Muscle Quiz

Muscle type that lines the hollow organs

• smooth muscle
• cardiac muscle
• skeletal muscle

ID the muscle type

ID the muscle type

Which element is important in directly triggering contraction?

• Sodium ion
• calcium ion
• magnesium ion
• potassium ion

The binding sites for the cross‐bridges are located on the...

• actin
• myosin
• troponin
• tropomyosin

The cell membrane of a muscle fiber is called what?

• sarcomere
• myofilement
• myofibril
• sarcolemma

Thin and thick filaments are organized into functional units called what?

• Myofibril
• Myofiliments
• z-line
• sarcomeres

Which of the following sets of reactions produce the most ATP for muscle contraction?

• Glycoloysis
• Anaerobic respiration
• aerobic respiration

Tags

NGSS.HS-LS2-3

Muscle fatigue is caused by what?

• buildup of ATP and lactic acid levels
• exhaustion of energy reserves and buildup of lactic acid levels
• buildup of ATP and pyruvic acid levels
• exhaustion of energy reserves and buildup of pyruvic acid levels

Tags

NGSS.HS-LS2-3

Calcium ions will cause the troponin/tropomyosin complex to move in such a manner as to expose the actin binding sites. The calcium ions are released from the __________.

• sarcomere
• sarcoplasmic reticulum
• presynaptic vesicles of the axons
• calcium ion channels