Essential nutrients
A. are important in the diet but not necessary for life.
B. are the only nutrients required by the body.
C. cannot be made in sufficient quantities by the body.
D. are needed to make food taste good.
E. are manufactured by the body.
C
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If a heavy load is at one end of a lever, the distance between the fulcrum and that load is called the
A. effort arm. B. lever length. C. resistance arm.
Neurons have a very prominent nucleolus, which indicates that they are actively performing what function?
A. making ATP B. synthesizing lipids C. manufacturing ribosomes D. breaking down carbohydrates E. dividing by mitosis
Because so many Na+ ions move into a cell during an action potential and so many K+ ions move out, no further action potentials can be generated in a given membrane until the Na+, K+-ATPase pumps can restore the concentration gradient.
Answer the following statement true (T) or false (F)
The blood cells involved in specific immunity are the
A) neutrophils. B) monocytes. C) basophils. D) erythrocytes. E) lymphocytes.