Bone Markings
the ridge of bone along the posterior side of the scapula
What is the spine
The major chewing muscle located by the mandible
What is the masseter muscle
A single motor neuron innervating one or more muscle fibers
What is a motor unit
12 proximal, middle, distal and 2 proximal and distal bones in the hand.
What are the phalanges
the part of the humerus that articulates with the glenoid cavity
What is head of the humerous
The primary breathing muscle
What is the diaphragm muscle
The contractile unit in a muscle fiber
What is a sarcomere
The structures in a muscle fiber that carry the electrical impulse from the sarcolemma down into the muscle fiber, to the sarcoplasmic reticulum
What are the T-tubules
What is the medial malleolus
The straight muscle located in the center of the abdominal area that allows the trunk to flex.
What is the rectus abdominis muscle
myofilament that moves toward the M-line in a sarcomere during a contraction
What is the thin filament
Bundles of muscle fibers (muscle cells) in a muscle
What are fascicles.
What is condyles
The muscle located in the center of the anterior thigh that causes the leg to extend when it contracts
What is the rectus femoris muscle
During the contraction cycle:
The molecule that binds to troponin, causing it to pull tropomyosin off the actin binding sites.
What is calcium
The process during fetal development that converts membranes into bone tissue
What is intramembranous ossification
This structure has seven true ribs, three false ribs, and two floating ribs.
What is rib cage
The hole through the maxilla, below the orbit of the eye, that allows the passage of blood vessels/nerves
What is the infraorbital foramen
The large diamond-shaped muscle that attaches to the scapula, occipital bone, and the vertebrae.
What is the trapezius muscle
The result of something preventing acetylcholine (ACh) from being released into the synaptic cleft (between an axon terminal and the postsynaptic membrane of a muscle cell).
What is no muscle contraction or inhibition of a muscle contraction
The hormone that increases osteoclast activity, increases vitamin D production, and causes the kidney to not get rid of calcium into the urine
What is parathyroid hormone