Reductionism: A scientific approach that explains complex biological phenomena by breaking them down into their simplest components, such as molecules or cells, assuming that understanding these parts will reveal the whole system's behavior.
Molecular Biology: A branch of biology focusing on the molecular basis of biological activity, emphasizing the roles of DNA, RNA, proteins, and biochemical processes in living organisms.
Physico-chemical Techniques: Methods combining physical and chemical principles (e.g., spectroscopy, chromatography) used to analyze biological molecules and systems at the molecular level.
Emergent Properties: Characteristics of a system that arise from interactions among its components and cannot be predicted solely by understanding individual parts, highlighting the limitations of reductionism.
Systems Biology: An integrative approach that studies biological systems as a whole, emphasizing interactions and emergent properties rather than isolated components.
1. What is the primary role of cellular and molecular processes in living organisms?
2. What is the key structural feature of alveoli that facilitates efficient gas exchange?
3. What causes the movement of gases during respiration?
Reductionism — definition?
Explaining complex systems by their parts.
Systems Biology — approach?
Studying interactions and emergent properties of systems.
Cellular processes — focus?
Molecular mechanisms within cells.
Respiratory organs — examples?
Lungs, gills, trachea, skin.
Mechanism of breathing — process?
Muscle movements create pressure gradients for airflow.
Gas exchange — site?
Alveoli via diffusion.
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