In a typical atom, the positive charge of each proton is ________
a. expressed by the value of the atomic mass
b. countered by the negative charge of each neutron
c. neutralized only when the atom bonds to others to form a molecule
d. balanced by the negative charge of an equal number of electrons
d
You might also like to view...
The muscle pictured above would most likely be found where in the body?
A. attached to the skeleton B. in the heart C. in the walls of the blood vessels D. in the intestines E. in the lungs
Human herpesvirus 3 (HHV-3)
A. causes chickenpox and shingles. B. becomes latent in dorsal root ganglia that serve specific dermatomes. C. has humans as its reservoir. D. uses the respiratory epithelium as its portal of entry. E. All of the choices are correct.
Active transport is like facilitated diffusion in that both processes
A) move molecules down their concentration gradient. B) require the presence of proteins in the plasma membrane that move molecules from one side of the plasma membrane to the other. C) require the conversion of ADP to ATP. D) do not require a source of energy. E) facilitate the movement of water through the phospholipids of the plasma membrane.
How would amino acids and calcium ions from the bloodstream move across a cell membrane?
A) diffusion B) osmosis C) facilitated diffusion D) active transport