A&P Quiz 6B

A mitochondria's role in muscle contraction is the...

• Synthesis of ATP

• Metabolism of ATP

• Synthesis of Proteins

• Metabolism of Worn out Proteins

Tags

NGSS.HS-LS1-7

Muscle tone is due to

• the contraction of muscle fibers in a whole muscle
• a small number of muscle units activated
• sustained muscle contraction
• all of these

Muscle fatigue can be caused by

• increased ADP
• insufficient oxygen
• depletion of creatin phosphate
• All of these

Tags

NGSS.HS-LS2-3

A sustained contraction of muscle is called

• tetanus
• summation
• latent period
• twitch

A contraction where the tension of the muscle increases, but the shortening is minimal is called a(n) __________ contraction.

• isotonic
• isometric
• isolated
• idiotic

Whole muscle contraction is

• sometimes a partial response
• is an all or nothing response
• is a steady increase in response
• is a steady decrease in response

A single contraction of intact muscle is

• wave summation
• resistence
• tetanus
• twitch

Which of the following substances are absolutely necessary for muscle contraction?

• Potassium
• ATP and calcium
• ATP and sodium
• ADP and phosphate

Muscles in the eye contain motor units with a motor neuron connected to only five muscle fibers. What type of control does a person have over these muscles?

• Very little control

• No control

• Extremely accurate control

• Moderate or average control

A muscle contraction that has a change in the length thus movement is a:

• Isometric

• Isotonic

• Osmotic

• Isomotic