Answer:
a
Explanation:
they drop leaves and almost hibernate for the winter, like some animals!
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.
Pulmonary valve and Aortic valve
During systole, the aortic and pulmonic valves open to permit ejection into the aorta and pulmonary artery.
<h3>What happen when ventricles contract ?</h3>
When the right ventricle contracts, blood is forced through the pulmonary semilunar valve into the pulmonary artery
- Then it travels to the lungs. In the lungs, the blood receives oxygen then leaves through the pulmonary veins. It returns to the heart and enters the left atrium.
- When the left ventricle contracts, it forces blood through the aortic semilunar valve and into the aorta. The aorta and its branches carries the blood to all the body's tissues.
Learn more about Ventricles here:
brainly.com/question/1569437
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Answer:
True
Explanation:
The most common cereal grains that are used is wheat, rice, oats, and corn. WHich can all be high in a protein called prolamins, including vitamin D&E, fiber, iron, and other nutrients.
The answer is B. The air molecules of warm air have high energy and therefore collide with high energy. This causes them to move away from each other with increased temperatures. This is another reason why heating air in a closed container results to high pressure with increased heating.
