Answer:
Perfect tenses show when an action happened in relation to another action. To form the perfect tenses, use a form of the helping verb have (have, has, had, will have) plus the past participle of the main verb. The verb have changes to show the tense.
This causes your CO2 levels to decrease and your blood pH to increase.
<h3>What is hyperventilation?</h3>
Hyperventilation is rapid breathing in of oxygen and breathing out of carbondioxide.
The various causes of hyperventilation include the following:
When a person hyperventilates they exhale more carbon dioxide than normal. As a result the carbon dioxide concentration in the blood decreases.
While the corresponding drop in H3O+ concentration causes an increase in pH.
Therefore, when you start to hyperventilate before giving a presentation, this will cause your CO2 levels to decrease and your blood pH to increase.
Learn more about hyperventilation here:
brainly.com/question/13147560
1. "...the sun hides in winter, peeking out only occasionally."
2. Alaska is beautiful, and special to the author.
Answer:
The correct answer is: O John packet the following for his trip: an umbrella, a blanket, a sleepeing bag, and a tarp.
Answer:
B.
Explanation:
A and C have awkward sentence structure because "when a car needs many serious repairs, it might be cheaper to buy a new car", it repeats the word car again making it redundant and in C, "When a car had needed many serious repairs, it might be cheaper to buy a new one", it has wrong use of past-tense.
