Muscle Contraction

What is the most basic level of the muscular structure?

• Sarcolemma

• Sarcomeres

• Fibers

• fascicles

Tags

NGSS.HS-LS1-2

Found in the heart

• smooth

• cardiac

• skeletal

• all

What does calcium attach in a muscle contraction?

• Myosin

• Tropomyosin

• Troponin

• Actin

The actin is labeled here as _______.

• AD

• AC

• BC

• AB

The myosin is labeled here as _______.

• BD

• AC

• BC

• AB

This type of contraction is often due to stress, lack of exercise, anxiety, lack of sleep, too much caffeine and too little water

• Twitch

• Tetanic

• Isometric

• Isotonic

• Isokinetic

Which of the following occur when ATP binds to the myosin head?

• Myosin head change to low energy configuration

• Myosin head undergoes power stroke

• Myosin head detach from actin

• Myosin head forms cross bridge

Ca2+ released by sarcoplasmic reticulum will bind to

• Actin

• Troponin

• Myosin

• Tropomyosin

where the terminal branches of a motor neuron and the sarcolemma of a skeletal muscle fiber "join"

• plasmodesmata

• neuromuscular junction

• gap junction

• intercalated disc

a neurotransmitter that stimulates skeletal muscle fibers

• dopamine

• serotonin

• acetylcholine

• epinephrine