Gross Anatomy
Microscopic Anatomy
Actions of Muscles
Major Muscles
Muscle Energy
Other Major Muscles
100
Cells that are composed of myofibrils and contract when stimulated
What are muscle fibers?
100
These are the elongated threads found in striated muscle cells.
What are myofibrils?
100
The action of bending a limb or joint.
What is Flexion?
100
Kissing muscles
What is orbicularis oris?
100
A neurotransmitter found in the vesicles of the presynaptic terminal.
What is Acetylcholine?
100
Also known as the calf muscle
What is the Gastrocnemius muscle?
200
A tough cord or band of dense white fibrous connective tissue that connects muscle to bone.
What are tendons?
200
This protein, along with actin myofilaments, make up of structures called sarcomeres.
What is myosin?
200
The action of straightening a limb or joint.
What is Extension?
200
"Six-pack" muscle
What is rectus abdominus?
200
Muscle contraction occurs when these filaments slide over one another in a series of repetitive events.
What is Myosin and Actin?
200
What is the sternocleidomastoid muscle?
300
A connective tissue that wraps around a bundle of muscle fibers
What is perimysium?
300
The fundamental units of muscle that is responsible for contraction
What is sarcomere?
300
The movement of a limb or other part toward the midline of the body.
What is adduction?
300
Frowning muscle which leads to sagging neck skin at old age
What is platysma?
300
In a relaxed muscle, these proteins block the attachment site for the myosin crossbridge, thus preventing contraction.
What is Troponin and Tropomyosin?
300
Also known as the swimmer's muscle
What is the Latissimus Dorsi?
400
A dense, irregular connective tissue sheath that wraps around the entire muscle, also called fascia.
What is the epimysium?
400
A bundle of muscle fibers
What is a fascicle?
400
The movement of a limb or other part away from the midline of the body.
What is Abduction?
400
Whistling muscle
What is the buccinator?
400
An enzyme that breaks down acetylcholine into acetic acid and choline.
What is Acetylcholinesterase?
400
A group of muscles located in the front of the thigh, containing four muscles:
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What are the quadriceps?
500
The point at which a muscle's tendon attaches to a more stationary bone.
What is origin?
500
This protein works with troponin, regulating the interaction of actin and myosin in muscular contraction.
What is Tropomyosin?
500
This term is used for the movement when we point our toes, or stand on our tip-toes.
What is Plantar Flexation?
500
Bulging muscle when flexing forearm
What is biceps brachii?
500
The energy currency of life.
What is ATP?
500
A thick, fan-shaped muscle, situated at the chest (anterior) of the human body:
What is the Pectoralis major?
600
The point at which a muscle's tendon attaches to a more movable bone.
What is the insertion?
600
A system of membrane-bound tubules in the sarcolema that surrounds muscle fibrils, releasing calcium ions during contraction and storing them during relaxation.
What is a Sarcoplasmic Reticulum?
600
When rotating our forearms or feet, this term is used to describe our palms upward and soles facing outward.
What is Supination?
600
Shoulder-shrugging muscle
What is trapezius?
600
A waste byproduct that is generated from anaerobic respiration.
What is lactic acid?
600
This muscle is located on the outer aspect of the shoulder and is recognized by its triangular shape and common site for IM injections:
What is the Deltoid?