1
thin layer of connective tissue that surrounds each muscle fiber (cell).
2
he plasma membrane of a muscle fiber. It is invaginated in places to form transverse tubules and contains numerous nuclei.
3
is a thick layer of connective tissue that groups the muscle fibers into fascicles. It can be seen in a cross-section of a muscle as the marbling in a steak.
4
s the cytoplasm of the cell and contains large amounts of glycogen and myoglobin. Glycogen provides energy during muscle contraction while myoglobin contains stored oxygen.
5
are thread-like organelles 1-3 µm in diameter that extend the length of the muscle fiber.
6
is a sheet of thick connective tissue that surrounds the entirety of a skeletal muscle. It may continue at the end of the muscle belly as the tendon and thus become continuous with the periosteum of bone.
7
is found attached to the skeleton, either directly via tendons, or indirectly through a connective tissue sheet called an aponeurosis.
8
is found in the walls of the heart. It is specialized in that it has the ability to contract without external stimulation. Nerves that stimulate cardiac muscle are autonomic, meaning the control is involuntary
9
Each muscle fiber cell contains multiple, flattened ______ which lie beneath the sarcolemma.
10
is found in the walls of internal organs, such as organs of the digestive system, walls of blood vessels, and the intrinsic muscles of the eye. Smooth muscle, like cardiac muscle, is able to contract without external stimulation, and is modified by the autonomic nervous system and hormonal stimulation.
Crear