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Questions and Answers
What is the main focus of physiology?
What is the main focus of physiology?
- The study of DNA and genetics
- The chemical composition of cells
- The normal biological function of an organism (correct)
- The diagnosis of diseases
What level of structural organization is characterized by groups of similar cells?
What level of structural organization is characterized by groups of similar cells?
- Cells
- Atoms
- Organs
- Tissues (correct)
Which statement accurately describes the chemical level of organization in the human body?
Which statement accurately describes the chemical level of organization in the human body?
- It deals only with the solid components of the body.
- It includes both atoms and molecules that undergo chemical reactions. (correct)
- It consists solely of individual cells that function independently.
- It is focused only on the interactions between tissues.
What are cells defined as in the context of physiological study?
What are cells defined as in the context of physiological study?
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Which of the following represents the correct order of structural organization from simplest to most complex?
Which of the following represents the correct order of structural organization from simplest to most complex?
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Study Notes
Definition of Physiology
- Physiology focuses on the normal biological function of living organisms.
Levels of Structural Organization in the Human Body
- Organized hierarchically from simple to complex:
- Chemicals: Atoms form molecules.
- Cells: Fundamental units that perform life functions.
- Tissues: Groups of similar cells working together.
- Organs: Structures composed of different tissues.
- Organ Systems: Groups of organs that perform related functions.
The Chemical Level
- The human body is built from atoms that combine to form molecules.
- Chemical reactions occur among atoms and molecules, which are regulated by physiological processes.
Cells
- Cells are the most basic living units capable of performing all essential life activities.
Tissues
- Tissues consist of organized groups of similar cells.
- Collaboration among cells is crucial, as individual cells cannot efficiently accomplish tasks alone.
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