Bone Structure
"A cylindrical structure within compact bone containing a central canal."
What is an osteon?
"The process of breaking down bone tissue and releasing minerals into the blood."
What is resorption?
The upper rounded part of a bone that fits into a socket, commonly seen in the femur and humerus.
What is a head?
In order, the thick and thin myofilaments present within a sarcomere.
What is myosin and actin?
Three primary muscle contraction types.
What is concentric, eccentric and isometric?
"The dense, hard outer layer of bone tissue."
What is compact, or cortical, bone?
"The principle that bone grows and remodels in response to the forces placed upon it."
What is Wolff's Law?
The three types of bone markings.
What is articular projections, attachment projections, and depressions?
This line marks the boundary between two sarcomeres.
What is the Z-Line?
Form of stored energy within the body; also known as ATP.
What is adenosine triphosphate?
"These structures within spongy bone create a lightweight framework and house red bone marrow."
What are trabeculae?
"Stem cells that give rise to specialized bone cells."
What are osteoprogenitor cells?
The roughened area on a bone that serves as a site for the attachment of tendons and muscles.
What is a Tuberosity?
This region of the sarcomere contains overlapping thick and thin filaments.
What is the A-Band?
This mineral is released into the muscle cell to open the binding sites on actin.
What is calcium?
"Perpendicular perforating canals that allow blood vessels and nerves to connect between central canals."
What are Volkmann's canals?
"The body system that regulates calcium levels and bone growth through hormones like PTH and calcitonin."
What is the endocrine system?
This natural cavity in the bone structure can contain air and aid in lightening the bone’s weight.
What is a Sinus?
The connective tissue that surrounds a bundle of muscle fibers.
What is the perimysium?
The term used to represent the structure formed when actin and myosin filaments become bound.
What is cross bridge?
Another name for spongy bone.
What is trabecular, or cancellous, bone?
"The hormone released by bones that helps regulate blood sugar and fat deposition."
What is osteocalcin?
This canal-like passageway is found within bones and allows structures to pass through.
What is a Meatus?
Term for the structure formed by a motor neuron and skeletal muscle fiber.
What is a motor unit?
Main neurotransmitter released into the synaptic cleft to trigger muscle contraction.
What is acetylcholine?