B4.5.1 - Co-Transport

Define ‘co-transport’:

the transport of one substance coupled with the transport of another substance across a plasma membrane in the same direction through the protein carrier

What is defined as: ‘the transport of one substance coupled with the transport of another substance across a plasma membrane in the same direction through the protein carrier’?

co-transport

What is the first step in co-transport in the ileum?

sodium ions are actively transported into the blood by sodium-potassium ATPase from epithelial cells

What is the result in co-transport in the ileum after sodium ions are actively transported into the blood by sodium-potassium ATPase from epithelial cells?

the concentration of sodium ions is lower inside than outside the cell

What is the next step in co-transport in the ileum after sodium ions are actively transported into the blood by sodium-potassium ATPase from epithelial cells?

two sodium ions bind to the sodium-glucose co-transporter

What is the next step in co-transport in the ileum after two sodium ions bind to the sodium-glucose co-transporter?

a glucose molecule binds to the sodium-glucose co-transporter

What is the next step in co-transport after a glucose molecule binds to the sodium-glucose co-transporter?

sodium and glucose diffuse into the cell

What protein is used in co-transport in the ileum?

sodium-glucose co-transporter