Physiology is the branch of biological science that deals with the normal functions and mechanisms of living organisms and their parts. It explains how the body’s organs, tissues, and cells work together to sustain life. The term originates from Greek words physis (nature) and logos (study). Physiology bridges the gap between anatomy (structure) and biochemistry (chemical processes), helping to understand the functional aspects of the human body.
The scope of physiology is vast, encompassing multiple subfields like cell physiology, neurophysiology, cardiovascular physiology, and renal physiology, among others. Each system is studied to understand how it maintains homeostasis, the body’s ability to keep internal conditions stable despite external changes.
Physiology’s importance lies in its foundational role in medicine and health sciences. It aids in understanding disease mechanisms, developing treatments, and promoting wellness. It also forms the basis for clinical applications such as pharmacology, pathology, and diagnostics. In short, physiology provides the functional blueprint of life, helping us comprehend how our body operates under normal and altered conditions.
10 Key Points
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Physiology studies the functions of living organisms.
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It explains how body organs and systems work together.
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Derived from Greek: Physis (nature) + Logos (study).
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It connects anatomy, biochemistry, and medicine.
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Major branches include cell, systemic, and clinical physiology.
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Homeostasis is a central concept in physiology.
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Physiology explains the body’s response to stimuli.
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It provides a foundation for medical diagnosis and treatment.
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Knowledge of physiology aids in disease prevention.
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It forms the scientific basis of all health professions.
MCQs
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The term “Physiology” is derived from which language?
A) Latin
B) Greek
C) Arabic
D) French -
Physiology mainly deals with:
A) Structure of body
B) Chemical reactions
C) Functions of body parts
D) Genetic makeup -
The main goal of physiology is to study:
A) Diseases
B) Normal body functions
C) Surgical techniques
D) Drug interactions -
The concept of maintaining internal stability is called:
A) Hormonal control
B) Homeostasis
C) Metabolism
D) Coordination -
Which branch of physiology deals with brain functions?
A) Renal physiology
B) Neurophysiology
C) Cell physiology
D) Endocrine physiology -
The study of heart and blood circulation is called:
A) Cardiac physiology
B) Cardiovascular physiology
C) Circulatory pathology
D) Vascular anatomy -
Physiology forms a link between:
A) Biology and Mathematics
B) Anatomy and Biochemistry
C) Physics and Chemistry
D) Genetics and Botany -
The importance of physiology in medicine lies in:
A) Describing organ structures
B) Explaining organ functions and dysfunctions
C) Naming anatomical parts
D) Studying fossils -
Homeostasis refers to:
A) Balance of internal environment
B) Cell growth
C) Genetic evolution
D) Body movement -
Physiology is important for medical students because it:
A) Focuses on plant systems
B) Provides functional understanding of human body
C) Deals with structural classification
D) Studies extinct species
Answer Key
1–B
2–C
3–B
4–B
5–B
6–B
7–B
8–B
9–A
10–B