Skeletal System
How many bones in the body do we have?
206
What is the biggest muscle in our body?
True or False. a muscle can only PULL on boney attachments?
TRUE
What does shoulder flexion and adduction with elbow flexion look like?
See chase for answer
What is the difference between Axial and Appendicular bones?
Axial: Skull, Vertebral column, rib cage. These bones are not associated with movement typically
Appendicular: Bones of arms, legs, pelvis. Primarily larger movements
How many muscles do we have in our body?
639!
What does the size principle state?
We start with low threshold motor units and smaller muscle fibers and as muscle fibers fatigue, we recruit more higher threshold motor units and corresponding muscle fibers.
What force does not change when using free weights?
Gravity
What are the bones of the upper body?
Scapula, clavicle, humerus, radius, ulna, carpals, metacarpals, phalanges
During the concentric phase of a leg press, linear action occurs as a result of which joints? (A. Knee Extension B. Knee flexion C. Hip Extension D. Elbow Flexion)
A + C
The "all or nothing" theory of motor unit recruitment states....
that muscle fibers are either switched on or off
What is a Class 1 Lever?
Neck Extension, Fulcrum serves as the axis of rotation
What are the bones of the lower body?
Pelvis, femur, patella, tibia, fibula, tarsals, metatarsals, phalanges
What are the four Quadriceps muscles and what do they do?
Vastus medialis, Vastus lateralis, Vastus Intermedius Rectus Femoris. They are in charge of knee extension, hip flexion, and overall knee stability.
The emphasis of negative muscle actions within Discover Strength exercise protocols is based upon:
- application of the force-length curve
- application of the force-velocity curve
application of the force-velocity curve
What is a "Moment"?
The length of a lever, distance from the fulcrum
What are the 5 functions of the Skeletal System?
1. Support
2. Protect
3. Blood Producing cells called bone marrow
4. Produce movement
5. Storage of minerals (Phosphorus and Calcium)
What four muscles comprise the rotator cuff?
Supraspinatus, Infraspinatus, Teres Minor, Subscapularis
What are the properties of type 2 muscle fibers? (4 of them)
Glycolytic, larger, higher force production, low fatigue resistance
When completing a 1RM with any free weight, what does this tell us about your overall strength for that given movement?
How much weight you can handle through the full ROM