Muscle Anatomy
The tough connective tissue that connects skeletal muscle to bone
Tendon
Acetylcholine (Ach) triggers the release of which molecule?
Calcium (Ca2+)
What type of muscle tissue can be found in the digestive system and blood vessels?
Smooth Muscle
The ___________ is a large, broad muscle that covers the lower back. Helps to pull down objects if above head.
Latissimus Doris
False, just over 600 muscles
What is the connective tissue layer around a single muscle fiber?
Endomysium
Where is calcium stored when a muscle is at rest?
Sarcoplasmic reticulum
This muscle extends your elbow
Triceps Brachi
T/F: Muscles account for ~40% of your bodies weight
True
H zone
What is the role of ATP in a muscle contraction
Releases the myosin head from actin so it can bind again
What type of muscle can be both voluntary and involuntary?
Skeletal Muscle
Which muscle abducts your entire arm?
Deltoid
The Masseter muscle(what closes the jaw) can contract with over 200 lbs of force
True
What is the area called in which there is no myosin filaments?
What are the 2 factors that control how strong a muscle contraction is?
1. How frequent the muscle is stimulated(how quickly the myosin head binds/unbinds)
2. How many muscles fibers are being stimulated
Which type of muscle(s) is involuntary?
Smooth and cardiac muscle
Name of the of the three primary muscles from the Quadriceps group
Vastus Lateralis, Vastus Lateralis, Rectus Femoris
T/F: The body maintains muscle tone regardless of your activity level
False, lack of use leads to a decrease in tone (zero use could eventually lead to atrophy)
What is 1 unit of a myofibril called? It stretches from one z-disc to the other z-disc.
A Sarcomere
Aerobic Respiration(aerobic pathway)
Besides where it is located, what is a special characteristic that only cardiac muscle has?
Intercalated discs
Which muscle dorsiflexes the foot?
Tibialis anterior
What is the biggest muscle in the body?
Gluteus Maximus