Muscle Fibers

Which muscle fibre produces the lowest force when in contracts?

• Type 1
• Type 2a
• Type 2b
• Type 3

Which muscle fibres have the fewest capillaries?

• Type 1
• Type 2a
• Type 2b
• Type 8

What is the role of mitochondria in the muscle cell?

• Produce oxygen
• Produce energy from aerobic respiration
• Produce energy from anaerobic respiration
• Creates muscle contraction

Tags

NGSS.HS-LS1-7

Which muscle fibre is the largest in diameter?

• Type 1
• Type 2a
• Type 2b
• Type 16

What are the characteristics of fast twitch muscle fibres?

• explosive activities, fatigue slowly
• endurance activities, fatigue slowly
• explosive activities, fatigue quickly
• endurance activities, fatigue quickly

A motor unit is made up of _______________.

• all the muscle fibers within a given muscle
• a motor neuron and the muscle fibers it innervates
• all the neurons going into an individual section of the body
• a fascicle and a nerve

Which one of the following is a key characteristic of slow twitch muscle fibers? 

• They contain large amounts of Mitochondria
• They are fast to fatigue
• They are recruited last
• They contain low numbers of Mitochondria

Which one of the following is a key characteristic of Fast Twitch B muscle fibers? 

• They are Red in color, meaning they contain a lot of mitochondria
• They contract rapidly with great force but fatigue fast (as they use creatine phosphate pathway)
• They are recruited for long duration activities
• They contain high numbers of Mitochondria

Muscle fatigue in Type 2 sets in due to the nonavailability of 

• calcium
• ATP
• actin binding sites
• sodium

Tags

NGSS.HS-LS2-5

Another name for Type II Fibres is....

• Fast Twitch
• Slow Twitch
• Medium Twitch
• Super Twitch