Answer:
See the eplanation below, please.
Explanation:
In sickle cell anemia, hemoglobin has the form of rigid bars inside the red blood cells, causing them to adopt sickle shapes being not very flexible. These cells can block blood vessels, stopping the flow, causing oxygen to not reach the tissues.
The cause of this anemia is due to a genetic mutation (there is a substitution of thymine for adenine in the beta globin gene, located on chromosome 11), generating Hemoglobin S with a decrease in oxygen binding.
There are choices for this question namely:
<span>a. K+ leaks into cells.
b. Voltage-gated Na+ channels become inactivated.
c. Voltage-gated K+ channels become inactivated.
d. Na+ reaches equilibrium across the neural membrane and stops leaking in.
e. Voltage-gated Na+ channels close.
The correct answer is "voltage-gated Na+ channels become inactivated". In the events concerning an action potential, the first event is a stimulus that depolarize the resting membrane potential up to the threshold. When the threshold is reached there will be opening of voltage gated Na+ channels wherein sodium can enter the cell and make the membrane more positive therefore called depolarization. After depolarization, voltage gated Na+ channels become inactivated and K+ leaks out of the cell making the cell less negative hence repolarization. After which, more and more K+ ions leaks out making the membrane more negative than the resting membrane potential hence hyperpolarization. When K+ channels are inactivated, the cell membrane will eventually go back to its resting membrane potential.</span>
The answer is carbonic acid-bicarbonate buffer. This buffer system is regulated by the lungs and kidneys due to the regulation of CO2 and bicarbonate ions respectively. It is formed by the dissolving of carbon dioxide from the tissue into the blood plasma. A weak acid-base conjugate is a good buffer due to its partial dissociation in water.
Answer: A
Explanation: It is a mineral acid composed of the element sulfur, oxygen and hydrogen, with the formula H²SO⁴.
Answer:
rarwfaction is when a rare fragment off something is discovered
