Muscular System Exam

Which muscle type is found in your stomach, bladder, and intestines?

• Skeletal
• Smooth
• Cardiac
• Straight

Which type of muscle is found in your heart?

• Skeletal
• Smooth
• Cardiac
• Straight

When a muscle contracts, it _______

• gets longer
• gets shorter
• gets thinner
• grows hair

Which types of muscle tissue are voluntary?

• Cardiac
• Skeletal
• Smooth
• Cardiac and Smooth

Identify this type of muscle

• smooth
• cardiac
• skeletal

Action of the quadriceps?

• extends leg at knee
• extends thigh at hip 
• flexes leg at knee
• flexes thigh at hip

The location where a muscle fiber and neuron meet is called:

• Neuromuscular Junction
• Musculoneural Junction
• Sarcomere
• Motor Neuron

During the first phase of contraction, what leaves the neuron and binds to the muscle fiber?

• A neurotransmitter called Acetylcholine (ACh)
• Calcium ions
• Sodium ions
• An action potential

What is the smallest contractile unit of a muscle fiber?

• Sarcomere
• Sarcolemma
• Sarcoplasmic Reticulum
• Sarcoplasm

Calcium:

• causes ATP binding to actin
• increases the action potential along the sarcolemma
• binds to proteins on myosin
• triggers the binding of myosin to actin