Question

Compare and Contrast (how are they the same and how are they different) Primary/Direct with Secondary/Indirect Active Transport and simple diffusion with facilitated diffusion. Explain which specific molecules would use each type of transport and what the concentration gradient would be.

Answer 1

Simple. Diffusion Facilitated Diffusion ③ simple diffusion is an ... 0 Facilitated Diffusion is the un assisted type of diffusion transport of substances in which across a biological membrane a particle moves from higher to lower conc. through a concentration gradient by means of a carrier molecule. @ Simple Diffusion occurs @ 94 occurs through trans membro through the phospholipid protein. bilayer. - It transports small, non- 1 st transports large or polas partieles polar pasticles - gt occure directly ② st occurs through specific through cell membrane. I facilitated molecules called trans membrane integral the hate in directe polsce ptus. to the concentration Gradient 16 The rate of facilitated across cell membrane as diffusion depends on the well as membrane permeability | Kinetics of carries mediated of the solute molecule. transport. 6. The rate is low at low solute 6 The rate is high at low concentrations. I solute concentration compared to simple diffusion. ① Example - Diffusion of molecules 6 Example counter transport from blood to cells through I of ci-l Hoog in renal intestinal fluid Lo s tubular cells.

Primary Active us Secondary Active Transport Transportet. remary Active transport 10 secondary Active treansport is the transport of molecules is the transport of two different against a concentration I molecules across a transport gradient by the use of membrane using energy in energy from ATP ... other forms than ATP. 6 A single molecule is transported. @ Two types of molecules are transported at once. © Uses energy from ATP. ☺ concentration gradient of the driving ion provides the energy for the transport of driven ion/molecule against its corientration gradilnt. : 6 Tons like sodium, potassium. 14 Ions serve as driving molecule and calcium are transported T while ions or other molecules ? across the cell membrane. serve as driven molecules. 6 Transmembrane proteins o symports and antiparts are are unique to the in transported through them. I proteins. nem. the two types of transmembrane sodium - potassium pump, Glucose - Sodium Pump, ". calcium pump in the muscle Maticaat exchanges and and proton pump in stomach 1 Sodium / phosphate to transporter are the examples are the example

Similarities Between Primary and secondary Active Transport • Both treansport are two active transport method. • Both methods are involved in the pumping of molecules against the concentration gradient, from low concentration to high concentration. • Transmembrane proteins are involved in facilitating both type of active transport. • Transmembrane proteins are specific to the molecules transported across the membrane. • The main purpose of both treans portation methods is to speed up the movement of molecules across the cell membrane Similarities Between Simple Diffusion and facilitated Diffusion.. Both simple and facilitated diffusion occur down the concentration gradient from a high concentration to a low concentration molecule. Both types donot require energy for transportation of molecule The Net movement of molecule on either side of the cell membrane in nero at the equilibrated state