anatomical movement
What are the two main divisions of the human skeleton?
Axial and appendicular
what are 3 types of muscle contractions?
concentric, eccentric, and isometric
what laws are used to analyze motion?
newton's laws of motion
what are two main types of injuries?
acute and chronic
what is the main role of connective tissues and joints?
enable movement
Movement occurs in what, while rotation occurs along what?
planes and axes
which contraction involves the muscle shortening?
concentric
what type of motion moves in a straight line?
linear motion
what causes an acute injury?
sudden or excessive force
what connects muscle to bone?
tendons
which plane divides the body into left and right halves?
sagittal plane
which contraction involves the muscle lengthening under tension?
eccentric
what type of motions involves rotation around an axis?
angular motion
what causes a cumulative injury?
repeated application of force overtime
what connects bone to bone?
ligaments
movement occurs in planes and around the axis... what axis is perpendicular to the sagittal plane?
frontal axis
druing the lowering phase of a bicep curl, what type of contraction is occurring and why?
eccentric contraction because the muscle is lengthening under tension
how do angle of release and initial velocity affect projectile motion?
they determine height, distance, and trajectory
how do internal and external risk factors interact to increase injury likelihood?
they combine to make the body more susceptible to injury (easier to get injuries)
how does the structure of connective tissue relate to its function in movement?
strength and elasticity provide support, stability, and controlled movement
during a jumping jack, what plane and axis are primarily involved?
frontal plane and sagittal axis
how do different muscle contractions contribute differently to movement and stability?
Concentric creates movement, eccentric controls/decelerates movement, and isometric stabilizing joints
using newton's laws, explain why a sprinter pushes harder against the ground to run faster
greater force applied backward produces greater forward acceleration (Newtons 2nd and 3rd laws)
why might cumulative injuries be harder to detect than acute injuries?
they develop overtime without a obvious cause
why is maximizing the body's ability to absorb force important in injury prevention?
it reduces stress on tissues and lowers risk of injury