscle must __________. Recruit more muscle fibers
Which of the following would be caused by a contraction of smooth muscle? Goose bumps
Which of the following has the largest mitochondria? Cardiac muscle
Aerobic respiration produces approximately _________ more ATPs per glucose molecule than glycolysis does. 36
Which of the following is predominately made up of myosin? Thick Filament
A muscle cell contains numerous ________ to serve their high demand of ATP. Mitochondria "Powerhouse"
What marks the boundaries of a sarcomere? Z discs
Which muscle(s) can contract without the need for nervous stimulation? Cardiac and smooth muscles
What best describes the resting membrane potential (RMP) Positive charge or negative charge? Negative charge
Which ions has the most influence on the resting membrane potential (RMP)? K+ = Potassium
What does it mean when the voltage (electrical potential) of a plasma membrane shifts from +35mV to 0 or negative? Depolarization or Repolarization Repolarization
Partial relaxation between stimuli resulting in fluttering is ________. A. Complete Tetanus B. Incomplete Tetanus Incomplete Tetanus = fluttering
Created by: dramirez579
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