A&P Chapter 11
Intramuscular injections are commonly used to administer medication because of which of the following characteristics?
a rich blood supply
When the triceps brachii extends the elbow, its action is considered to be that of which of the following?
agonist
Match the type of primary action to its best description.
agonist matches Choice a muscle that contracts to produce a particular movement antagonist matches Choice a muscle that stretches when the agonist contracts synergist matches Choice a muscle that either contributes to tension close to the insertion or stabilizes the point of origin
Match the type of primary action to its correct description.
agonist matches Choice prime mover antagonist matches Choice opposes the agonist synergist matches Choice Assists the agonist
Skeletal muscles are grouped according to their primary actions into which of the following three types?
agonists antagonists synergists
Which type of muscle has widespread muscle fibers over a broad area that collect themselves onto a common attachment site?
convergent muscles
Bundles of muscle fibers, termed ______, lie parallel to each other within a muscle.
fascicles
Many parallel muscles are cylindrical with an expanded central region called a ______.
gaster or body
Common intramuscular injection sites include
gluteal, deltoid, or quadriceps
Which four of the following characterize the different patterns of fascicle arrangement?
parallel pennate circular convergent
Which of the following is an example of a convergent muscle?
pectoralis major
When an appendicular muscle is contracting, the less moveable muscle attachment is usually the ______ attachment.
proximal
What are some terms used in naming muscles according to orientation of fascicles?
rectus oblique
A circular muscle is also called a(n) ______.
sphincter
Usually during axial muscle contraction, the more moveable muscle attachment, the ______ attachment is pulled toward the less moveable muscle attachment.
superior
Which category is utilized in the naming of the extensor radialis longus muscle?
muscle action
The sternocleidomastoid muscle get its name from which category for naming muscles?
muscle attachments
Which category is utilized in the naming of the deltoid muscle?
muscle shape
The gluteus maximus muscle gets its name from which categories for naming muscles?
muscle size
Which of the following is considered a circular muscle?
orbicularis oris
True or false: Parallel muscles have low endurance but are very strong.
False Parallel muscles have high endurance and are not strong.
The orbicularis oris muscle is named for its ______.
arrangement of muscle fascicles and body location
Match the pattern of fascicle arrangement with its best description. Instructions
circular matches Choice concentrically arranged fibers around an opening parallel matches Choice often associated with cylindrical muscles with a central body tendon convergent matches Choice have widespread muscle fibers over a broad area that meet on a common attachment site pennate matches Choice these fascicles are arranged at an oblique angle to the tendon
What are some terms used in naming muscles according to shape?
trapezius deltoid rhomboid
Match the type of pennate muscle with its best description. Instructions
unipennate matches Choice all muscle fibers are on one side of the tendon bipennate matches Choice usually has muscle fibers on both sides of the tendon multipennate matches Choice has branches of the tendon within the muscle
Match the type of pennate muscle with an example of the muscle.
unipennate matches Choice extensor digitorum bipennate matches Choice rectus femoris multipennate matches Choice deltoid