Cell Biology: Transport, Division, and Functions

Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy. Passive transport includes diffusion, osmosis, and facilitated diffusion.

Passive transport is the movement of molecules across a cell membrane from a region of higher concentration to a region of lower concentration, without requiring energy. Active transport includes primary active transport, secondary active transport, and vesicular transport.

The 4 functions of cell division are repair of injured body parts, replacement of aging cells and cells that die from disease, assisting in the organism's growth, and reproduction through asexual reproduction.

<p>Structures such as the centrioles, which aid in cell division, help the cell to reproduce.</p> Signup and view all the answers

<p>During the Interphase stage, the cell grows, produces organelles needed by both daughter cells, makes a copy of the DNA through replication, and prepares for division by producing a pair of centrioles in animal cells.</p> Signup and view all the answers

<p>During Mitosis - Prophase, DNA condenses to form separate chromosomes, with two chromatids making up each chromosome as exact copies of each other. The nuclear membrane also breaks apart during this stage.</p> Signup and view all the answers

<p>During Mitosis - Metaphase, chromosomes line up along the center of the cell, with the chromatids positioned side by side.</p> Signup and view all the answers

<p>During Mitosis - Anaphase, fibers of the centrioles pull the chromatids apart into each side of the cell.</p> Signup and view all the answers

<p>During Mitosis - Telophase, the chromatids are positioned at opposite ends of the cell, and the nuclear membrane reforms around the DNA, resulting in the creation of two new nuclei.</p> Signup and view all the answers

<p>Cell division is essential for the growth of an organism as it allows for the production of new cells, increasing the overall size and complexity of the organism.</p> Signup and view all the answers