muscle test

What molecule is responsible for providing energy for muscle contraction?

• ADP

• ATP

• GTP

• Calcium

What molecule has to be present for the myosin binding sites to be open for myosin to bind?

• Phosphate

• Potassium

• Calcium

• Sodium

What two molecules form the cross-bridges involved in muscle contraction?

• myosin

• tropomyosin

• troponin

• actin

Which muscle types are Involuntary?

• skeletal

• cardiac

• smooth

• smooth and cardiac

Which types of muscle are Striated?

• smooth

• cardiac

• skeletal

• skeletal and cardiac

Which type of muscle attaches to bones?

• cardiac

• smooth

• skeletal

The contractile unit of a muscle is called the __________.

• Sarcolemma
• Sarcoplasmic reticulum
• Sarcoplasm
• Sarcomere

Muscle fibers that break down ATP quickly, so they can contract quickly.

• fast-twitch fibers
• slow-twitch fibers
• twitch
• fasciitis

What occurs when muscles are not used?

• muscular dystrophy
• botox
• atrophy
• rigor mortis

a small bundle of muscle fibers is known as?

• actin

• mysoin

• fascicle

• sarcomere