Muscle Structure - Unit 2 Standard A

What are the three types of muscle tissue in the body:

• Skeletal, cardiac, and smooth muscle

• Tendons, Ligaments, Smooth Muscles

• Endomysium, perimysium, epimysium

• Myofilaments, troponin, tropomysium

What type of muscle cell is shown:

• Cardiac Muscle Cell

• Skeletal Muscle Cell

• Smooth Muscle Cell

• This is not a muscle cell, a tendon is visualized

What type of muscle cell is shown:

• Cardiac Muscle Cell

• Skeletal Muscle Cell

• Smooth Muscle Cell

• This is not a muscle cell, a tendon is visualized

What type of muscle cell is shown:

• Cardiac Muscle Cell

• Skeletal Muscle Cell

• Smooth Muscle Cell

• This is not a muscle cell, a tendon is visualized

The connective tissue coverings of a skeletal muscle, listed from superficial to deep, are:

• endomysium, perimysium, and epimysium

• endomysium, epimysium, and perimysium

• epimysium, endomysium, and perimysium

• epimysium, perimysium, and endomysium

The contraction of a muscle exerts a pull on a bone because

• muscles are attached to bones by ligaments

• muscles are directly attached to bone

• muscles that are attached to bones by tendons

• All of the above are correct

What do the epimysium and perimysium contain?

• Blood Vessels and Nerves

• Muscle Fibers and Blood Vessels

• Muscle Fibers and Nerves

• Only Muscle Fibers

True or False:

Each muscle cell/muscle fiber is composed of a singular myofibril.

• True

• False

Smooth Muscle tissues are

• small, have one centrally located nucleus and short, broad T-tubules

• filled with smaller sarcomeres

• non-striated, involuntary muscle tissue

• innervated by more than one motor neuron

Troponin is a molecule with three globular subunits. What are they for?

• Calcium ions only

• Two calcium ions, actin

• Two calcium ions, tropomyosin

• Tropomyosin, actin, and calcium ions