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Bezzdna [24]
3 years ago
6

List and describe three points of evidence for the Big Bang theory

Biology
1 answer:
Serjik [45]3 years ago
3 0

Answer:

1. Microwave Background  - Very early in its history, the whole Universe was very hot. As it expanded, this heat left behind a "glow" that fills the entire Universe. The Big Bang theory not only predicts that this glow should exist, but that it should be visible as microwaves - part of the Electromagnetic Spectrum.  This is the Cosmic Microwave Background which has been accurately measured by orbiting detectors, and is very good evidence that the Big Bang theory is correct.

2. Redshift of Galaxies  - The redshift of distant galaxies means that the Universe is probably expanding. If we then go back far enough in time, everything must have been squashed together into a tiny dot. The rapid eruption from this tiny dot was the Big Bang.

3. Mixture of Elements  - As the Universe expanded and cooled down, some of the elements that we see today were created. The Big Bang theory predicts how much of each element should have been made in the early universe, and what we see in very distant galaxies and old stars is just right.

Explanation:

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What causes the respiratory center in the medulla oblongata
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This question seem to be incomplete... Here is the full question

What causes the respiratory center in the medulla oblongata of the brain to increase the rate of respirations?

Answer:

decreased amount of oxygen or increased amounts of carbon dioxide in the blood

Explanation:

The medulla  oblongata and the pons are involved in the regulation of the ventilatory pattern of respiration.

The decrease in  blood pH result  from the  decreased amount of oxygen, Hypoxemia refers to insufficient oxygen in the blood. Thus any cause that influences the rate or volume of air entering the lungs (ventilation) or any cause that influences the transfer of air from the lungs to the blood may cause hypoxemia.

In response to a decrease in blood pH, the respiratory center (in the medulla ) sends nervous impulses to the external intercostal muscles and the diaphragm, to increase the breathing rate and the volume of the lungs during inhalation.

Also, Let take a look at a situation of an individual suffering from  an anxiety attack(i.e hyperventilating). The increased ventilation rate will remove too much carbon dioxide from their body, (this implies that there is increased amounts of carbon dioxide in the blood). Without that carbon dioxide, there will be less carbonic acid in blood, so the concentration of hydrogen ions decreases and the pH of the blood rises.

In response, the respiratory chemoreceptors detect this change, and send a signal to the medulla, which signals the respiratory muscles to decrease the ventilation rate so carbon dioxide levels and pH can return to normal levels.

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