Compounds are formed when
a. atoms of an element lose an electron.
b. atoms of an element gain an electron.
c. atoms of the same element join together.
d. atoms of two different elements join together.
Ans: d. atoms of two different elements join together.
You might also like to view...
During neuronal signaling, a change in membrane potential will cause sodium channels to open and let Na+ ions diffuse down their concentration gradient into the cell. Which of the following helps establish the concentration gradient necessary for this process to occur?
A. Na+/K+ channel B. voltage-gated Na+ channel C. Na+ symporter D. Na+/K+ pump
The white portion of your eye is called the:
A. retina. B. cornea. C. sclera. D. pupil.
The brain perceives the pitch of a sound based on the
a. region of the cochlea sending the signal. b. number of action potentials sent by the neurons. c. speed of the action potentials sent by the neurons. d. size of the action potentials sent by the neurons. e. tension produced along the cochlear membrane.
The movement of molecules across a membrane from an area of higher concentration to an area of lower concentration with the use of a carrier molecule embedded in the membrane is called ________.
A. passive diffusion B. osmosis C. facilitated diffusion D. active transport