KHP 205: Muscular System PI

Smooth muscle and cardiac muscle are considered _____ muscles because we can’t control them consciously.

• Immovable
• Involuntary
• Skeletal
• none of the above

A ______ is a strong connective tissue that attaches muscle to bone.

• Tendon
• Ligament
• Cartilage

What is the length between Z-lines of an actin molecule called?

• fascicle

• sarcomere

• myosin binding site

• sarcoplasmic length

____________ attaches to actin to form the cross bridge.

• Troponin

• Tropomyosin

• Myosin

• Calcium

The muscular layer of the intestine is composed of __________ muscle.

• Smooth

• Skeletal

• Cardiac

Binding sites on actin molecules are covered by troponin and __________ when the muscle is at rest

• Actin

• Tropomyosin

• Calcium

• ATP

The thicker and darker of the two filament types in muscle cells are made of a protein called __________.

• Myosin

• Actin

• Troponin

• Tropomyosin

The neurotransmitter released at the neuromuscular junction is called __________.

• Calcium

• Insulin

• Epinephrine

• Acetylcholine

The energy compound that allows the myosin head to detach from actin is called __________.

• ATP

• Calcium

• Troponin

• Tropomyosin

The energy-storing compound similar to ATP that is stored in muscle cells is called __________.

• Creatine phosphate

• Glucose

• Glycogen

• Fats