The selective permeability of a membrane refers to ____
a. the movement of a molecule from an area of greater concentration to an area of lesser
concentration.
b. the ability of a substance to pass through a membrane
c. the ability of only certain molecules to pass across a membrane
d. the need for carrier proteins to transport some molecules
e. the ability of molecules to be transported across the membrane only certain times of the
day
C
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In which order does blood from the veins flow through the mammalian heart?
a. left atrium, right ventricle, right atrium, left ventricle b. left atrium, left ventricle, right atrium, right ventricle c. right atrium, right ventricle, left atrium, left ventricle d. right atrium, right ventricle, left ventricle, left atrium
An example of a micronutrient is phosphorus
____________________ Indicate whether the statement is true or false.
The two basic classes of cells are:
A) human and bacteria B) bacteria and eukaryotes C) unicellular and multicellular D) prokaryotes and eukaryotes E) plant and animal
Which of the following nutrients would yield the most energy per gram?
A) Minerals B) Proteins C) Vitamins D) Carbohydrates E) Lipids