Anatomy Ch. 11- Axial and Appendicular Muscles
Skeletal muscles are grouped according to their primary actions into which of the following three types?
agonists synergists antagonists
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
unipennate
all muscle fibers are on one side of the tendon; extensor digitorum
Which type of muscle has widespread muscle fibers over a broad area that collect themselves onto a common attachment site?
convergent muscles
Common intramuscular injection sites include the ____ region.
deltoid
What are some terms used in naming muscles according to shape?
deltoid trapezius rhomboid
When an appendicular muscle is contracting, the less moveable muscle attachment is usually the ______ attachment.
distal
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
mutlipennate
has branches of the tendon within the muscle; deltoid
convergent
have widespread muscle fibers over a broad area that meet on a common attachment site
Which four of the following characterize the different patterns of fascicle arrangement?
parallel circular pennate convergent
Which of the following is an example of a convergent muscle?
pectoralis major
agonist
prime mover; a muscle that contracts to produce a particular movement
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
The gluteus maximus muscle gets its name from which categories for naming muscles?
muscle size
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
Parallel
often associated with cylindrical muscles with a central body tendon
antagonist
opposes the agonist; a muscle that stretches when the agonist contracts
True or false: Parallel muscles have low endurance but are very strong.
False
Match the letter with its muscle fascicle arrangement. A- B- C- D-
A- convergent B- circular C- parallel D- pennate
The orbicularis oris muscle is named for its ______.
arrangement of muscle fascicles and body location
synergist
assists agonist; a muscle that either contributes to tension close to the insertion or stabilizes the point of origin
The orbicularis oris muscle is an example of a ______ muscle.
circular
Circular
concentrically arranged fibers around an opening concentrically arranged fibers around an opening
pennate
these fascicles are arranged at an an oblique angle to the tendon
bipennate
ussually has muscle fibers on both sides of the tendon; rectus femoris