Structure
The muscular system is intimately connected to this body system
What is the skeletal system?
Another name for skeletal muscle
What is striated muscle?
Multiple fascicles together form this structure
What is muscle?
This is a filament that looks like a strand of twisted beads
What is actin?
This muscle relaxes when the biceps contracts
What is the triceps muscle?
The place on stationary bone where the muscle attaches
What is the origin?
This type of muscle is involuntary and not controlled by conscious thought
What is smooth muscle?
An extension of connective tissue that surrounds the entire muscle
What is a tendon?
Tiny structures on myosin filaments that resemble the head of a golf club
What are heads?
As available oxygen runs low, your muscle cells begin to perform this function
What is lactic acid fermentation?
This muscle in the arm has two origins
What is the biceps brachii?
The diaphragm is made up of this type of muscle
What is skeletal muscle?
Tiny threadlike structures composed of two protein structures
Z discs form the edges of this structure
What is a sarcomere?
The name for the main muscle used when muscle groups work together
What is the primary mover?
The muscle's attachment location on the movable bone
What is "insertion?"
This type of muscles fibers branch and join together, allowing nerve impulses to spread quickly. The striations in this muscle are irregular.
What is cardiac muscle?
This has multiple nuclei and a large number of mitochondria
What is a muscle fiber cell?
The energy molecule needed for muscle contraction
What is ATP?
Muscles are arranged in this fashion in order to move both ways at a hinge joint
What are antagonistic pairs?
This muscle has its origin at the sternum and clavicle, and insertion at the mastoid process
This muscle is striated like skeletal muscle but is involuntary
What is cardiac muscle?
The repeated overlapping arrangement of these filaments gives muscle its striated appearance
What are myosin and actin?
Myosin filaments in a sarcomere are connected to each other at their midpoint by this protein
What is the M-disc?
Exercising increases the number of these in a cell in order to sustain strenuous activity for a longer period of time before they have to switch to fermentation.
What are mitochondria?