CH. 5 The Nervous, Skeletal, and Muscular Systems Flashcards
What is the term for the chemical messengers that cross the synapse between the neuron and muscle and assist with nerve transmission?
Neurotransmitters
Which of the following protein structures is important for muscular contractions by providing a binding site?
Troponin
Human movement is accomplished through the functional integration of three systems within the human body: the nervous system, the skeletal system, and what other system?
Muscular
What are the two components of a sarcomere?
Actin and myosin
Which joints are most associated with human movement?
Synovial
What is the function of the neuromuscular junction?
The site where the nervous system and muscle fibers communicate
What best describes the all-or-nothing principle?
A motor unit will either contract maximally or not at all.
What is the correct order of segments for the spine, starting at the top?
Cervical, thoracic, and lumbar
Humans can learn new things at any stage of life, due to which process that causes the brain to reform neural pathways?
Neuroplasticity
At what age is total peak bone mass reached?
30
Which joint is the most mobile, able to move in all three directions?
Ball-and-socket
What is the correct order of fascia, starting with the most superficial?
Epimysium, perimysium, endomysium
What is the bone type of the clavicle, radius, and ulna?
Long
Which term describes the movement of bones, such as flexion and extension?
Osteokinematics
What surrounds the skeletal muscles and connects them to other surrounding muscles?
Fascia
Calcium is often associated with bone health, but why is it also important for muscular function?
It stimulates actin and myosin activity.