Muscle physiology

Ca จับกับตัวใดระหว่างการหดตัวของกล้ามเนื้อ?

• Actin

• Myosin

• Troponin

• Tropomyosin

เป็น plasma membrane surrounding each muscle fiber?

• T Tubule

• Sarcolemma

• Sarcoplasm

• Nucleus

หน่วยหดตัวของกล้ามเนื้อคืออะไร?

• Z disk

• Sarcomere

• Muscle fiber

• Muscle cell

What protein makes up the thick filaments?

• Troponin

• Tropomyosin

• Myosin

• Actin

เส้นใยกล้ามเนื้อส่วนใดที่เก็บ Ca ions และปลดปล่อยออกมาเมื่อถูกกระตุ้น?

• T tubule

• Sarcolemma

• Nucleus

• Sarcoplasmic reticulum

Which of these occurs last during a muscle contraction?

• The nerve signal reaches the neuromuscular junction

• Ach is released and opens Na ion channels

• The sarcomere shortens

• The myosin binds to the actin

Which of these occurs last during a muscle contraction?

• The nerve signal reaches the neuromuscular junction

• Ach is released and opens Na ion channels

• The sarcomere shortens

• The myosin binds to the actin

During a muscle contraction, cross-bridges from between what two structures?

• Actin and myosin fibers

• neuron and muscle

• mitochondria and actin

Muscle fatigue เกิดจากอะไร

• acetylcholine

• cholinsterase

• lactic acid

• glucose

The protein that covers the binding site on actin when a muscle is relaxed is called

• Troponin

• Myosin

• Tropomyosin

• Myofibril