Comprehensive Study Guide: Foundations of Anatomy & Physiology

Lecture 1: Introduction to Anatomy & Physiology

What is Anatomy and Physiology?

Anatomy is the study of the structure of living organisms, while physiology focuses on their function. These disciplines are foundational to understanding the human body.

• Anatomy includes subfields such as cytology (study of cells), histology (study of tissues), regional anatomy, systemic anatomy, and surface anatomy.

• Physiology examines how anatomical structures work together to maintain life.

• Example: Studying the heart's structure (anatomy) and how it pumps blood (physiology).

Homeostasis

Homeostasis refers to the body's ability to maintain stable internal conditions despite external changes.

• Parameters: Temperature, pH, glucose levels, etc.

• Feedback Loops: Biological (e.g., blood glucose regulation via insulin) and non-biological (e.g., thermostat in a house).

• Positive Feedback: Amplifies changes (e.g., childbirth contractions).

• Negative Feedback: Reduces changes (e.g., body temperature regulation).

Major Themes in Anatomy & Physiology

• Structure and Function: Anatomy determines physiology.

• Levels of Organization: Chemical, cellular, tissue, organ, organ system, organism.

• Metabolism: All chemical reactions in the body.

• Adaptation, Natural Selection, Evolution: How organisms change over time to survive.

• Stimulus: Any change in the environment that elicits a response.

Hierarchical Organization

• Levels: Cell → Tissue → Organ → Organ System → Organism

Tissues and Organs

• 4 Major Tissue Types: Epithelial, Connective, Muscle, Nervous

• Organ: Structure composed of two or more tissue types performing specific functions.

• Cytology vs. Histology: Cytology studies cells; histology studies tissues.

Organ Systems

• 11 Major Organ Systems: Integumentary, Skeletal, Muscular, Nervous, Endocrine, Cardiovascular, Lymphatic, Respiratory, Digestive, Urinary, Reproductive

Lecture 2: Chemical Foundations

Atoms and Elements

Atoms are the basic units of matter, composed of protons, neutrons, and electrons.

• Atomic Number: Number of protons

• Atomic Mass: Protons + Neutrons

• Electrons: Negatively charged particles in orbitals

Subatomic Particles and Chemical Properties

• Protons: Determine element identity

• Neutrons: Affect isotope

• Electrons: Involved in chemical bonding

Types of Chemical Bonds

• Ionic Bonds: Transfer of electrons

• Covalent Bonds: Sharing of electrons

• Hydrogen Bonds: Weak attractions between polar molecules

Periodic Table Elements

• Major Elements: Carbon, Hydrogen, Oxygen, Nitrogen

• Minor Elements: Calcium, Phosphorus, Potassium, etc.

Octet and Duet Rules

• Atoms tend to fill their outer shell with 8 electrons (octet) or 2 (duet for hydrogen and helium).

Electrolytes

• Substances that dissociate into ions in water and conduct electricity.

Lecture 3: Energy and Chemical Reactions

Types of Energy

• Kinetic Energy: Energy of motion

• Potential Energy: Stored energy

Endergonic vs. Exergonic Reactions

• Endergonic: Absorb energy

• Exergonic: Release energy

Anabolism vs. Catabolism

• Anabolism: Building complex molecules

• Catabolism: Breaking down molecules

Chemical Reaction Notation

• Reactants → Products

Organic vs. Inorganic Chemistry

• Organic: Contains carbon (e.g., glucose)

• Inorganic: Does not contain carbon (e.g., water, salts)

Enzymes and Reaction Rates

• Enzymes: Biological catalysts that speed up reactions

• Factors: Temperature, pH, substrate concentration

Hydrophobic vs. Hydrophilic

• Hydrophobic: Water-repelling

• Hydrophilic: Water-attracting

pH and Buffers

• pH: Measure of hydrogen ion concentration

• Buffer: Substance that resists changes in pH

• Equation: $pH = -\log[H^+]$

Lecture 4: Macromolecules

Types of Macromolecules

• Carbohydrates: Energy source; monosaccharides, disaccharides, polysaccharides

• Lipids: Fats, oils, phospholipids, steroids

• Proteins: Made of amino acids; enzymes, structural components

• Nucleic Acids: DNA and RNA

Polymerization and Bonds

• Dehydration Synthesis: Forms polymers by removing water

• Hydrolysis: Breaks polymers by adding water

Carbohydrate Reactions

• Monosaccharides: Glucose, fructose

• Disaccharides: Sucrose, lactose

• Polysaccharides: Starch, glycogen

Lipids

• Types: Triglycerides, phospholipids, steroids

• Bonds: Nonpolar covalent bonds

Lecture 5: Cell Structure and Function

Cell Theory

• All living things are composed of cells.

• Cells are the basic unit of life.

• All cells come from pre-existing cells.

Cell Components

• Plasma Membrane: Phospholipid bilayer with embedded proteins

• Cytoplasm: Fluid inside the cell

• Organelles: Specialized structures (nucleus, mitochondria, etc.)

Membrane Proteins

• Functions: Transport, signaling, cell recognition

• Glycocalyx: Carbohydrate-rich area for cell recognition

Transport Mechanisms

• Passive Transport: Diffusion, osmosis

• Active Transport: Requires energy (e.g., sodium-potassium pump)

• Tonicity: Hypertonic, hypotonic, isotonic solutions

Lecture 6: Cell Organelles

Major Organelles and Their Functions

• Nucleus: Contains genetic material

• Mitochondria: ATP production

• Ribosomes: Protein synthesis

• Endoplasmic Reticulum (ER): Protein and lipid synthesis

• Golgi Apparatus: Modifies and packages proteins

• Peroxisomes: Break down fatty acids

• Lysosomes: Digest cellular waste

Lecture 7: Cytoskeleton and Nucleus

Cytoskeleton

• Functions: Structural support, movement, intracellular transport

• Major Fiber Types: Microfilaments, intermediate filaments, microtubules

• Examples: Cilia, flagella, cell division, microvilli, pseudopodia

Nucleus

• Control Center: Regulates cell activities

• Chromatin vs. Chromosomes: Chromatin is uncondensed DNA; chromosomes are condensed during cell division

• Sister Chromatids: Identical copies formed during DNA replication

DNA Structure and Replication

• Phosphodiester Linkages: Bonds between nucleotides

• Base Pairing: Adenine-Thymine (2 H-bonds), Cytosine-Guanine (3 H-bonds)

• Central Dogma: DNA → RNA → Protein

Lecture 8: Protein Synthesis and Cell Cycle

Protein Synthesis

• Transcription: DNA to mRNA

• Translation: mRNA to protein

• Codon vs. Anticodon: Codon is mRNA triplet; anticodon is tRNA triplet

• Initiation, Elongation, Termination: Steps in translation

Cell Cycle

• Phases: Interphase (G1, S, G2), Mitosis, Cytokinesis

• DNA Replication: Occurs in S phase

• Checkpoints: Ensure proper division

• Programmed Cell Death (Apoptosis): Controlled cell death

• Tumors: Benign (non-cancerous) vs. Malignant (cancerous)

• Metastasis: Spread of cancer cells

Summary Table: Major Tissue Types

Tissue Type	Main Function	Example
Epithelial	Protection, absorption, secretion	Skin, lining of GI tract
Connective	Support, binding, storage	Bone, blood, adipose
Muscle	Movement	Skeletal muscle, heart
Nervous	Control, communication	Brain, spinal cord

Additional info:

• Some content was expanded for clarity and completeness based on standard Anatomy & Physiology curriculum.