There are two main types of transport systems which are used to transport solutes across a cell membrane: passive transport and active transport. Passive transport is where a protein in the membrane simply provides a 'hole' in the membrane, which allows the solute to flow freely in both directions. In this case, the flow of the solute is determined entirely by the concentration gradient across the membrane, and no energy is input to aid the movement (hence the term passive). Active transport is where the protein in the membrane actually binds to the solute, and conformational changes in the protein shape literally carry the solute across the membrane, then release it on the other side. This mechanism is designed for situations where movement of solutes against their concentration gradient is required, and requires the input of energy. This energy can come from one of a few places: * Primary active transport involves deriving the energy required to move the solute from the hydrolysis of ATP (Adenosine Triphosphate). In this case, the protein acting as the carrier is referred to as an ATPAse. * Secondary active transport involves deriving the energy from the movement of another solute across the membrane. This second solute will be flowing in the direction of its concentration gradient, so energy is released as it crosses the membrane. This allows it to drive the conformational changes in the protein that carry the solute across.
well there wasnt that many. there was riding horses,riding in a car but if you are talking about way way back then then people didnt have cars.and some people traveled by a train.
i think there was the camel and donkeys also. the horse driven cart.
There are many different types of transportation. These include trains, planes and autos. We can also include bicycles, motorcycles and even skate boards.
Basically, there's only one type: the shifting in allele frequencies in populations over the generations, driven by reproductive variation, differential reproductive success, and various molecular mechanisms in genetics. There are however numerous distinct phenomena associated with this mechanism, and different patterns to the way it affects populations, depending on circumstances. If one looks at the different 'modes' of speciation, for instance, even though they all follow from the same basic mechanisms, there are allopatric speciation, peripatric speciation, parapatric speciation, and sympatric speciation, each achieving the same thing through the same mechanisms but via slightly different paths.
diffusion, facilitated diffusion, and osmosis
there are 3 different types of plastids
I can only tell you about chemical buffers. Chemical buffer are weak acids or bases found in cells. Their purpose is to buffer cells from the effects of rapid changes in pH level. Source: Biology (textbook)
Yes, there are over 30 different types of staph infections.
two types I am aware of are rack and pinion and gearbox.
hehe busses and cars hehe
A: is a cellulsarB: fermentationdo not take my oplinon
No they're both passive transport
there are many different types of mechanisms that can make thing cross cell membranes two of these are by diffusing and active transport.
The different types of cargo hitch mechanisms are described as class 1 through class 5. Class 1 hitches are the smallest and support the smallest towing capacity, while class 5 hitch mechanisms use heavy duty mounting to distrubute the load weight more evenly
Ice cubes
transportaion
Hourses
yo face
They have different mechanisms but some of them are almost similar. The main difference among antibiotics is that everyone is developed to fight different types of bacteria, aiming different organs as well.
criticism and feedback are the two types of mechanism