Answer: The options are missing from the question.
A) Na+ is bound
B) ADP is bound
C) The pump is phosphorylated
D) The pump changes conformation
The correct answer to the question is option C
THE PUMP IS PHOSPHORYLATED
Explanation: Sodium potassium pump (Na+ K+ pump) is a mechanism that uses active transport to move sodium Na+ and potassium K+ in and out of cellular compartments (intracellular and extracellular) inorder to maintain a gradient. It is responsible for maintaning a high extracellular sodium ion concentration and a high intracellular potassium ion concentration.
Once the sodium-potassium pump hydrolyses ATP,the pump will become phosphorylated (transmission of signal throughout the cell) lowing the affinity of the pump to sodium,this causes 3 sodium ions to move out of the intracellular compartment into the the extracellular compartment. The pump further brings two potassium ions together causing a dephosphorylation(inhibition of signal transmission throughout the cell) and then moves the 2 potassium ions out of the cell. This mechanism continues till there is a higher extracellular sodium concentration and a high intracellular potassium concentration therefore achieving the desired gradient(optimum)
The first answer is D. The second answer is A.
The answer would be A. 4.2mL.
You can get the average of the measurements by adding up the measurements and dividing it by the number of measurements.
So in this case, you average will be computed as follows:
= <span><u>3.1mL+2.7mL+4.6mL+1.9mL+8.7mL</u> ------> (Add up the measurements)
5 </span>------><span> (There are 5 measurements)
</span>= <u>21mL </u><span>
5
= 4.2mL
</span>
Answer:
Esophagus
Explanation:
Esophagus: The esophagus is a muscular tube that connects the pharynx (throat) to the stomach. The esophagus contracts as it moves food into the stomach.
Answer:
1.5 million years ago
Explanation:
Fire was first controlled by humans anywhere from about 230,000 years ago to 1.4 or 1.5 million years ago, depending on which evidence you accept as definitive. Evidence for the use of fire by Homo Erectus beginning some 400,000 years ago has wide scholarly support.
