Remember, diffusion is when molecules move from an area of HIGH concentration to an area of LOW concentration. Therefore, in this example the molecules on the outside, where the concentration is high, will diffuse to the inside of the circle, where the concentration is low.
<span>Chromosomal and genetic causes:
Muscular dystrophy, sickle cell anemia, hemophilia, cystic fibrosis
CHARGE Association (syndrome) and Usher syndrome are the two examples of genetic causes of deaf-blindness
-Teratogenic causes:
TORCH - toxoplasmosis, other, rubella, cytomegalovirus, and herpes.
-Prematurity and pregnancy complications:
Neurological conditions, cerebral palsy -(tongue and mouth cant move to articulate), vision or hearing loss, intellectual disability
-Acquired causes:
Traumatic brain injury (TBI), child abuse, environmental toxins</span><span>Topographical </span>
A neurotransmitter is a chemical substance that is released by a nerve fiber due to the presence of nerve impulses; it transport chemical information from one nerve to the other. A receptor refers to a protein molecule that is found on the cell membranes of every cell, it functions by responding in an appropriate manner to chemical signals that are coming from outside of the cell.
The relationship between the neurotransmitter and the receptor is that the neurotransmitter molecules typically bound with the appropriate receptors and bring about the expected changes in the targeted postsynaptic cell.
The answer should be the respiratory system.
When we breathe, air is taken in our body and they travels to the lungs through the trachea. The lungs is the site where the oxygen from the air we just breathed is exchanged with the carbon dioxide (waste).
In the lungs, there's something call air sac, which diffuses the oxygen to the capillaries. At the same time, carbon dioxide from the capillaries diffuses back to the air sac. Then, we breathe out and the carbon dioxide and the remaining substances in the air that we don't need is breathe out.
That explains why there's more oxygen in the unbreathed air than oxygen from breathed air, and less carbon dioxide in unbreathed air than breathed air.
And after that, the capillaries transfer these oxygenated blood to the pulmonary vein, and then transfer them back to the heart.
