Answer:
- hyperpolarization
- depolarization
- hyperpolarization
- depolarization
- hyperpolarization
- depolarization
- depolarization
Explanation:
The resting membrane potential is balanced by ion leakage and ion pumping, to get an electrical signal started the membrane potential has to lose its balance. This starts with a membrane channel opening for Na+ since Na+ concentration is higher outside the cell, ions will rush into the cell. This will change the relative voltage inside the cell. The resting potential has a voltage of -70 mV, the sodium cation entering the cell cause it to become less negative. <em>This is known as depolarization.</em>
The concentration gradient for Na+ will continue to enter the cell making the voltage to become positive reaching +30 mV. At the same time, this happens, other voltage-gated channels are also opening, a concentration gradient acts on K+, as well, as it leaves the cell, it takes a positive charge with it making the membrane potential to move back to its resting voltage of -70 mV. <em>This is called repolarization. </em>
For potassium ions to reach equilibrium the membrane voltage needs to be below -70 mV, this leads to a period of <em>hyperpolarization</em> that occurs while the K+ channels are open.
I annexed an image that illustrates this action potential process.
<em>Considering the information given during depolarization there's an increase in the number of sodium leak channels (7) making the inside of the cell more positive (2) increase in the membrane potential (4), this also implies a decrease in the extracellular concentration of potassium (6)</em>
<em>Meanwhile, during hyperpolarization an increase in the extracellular concentration of potassium (3) decreases the membrane potential (1) making the inside of the cell more negative (5).</em>
I hope you find this information useful and interesting! Good luck!<em>
</em>
If iodine solution reacts with starch, it will change color
into black.
If iodine solution is put on the fruit, according to the coloration, it can be concluded if there is starch in the fruit or not. If the yellow-orange iodine solution stayed the
same color when it was put on the fruit, it can be concluded that there is
no starch in the apple. On the other case, the black color of the fruit suggests that there is a great amount of starch in the potato. What is actually detected is alpha-amylase.
<span>Alpha-amylase breaks down starch into di- and
trisaccharide. If iodine solution reacts with starch, it will change color
into black. But, a presence of clear halos in the medium
indicates a presence of alpha-amylase because it will break down starch.</span>
Explanation:
It's considered a natural resource because it is energy that is not man made.
It's a renewable energy because it naturally gets replaced.
b. media standards of beauty are increasingly unattainable for the average woman.
Explanation:
The media standard of beauty means beauty standards shown by actresses, models or other celebrities etc.
Our society now a days expect a woman to be beautiful and perfect as the actresses or models.
A continuous craving to be considered as beautiful has forced an average woman to adopt ways of losing weight and maintain a slim or skinny figure.
But this desire has lead them to certain serious mental disorder in which they either lose the desire to eat (anorexia nervosa) or slip into depression after eating and switch to unhealthy practices of losing weight (bulimia nervosa).
Thus we can term that our culture and physiology collides with each other and takes a form of serious disorders like these.
The correct answer for the question that is being presented above is this one: "d. amount of plankton." The key abiotic factor in marin ecosystems includes the water temperature, the amount of sunlight and the water depth. The amount of plankton is not really an issue.