Muscular System Physiology

Which of the following is NOT a type of muscle tissue?

• Cartilagenous
• Skeletal
• Smooth
• Cardiac

Which of the following types of muscle tissue do NOT contain striations

• Skeletal
• Cartilagenous
• Smooth
• Cardiac

Contractile organelles within Skeletal Muscle Tissue which contains sarcomeres

• Myofibrils

• Muscle Fibers

• Fascicle

• Sarcolemma

A single contractile unit made up of thick myosin and thin actin filaments within a myofibril

• Sarcomere

• Myomere

• Sarcofibril

• Muscle Fiber

The thick filaments within a sarcomere which contain protrusions with club-shaped heads. (Pull on the thin filaments.)

• Actin
• Myosin
• Sarcosin
• Myotin

The thin filaments within a sarcomere which are pulled on by the thick filaments.

• Actin
• Myosin
• Sarcosin
• Myotin

Skeletal muscles are only able to _____ on bones

• Pull
• Push
• Stretch
• Relax

Which of the following ions binds to troponin during a muscle contraction?

• Calcium
• Phosphorus
• Iron
• Sodium

Which of the following proteins rests on the actin filaments, blocking the myosin binding sites?

• Hemoglobin
• Sarcostatin
• Myoglobin
• Tropomyosin

Which structure within a skeletal muscle cell contains calcium channels which are stimulated through electrical impulses?

• Sarcolemma
• Sarcostatin
• Sarcoplasmic Reticulum 
• Tropomyosin