O type blood contains both A and B antibodies.
The best question for this experiment is How does the composition of the soil affect the pH of the rainwater?.
<h3>What are the best factors being studied?</h3>
The main factors based on the description are:
- The pH of the rainwater: This is the factor manipulated by the researcher.
- The aluminum concentration: This is the factor researchers are evaluating.
<h3>What is the best question?</h3>
The best question would be one that relates the main two factors. Based on this, the best question would be: "How does the composition of the soil affect the pH of the rainwater?".
Learn more about rainwater in: brainly.com/question/14295571
Answer:
i think its eather A or D
Explanation:
(its most likely A)
There are choices for this question:
<span>A. sharply hyperpolarizes
B. sharply repolarizes
C. sharply depolarizes
D. plateaus
E. has no reponse
</span>
The answer is "sharply depolarizes". When there is an opening of sodium channels, there will be an influx of sodium from the extracellular fluid into the cell (sodium are always bound to go inside the cell and this is regulated by the sodium-potassium pump). Sodium ions are cations and carries a positive charge, and when cations go inside the cell, depolarization occur (also when anions or negatively charged ions leave the cell, making the cell membrane more positive).
Hyperpolarization occurs when anions go inside the cell (for instance, influx of chloride ions) or when cations leave the cell (for instance, efflux of potassium ions).
Attached is a figure representing the ventricular action potential.