The most common lever in the human body is the a. first class lever b. second class lever c. third class lever d. fourth class lever

Foods that fill your body with sugar and fat but little else, are said to contain

Mucous membranes.. a. cover or line external surface of body. b. line internal body surfaces that are in contact with the environment. c. produce antibodies to combat infection. d. secrete sweat, which has antibacterial enzymes.

Which of the following choices are the fat soluble vitamin? a) c b) b6 c) d d) calcium