Lab Practical #3 Flashcards
Characteristics of skeletal muscle?
Striated, voluntary, multinucleated. Looks like the rods
Characteristics of cardiac muscle?
Striated, involuntary, branches, 1 nucleus. Looks like ham or has gaps
Characteristics of smooth muscle?
Unstriated, involuntary, 1 nucleus. Spindly and more wavy than cardiac
Functions of muscles?
Movement, stability, control of body openings and passageways, heat production, glycemic control
Muscle shapes?
Fusiform, parallel, triangular, unipennate, bipennate, multipennate, and circular
What is the origin?
Point of attachment for a muscle that doesn’t move
What is the insertion?
Point of attachment for a muscle that moves
What is an action?
Movement produced by contraction of a particular muscle
Where is the digastric muscle?
Below the chin, off center. Straight, and angles off toward the ear
Where is the stylohyoid muscle?
Diagonal and thin, from ear to hyoid bone
Where is the mylohyoid muscle?
Kind of triangular and thick from chin to mid-jaw, extending to hyoid. Inferior to digastric muscle
Go locate the digastric muscle
Done
Go locate the stylohyoid muscle
Done
Go locate the mylohyoid muscle
Done
Go locate the sternohyoid muscle
Done
Where is the sternohyoid muscle?
Long, extending from hyoid bone down the neck. Looks like a ray
Go locate the sternocleidomastoid muscles
Done
Where is the sternocleidomastoid muscle?
Side of the neck, from temporal bones/mastoid process to the sternum. Rectangular
Locate the temporalis muscle
Done
Where is the temporalis muscle?
Over temporal bones
Locate the occipitalis muscle
Done
Where is the occipitalis muscle?
Back of head
Locate the masseter muscle
Done
Where is the masseter muscle?
Back of the jaw