Anatomy Muscular System

What connects bone to bone?

• Ligament

• Tendon

• Cartilage

This structure inside your muscle cells is called a

• myofiber

• myafilament

• sarcomere

• Z-line

Which number represents the dark band?

• 1

• 5

• 6

• 8

Which number is labeling the Z - line?

• 1

• 2

• 5

• 4

What is the sarcolemma?

• structures that conduct action potentials into the muscle cells

• specialized plasma membrane of muscle cells

• specialized calcium storage in muscle cells

• proteins that pull on each other to contract

What is a sarcomere?

• Protein that releases calcium to start contractions

• protein that blocks actin when muscles are at rest

• specialized endoplasmic reticulum of muscle cells

• Contractile unit of a muscle cell

This is a diagram of a ___________________________.

• myofilament

• fascicle

• myofibril

• myofiber

Tags

NGSS.HS-LS1-2

Letter A indicates a _____________________(contractile organelle) while letter B indicates the two different ________________________________ (actin & myosin)

• myofibril , myofilaments

• myofilament , myofibrils

• muscle fiber , sarcolemmas

• fascicle , connective tissues

When flexing your elbow, the biceps are the ________ while the triceps are the __________

• agonist ; antagonist

• antagonist ; agonist

• synergist ; fixator

• fixator ; synergist

Which type of strain is classified by the muscle being completely torn, a complete loss of function, severe pain and bruising, requires surgery, and takes 6 months to a year to heal?

• Grade I strain

• Grade II strain

• Grade III strain