Chemical factors: This is due to internal stimuli. Changes in the blood such as decrease in O2, increase in CO2 and decrease in PH cause impulse in the carotid artery which stimulates the respiratory centers in the medulla and cause breathing.
Mechanical factors: also called external stimuli. Compression of the fetal chest during delivery forces small amount of lung fluid out of the lungs. This increase in pressure in the chest draws air into the lungs.
Answer:
D. increasing the number of mitochondria
Explanation:
The mitochondria are membrane-bound cellular organelles found in the cell of an eukaryote. Mitochondrion is responsible for the production of energy since the process which releases the energy (cellular respiration) occurs in it.
In an experimental procedure whereby the amount of energy which is produced by a cell is about to be increased will involve the increase of the number of mitochondria in that cell. Since more mitochondria means more energy production.
S phase is when it replicates itself
I believe the answer would be B, provide support for a weakened joint. I don't think braces could protect you from big impacts, and I'm sure it's not just to keep your arm cool.
Answer: don't throw garbage on the plants
Explanation:Some things in the garbage can harm the environment, and it crowds up the sunlight for other plants like grass when there's too much of it.
