Impacts of humans on ecosystems

How has scientific research contributed to changing public perceptions of smoking, and what role do scientists play in informing the public about the health risks?

How can pneumocytes, capillary endothelium cells, and blood cells be identified in light micrographs and electron micrographs of lung tissue?

How do dissociation curves for hemoglobin and myoglobin differ, and what can these differences tell us about oxygen storage and release in tissues?

What are the causes and treatments of emphysema, and how does this disease affect gas exchange in the lungs?

Why is it important for the pH of blood to stay within the narrow range of 7.35 to 7.45, and how is this regulated?

What are the consequences of high altitude on gas exchange, and how does the body adapt to reduced oxygen levels?