Chp.2 - Basic Exercise Science - NS

Question 1

Human Movement System?

Answer 1

• combination + interrelation of NERVOUS, MUSCULAR & SKELETAL SYSTEM.

Question 2

Nervous system? (3) primary functions?

Answer 2

• billions of CELLS that form COMMUNICATION NETWORK within human body.
• SENSORY, INTEGRATIVE, MOTOR FUNCTIONS

Question 3

Sensory function of NS?

Answer 3

• ability of nervous system to SENSE CHANGES in EXTERNAL/INTERNAL environment

Question 4

Integrative function of NS?

Answer 4

• ability of NS to ANALYZE&INTERPRET sensory information to allow for proper decision making (ouch! hot!)

Question 5

Motor function of NS?

Answer 5

• NEUROMUSCULAR response to sensory information.

Question 6

Neuron? (3) types?

Answer 6

• FUNCTIONAL UNIT of NS

- SENSORY/AFFERENT, INTERNEURONS, MOTOR/EFFERENT

Question 7

Sensory vs. interneuron vs. motor?

Answer 7

• sensory: transmits nerve impulses from EFFECTOR SITES(muscles, organs…) to CNS
• interneurons: TRANSFERS NERVE IMPULSES from one neuron to the other
• motor: transmits info from CNS to effector sites.

Question 8

CNS?

Answer 8

• central nervous system: brain + spinal cord

Question 9

PNS?

Answer 9

• peripheral nervous system - CRANIAL/SPINAL nerves

Question 10

Mechanoreceptor?

Answer 10

• type of SENSORY neuron.
• senses DISTORTION in BODY TISSUES.
  (senses touch, pressure, stretching, sound waves…; monitors position of
• in muscles, tendons, ligaments, joint capsules…

Question 11

Muscle spindle?

Answer 11

• type of MECHANORECEPTOR.

- sensitive to change in LENGTH of the muscle and the RATE of that CHANGE.

Question 12

Golgi Tendon organ? Activation?

Answer 12

• type of MECHANORECEPTOR
• located where skeletal muscle fibers insert into tendons.
• sensitive to changes in MUSCULAR TENSION and RATE of TENSION CHANGE.
• activation will cause muscle to RELAX, which prevents muscle from excessive stress/possibility of injury

Question 13

Joint receptors? Responds to (3)?

Answer 13

• receptors around joint that respond to PRESSURE, ACCELERATION and DECELERATION of the joint.

Question 14

What must be linked together in order to produce movement?

Answer 14

• the NERVOUS, SKELETAL and MUSCULAR SYSTEMS.