Acell needs to take up k+ ions, the concentration of na+ outside the cell is 100 ppm, and inside the cell it is 75 ppm. which type of transport will it use?
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a. particle transport
b. active transport
c. passive transport
d. phospholipid regulated transport

active transport

Explanation:

Active transport is the energy-requiring process of pumping molecules and ions across membranes "uphill" against a gradient. The active transport of small molecules orions across a cell membrane is generally carried out by transport proteins that are found in the membrane.

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]