Cellular Transport

glenda muraira y cynthia molina

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Cellular Transport by Mind Map: Cellular Transport

1. Everything that enters or leaves a cell has to pass through a cell membrane.

2. One by one

2.1. Active: spends energy and goes against gradients of concentration.

2.2. Passive: does not waste energy and goes in favor of concentration gradient.

2.2.1. Simple diffusion: the molecules cross the lipid bilayer, gasses such as carbon dioxide (CO2) and oxygen (O2).

2.2.2. Facilitated diffusion: the passage of molecules depends on the presence of the integral membrane proteins that allow this passage. Channel proteins: are classified according to the stimulus necessary for them to open. Voltage - dependent channels: are open by the change in the potential of the membrane. Ligand - dependent: the key that opens them is a specific molecule. Movement dependent: mechanical stimulus stimulates the opening.

2.2.3. Ultrafiltration: water and some solutes pass through a membrane as a result of hydrostatic pressure.

3. By mass

3.1. Endocytosis: incorporation of material into the cell.

3.1.1. Pinocytosis:

3.1.2. Phagocytosis: eating of the cell because thought it the cell incorporates large quantities of materials.

3.1.3. Receiver - mediated: are receptors to which specific molecules bind.

3.2. Exocytosis:

3.2.1. Regulated:

3.2.2. Constitutive: the secretion is constant for example saliva.