Anatomy Muscular System Flashcards

Terms Definitions
Adductors
pectoralis
subscapularis
Elbow joint extensors
Triceps
brachioradialis
humerus/distal radius/flexes elbow
Elbow joint Flexors
biceps brachii
Branchialis
sternocleidomastoid
sternum and clavicle/temporal bone(mastoid process)/flexes neck;rotates head
adductor muscle
pelvis/proximal femur/adducts thigh
MULTIPENNATE  MUSCLES
DELTOID
NUMEROUS INTERCONNECTING QUIL-LIKE  FASCICLES CONVERGE ON A COMMON POINT OF ATTACHMENT
ligament
attaches bone to bone (ACL)
Are skeletal muscles muscles controlled my voluntary or involuntary movements.
Voluntary
Permysium
Thick connective tissue sheath separating fascicles
sartorius
illium/proximal tibia/flexes thigh on hip
SURROUND GROUP OF SKELETAL MUSCLE FIBERS
PERIMYSIUM
lacunae  
small spaces between lamellae,  and contains osteocytes
connected with each other with haversian canals
    by means of delicate canaliculi, which allow passage of nutrient             substances from the blood stream to the osteocytes 
Are striations present in cardiac muscles?
yes
synergism
muscle that oppose undersired action of agonist eg the elbow flexion.
Acting on hip joint
Extensors
Hamstring
-Bicep femoris
-Semitendinosus
-semimembranosus
Pulled Hamstrings
Strained hamstring muscles. Often coupled with a hematoma.
extensor digitorum
distal humerus/distal phalanges of second to fifth fingers/extends fingers and wrist
rectus femorus
pelvis/tibial tuberosity via patellar ligament/extends knee and flexes hip on thigh
Smooth Muscle
Lines Hollow Structures, Nonstriated, Involuntary, Limited Ability to Regenerate
NAME THE TOUGH CONNECTIVE TISSUE CORD THAT SERVES TO ATTACH A MUSCLE TO BONE
TENDON
what enters the diaphysis through volkmanns canals?
periosteal arteries
Example of flexor
biceps brachii flexes the elbow
Actions of muscles
Prime mover (Agonist), Synergist, Antagonist, Fixator
orbicullaris oris
mandible and maxilla/skin and muscle around mouth/closes and protrudes lips
Myoglobin provides ________ with ________
Fiber with Oxygen
Muscle Hypertrophy
The stimulation of muscle protein synthesis and the increase of diameter
Glycolysis
The process of breaking down glucose; occurs in the sarcoplasm
Muscle cells need a *constant* supply of ATP. T/F
True
to throw a baseball you use what muscle?
subscapularis
what nerve innervates the extensor muscles of the forarm?
the radial nerve
How many nuclei are located in smooth muscle cells
single
pectoralis major
sternum, clavicle and first to sixth ribs/proximal humerus/adducts and flexes humerus
The prime mover is another name for the....
Agonist
Fast Glycolytic Fibers
Biggest in diameter, produce strong, qucik contractions, low myoglobin, fewer mitochondria. Respire anaerobically
When ACh levels drop, so do ____ levels
Ca^2
what is the strongest form of bone found beneath periosteum of all bones?
compact bone
Dogs and cats
Pelvic limb
gluteal muscle, quadriceps femoris, gastrocnemius, hamstring gp (biceps femoris, Semimembranosus and Semitendinosus.
extensor carpi radialis longus
humerus/base of second and third metacarpals/extends wrist and abducts hand
What type of atrophy occurs when motor units no longer recieve nerve impulses?
Denervation Atrophy
Twitch Contractions
Involve one motor unit in response to a single action potential
Wave Summation
When a 2nd Stimulus occurs before the muscle relaxes, causing a 2nd contraction that is much stronger than the initial one
a synarthrosis is a what type of joint?
an immovable joint
Where are Smooth Muscles located
Lining of digestive tract, urogenital system, airway, blood vessels
When stimulated by muscle action potential, pumps release ________ from ____________
Calcium from the Sarcoplasmic Reticulum
the anatomical snuff box is composed of what muscles?
the extensor pollicis longus
the extensor pollicis brevis
abductor pollicis longus 
What is the function of Skeletal muscles
movement of limbs, trunk, neck
What does Acetylcholinesterase (AChE) do after muscle contraction is triggered?
It breaks down ACh, that way continuous stimulation won't occur
what are the different parts of the Skeletal muscle bundles?
Endomysium; CT between individual muscle fibers, Perimysium; sheath surrounding bundles of muscle fibers, Epimysium; CT around and entire muscle
A third class lever...
is the most common lever system in the human body
the triceps brachii is a flexor compartment muscle, what are the origins of the heads and what are the performing actions?
origin of long head; inferior to glenoid process
           lateral head; middle posterior humerus
             short head; proximal humerus
 
action; extends forarm 
After the ACh binds to recpetors, what happens then?
The binding makes the sarcolemma permeanble to sodium ions, and triggers muscle action potential (contraction)
After ATP binds to the ATP-binding sites...
ATPase cleaves PO from ATP, and the energy gets transferred to the myosin head
/ 53
Term:
Definition:
Definition:

Leave a Comment ({[ getComments().length ]})

Comments ({[ getComments().length ]})

{[comment.username]}

{[ comment.comment ]}

View All {[ getComments().length ]} Comments
Ask a homework question - tutors are online