★ Nervous / Sensory System Quiz
The optic nerve has a covering that helps protect and insulate it called the
A. muscle fiber
B. fat layer
C. myelin sheath
D. trash bag
Select your answer:

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Regulation of Urine Formation › ViewWhen ADH is secreted, urine will:
A. Be more dilute
B. Be more concentrated
C. Have a larger volume
D. All of the above
Integumentary System › View
The skin protects the body from…
A. UV Rays
B. Bacteria
C. Abrasions
D. All of these