ExPhys Ch 1: Structure and Function of Exercising Muscle

What is the role of satellite cells in response to injury?

• They prevent injury.

• They aid response to injury.

• They cause injury.

• They ignore injury.

What does the plasmalemma maintain besides pH?

• Temperature

• Nutrient transport

• Blood pressure

• Oxygen levels

What gives sarcomeres their distinctive striped appearance?

• Z-disks

• Striations

• M-lines

• H-zones

Which part of the sarcomere is associated with dark stripes?

• I-band

• H-zone

• A-band

• Z-disk

Which of the following is not a feature of sarcomeres?

• Striations

• Z-disk

• N-line

• A-band

What type of filaments are myosin?

• Thin filaments

• Thick filaments

• Medium filaments

• Elastic filaments

Which filaments show up darker under a microscope?

• Actin

• Myosin

• Collagen

• Keratin

What does the A-band contain?

• Only actin filaments

• Only myosin filaments

• Both actin and myosin filaments

• No filaments

What does the H-zone contain?

• Only actin filaments

• Only myosin filaments

• Both actin and myosin filaments

• No filaments

Which filaments are involved in muscle contraction?

• Actin and myosin

• Collagen and elastin

• Keratin and fibrin

• Tubulin and dynein