Naming Skeletal Muscles
What does rectus mean?
Straight (direction of fibers)
What are the three types of muscle tissue?
cardiac, skeletal, smooth
What is contractile unit of muscles called?
Sarcomere
Name the thick and thin filaments responsible for muscle contraction.
actin
Explain the difference between abduction and adduction
Adduction-add to body
Abduction-away from body
How did temporalis get its name?
Location (on temporal bone)
Which of the tissues has multiple nuclei in the cells?
Skeletal
What is the special muscle endoplasmic reticulum called?
Sarcoplasmic reticulum
What actually shortens in muscle contraction?
The sarcomere
Name two ways that muscles can increase their force of contraction.(There are 3)
How did deltoid get its name?
Shape (triangular)
Which tissue lacks striations?
Smooth
Muscle fibers come together to form _____________
Fascicles
What has to get out of the way for contraction to occur?
Tropomyosin
What is an example of a first class lever in your body?
Raising head from chest
How does the triceps get its name?
Number of origins (3 heads)
Which tissue is bound by intercalated discs?
Cardiac
Fascicles come together to make the ____________ ___________
Muscle organ
What ion helps myosin gain access to the actin?
Calcium
What is an example of a second class lever in your body?
Standing on your toes
How do the flexor and extensor muscles get their names?
The action they do
Which tissue is the slowest contractor?
Smooth
What does the epimysium surround?
The entire outside of the muscle
What is a difference between the resting potential and the action potential?
Voltage, ions
What is an example of a third class lever in your body?
Bicep curl