The answer is C.... Hope this could help
<span>The division of the fur trade was mostly the
spark of the Pequot war. The Pequot war is a conflict between the Pequot tribe and the alliances that the European
colonists have made in Massachusetts Bay, Plymouth, and Saybrook colonies and
their native tribe alliance with the Mohegan tribes. <span>
<span>It was a
dispute that the Pequots lost; where about an approximate of 700 of these
tribesmen were either killed or sent to slavery. Access to the control of fur
trade divided the two tribes when they both decided to realign with English
trade sources. The Pequots made an alliance with the Dutch, while the Mohegan
made an alliance with the English. </span></span></span>
Answer:
The voltage-gated potassium channels associated with an action potential provide an example of what type of membrane transport?
A. Simple diffusion.
B.<u> Facilitated diffusion.
</u>
C. Coupled transport.
D. Active transport.
You are studying the entry of a small molecule into red blood cells. You determine the rate of movement across the membrane under a variety of conditions and make the following observations:
i. The molecules can move across the membrane in either direction.
ii. The molecules always move down their concentration gradient.
iii. No energy source is required for the molecules to move across the membrane.
iv. As the difference in concentration across the membrane increases, the rate of transport reaches a maximum.
The mechanism used to get this molecule across the membrane is most likely:
A. simple diffusion.
<u>B. facilitated diffusion.
</u>
C. active transport.
D. There is not enough information to determine a mechanism.
Carrier proteins - exist in two conformations, altered by high affinity binding of the transported molecule. Moves material in either direction, down concentration gradient (facilitated diffusion). EXAMPLE: GluT1 erythrocyte glucose transporter.
Channel proteins - primarily for ion transport. Form an aqueous pore through the lipid bilayer. May be gated. Moves material in either direction, down concentration gradient (facilitated diffusion). EXAMPLES: Voltage-gated sodium channel, erytrhocyte bicarbonate exchange protein.
This might be helpful... because I don't know anything about facilitated diffusion.
