Potassium ions enter cardiac cells through which of the following mechanisms?
A. osmosis
B. diffusion
C. active transport
D. facilitated diffusion
2007-01-20 09:25:28 · 4 answers · asked by brian 1 in Science & Mathematics ➔ Biology
C.
Analysis: A, B, and D are all forms of PASSIVE transport, that means there is no mediation or not requiring energy to do the transport of substances. On the other hand, Potassium ions have been documented to pass through the cells using ION Channels, which require ATP or some form of energy. Because it requires energy, it is called Active Transport.
Thus, C.
2007-01-20 09:32:11 · answer #1 · answered by Aldo 5 · 0⤊ 0⤋
I would have to say active transport, because osmosis has to do with water,diffusion deals with things going from high concentration to low concentration. and I have no idea what facilitated diffusion is.
2007-01-20 19:22:23 · answer #2 · answered by Someone 2 · 0⤊ 0⤋
C because you are moving the ions against the concentration gradient.
2007-01-20 19:39:59 · answer #3 · answered by Ellie S 4 · 0⤊ 0⤋
All of the above
2007-01-20 17:33:31 · answer #4 · answered by Anonymous · 0⤊ 1⤋