Answer:
Transport proteins play a role in both active and passive transport to move molecules across the plasma membrane
Answer:
b
Explanation:
lava is hot and needs to flow
When you smoke a cigarette, the components; e.g. nicotine and carbon monoxide enter the lungs and are absorbed into the bloodstream. They are carried by the Red Blood Cells to the blood-brain barrier, here, nicotine binds to nicotinic acetylcholine receptors (nAChRs), resulting to a cascade that results to release of dopamine (good-feeling neurotransmitter).
The carbon cycle is carbon compound are inconverted onto the environment
A virus can be inside a body without showing up
