Which of the following is NOT a guideline for PNF stretching?
A. For each muscle group, complete only 1 set to avoid overstretching.

B. Leave 48 hours between PNF stretching routines.

C. Communicate well when stretching with a partner.

D. You should hold the isometric contraction for 6-10 seconds, and the passive stretch for 10-30 seconds.

1. pass through the cochlea, are transformed into nerve impulses and sent to the brain hair cells 2. forms in your outer ear and is meant to protect your ear from dirt and infection middle ear 3. receives sounds and sends them through the auditory canal to the eardrum inner ear 4. a thin membrane that transmits sound waves into the middle ear cerumen 5. where the cochlea is sound waves 6. a snail-shaped organ lined with hair cells cochlea 7. inside, small bones transmit sound waves from the eardrum to the inner ear eardrum 8. destroyed by extended exposure to loud noise outer ear