Muscular system Anatomy and physiology review

Front

What is the organelle that contains actin and myosin?

Back

Myofibril

Front

What is the gap between the nerve cell and sarcolemma called?

Back

Synaptic cleft

Front

Which muscle is located in the upper arm and is responsible for flexing the elbow?

Back

Biceps

Front

What provides energy for muscle contraction and relaxation?

Back

ATP (Adenosine Triphosphate)

Front

Which type of muscle is found in the heart?

Back

Cardiac muscle

Front

What is the functional unit of a muscle fiber called?

Back

Sarcomere

Front

What is the role of calcium ions in muscle contraction?

Back

Calcium ions bind to troponin, causing tropomyosin to move and expose binding sites for myosin on actin.

Front

What is the term for the muscle's ability to respond to stimuli?

Back

Excitability

Front

What type of muscle is involuntary and found in the walls of hollow organs?

Back

Smooth muscle

Front

What is the primary function of tendons?

Back

To connect muscles to bones.