Muscular System Physiology

What would skeletal muscles use for fuel during aerobic respiration? 

• glucose
• fat
• creatine phosphate
• glycogen

During short bursts of intense exercise, muscles will use which of the following for fuel? 

• glucose
• fat
• creatine phosphate
• glycogen

Anaerobic respiration

• causes fatigue
• produces lactic acid
• produces oxygen debt
• all of these

Which of the following MUST be present for aerobic respiration? 

• carbon dioxide
• lactic acid 
• glucose
• oxygen

Acetylcholine

• is responsible for producing lactic acid
• causes an action potential to begin in muscle fibers
• gives us good muscle tone
• causes cramps and spasms

Which chemicals must be present for muscles to contract?

• calcium
• ATP
• lactic acid
• ATP and Calcuim

The part of a skeletal muscle from z-line to z-line is called

• nucleus
• H-zone
• perimysium
• sarcomere

Where do actin and myosin overlap? 

• A-band
• I-band
• Z-line
• sarcomere

Which structure contains large amounts of calcium used for muscle? 

• sarcomere
• mitochondria
• sarcoplasmic reticulum
• myofibril

A person who exhibits very large muscles has the condition of 

• atrophy
• hypertrophy
• muscular dysterophy
• muscle