Question

timed test this test has a time limit of 1 hour.this test will save and submit automatically when the time ewarmings appear when half the time, 5 minutes, 1 minute, and 30 seconds remain. multiple not allowed. this test can only be taken once. attempts force once started, this test must be completed in one sitting. do not leave the test before clicking sav completion this test does not allow backtracking. changes to the answer after submission are prohibited. your answers are saved automatically. remaining time: 47 minutes, 13 seconds. question completion status: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 moving to the next question prevents changes to this answer. question 20 this is a type of active transport that moves ion against the concentration gradient and requires atp a. osmosis b. facilitated diffusion c. sodium/potassium pump d. simple diffusion

Explanation:

Osmosis is the diffusion of water across a semi - permeable membrane, not ion transport. Facilitated diffusion and simple diffusion are passive transport and move substances along the concentration gradient without using ATP. The sodium/potassium pump is an active transport mechanism that moves ions (sodium and potassium) against their concentration gradient and requires ATP for energy.

Answer:

C. sodium/potassium pump