Muscle Basics
Name the 3 types of muscle tissue
Skeletal, cardiac, and smooth
Which band of the sarcomere shortens during contraction
I band
What are bundles of muscle fibers called
fascicles
What is the neurotransmitter used to stimulate muscles
acetylcholine
Deltoid
O: scapula and clavicle
I: humerus
A: Abduction of humerus
This type of connective tissue connects muscles to bones
tendons
Which band of the sarcomere is identified by being the same length as a myosin chain
A band
What is the contractile unit of muscle (what to we have to zoom in to actually see how a muscle contracts)
sarcomere
This protein is the location where calcium binds to thin fibers
troponin
triceps brachii
O: humerus
I: ulna
A: extension of elbow
This type of connective tissue separates adjacent muscles
fascia
Where is a Z line located? Which band and what type of fibers does it hold together?
In the I band and holds together action fibers
This example of fascia covers the entire muscle as a whole
epimysium
This protein on thin fibers changes shape after calcium binds to the fiber
tropomyosin
zygomaticus major
O: zygomatic bone
I: mouth tissue
A: raising corners (smiling)
Correctly group these terms: actin, myosin, thick, thin, light, and dark.
Actin is thin and light. Myosin is thick and dark
The M line is in what zone? what band? and links which fibers?
H zone, A band, myosin fibers
This example of fascia covers individual muscle fibers
endomysium
Acetylcholine is released from _____ into the ________
neurons/nerves/axons into the neuromuscular junction
masseter
O: zygomatic bone
I: mandible
A: closes jaw (chewing)
What are 3 ways to make ATP
creatine phosphate, cellular respiration (glycolysis), anaerobic respiration.
When sarcomeres join back to back to form long chains these chains are called
myofibrils
This example of fascia covers the fascicles
Perimysium
sarcoplasmic reticulum into the sarcoplasm
gastrocnemius
O: femur
I: calcaneus
A: flexion of the foot