Course: Biology

by: Salman Khan , Khan Academy subject: Biology & Bio Technology

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Course description

Covers topics seen in a first year college or high school biology course.
Lectures

Lecture #1: Introduction to Evolution, Variation in a Population and Natural S...
Introduction to evolution, variation in a population and natural selection....
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Lecture #2: Arguments for Intelligent Design and Evolution...
The argument that evolution speaks to being the most "intelligent design"....
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Lecture #3: Clarifying Points on Evolution...
Clarifying some points on evolution and intelligent design....
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Lecture #4: The Owl Butterfly: Natural Selection...
How the "Owl Butterfly" may have gotten the spot on its wings....
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Lecture #5: DNA: Introduction...
An introduction to DNA....
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Lecture #6: How Variation in a Species Can Be Introduced...
How variation can be introduced into a species....
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Lecture #7: DNA: Chromosomes, Chromatides, Chromatin, etc....
The vocabulary of DNA: chromosomes, chromatids, chromatin, transcription, transl...
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Lecture #8: Understanding Mitosis, Meiosis, and Sexual Reproduction...
Mitosis, meiosis and sexual reproduction. Understanding gametes, zygotes, and ha...
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Lecture #9: Mitosis...
Explanation of the phases of mitosis....
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Lecture #10: Meiosis...
The phases of Meiosis....
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Lecture #11: Embryonic Stem Cells: Early Development...
An overview of early development of a zygote to an embryo. Embryonic and somatic...
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Lecture #12: Cancer: Broken DNA Replication...
An introduction to what cancer is and how it is the by-product of broken DNA rep...
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Lecture #13: Heredity: Genetics and Traits...
Heredity and Classical Genetics. Dominant and recessive traits. Heterozygous and...
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Lecture #14: Punnet Square Fun Overview...
Dihybrid crosses. Independent assortment. Incomplete dominance. Codominance and ...
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Lecture #15: Hardy-Weinberg Equilibrium...
Understanding allele and genotype frequency in population in Hardy-Weinberg Equi...
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Lecture #16: Gender: Sex Linked Traits...
Chromosomal basis for gender. Sex-linked traits....
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Lecture #17: Bacteria Introduction...
Introduction to bacteria....
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Lecture #18: Viruses Introduction...
Introduction to viruses....
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Lecture #19: Adenosine Triphosphate: ATP Introduction...
Introduction to ATP or Adenosine Triphosphate....
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Lecture #20: Cellular Respiration...
Introduction to cellular respiration, glycolysis, the Kreb's Cycle, and the elec...
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Lecture #21: Oxidation and Reduction Overview...
Taking a looking at oxidation and reduction in a biological context....
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Lecture #22: Introduction to Oxidation and Reduction in Cellular Respiration...
Oxidation and reduction in cellular respiration. Reconciling the biology and che...
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Lecture #23: Glycolysis Introduction...
Overview of glycolysis....
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Lecture #24: Krebs and the Citric Acid Cycle...
Overview of the Krebs or Citric Acid Cycle....
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Lecture #25: Electron Transport Chain...
Overview of the Electron Transport Chain....
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Lecture #26: Oxidative Phosphorylation and Chemiosmosis ...
Oxidative Phosphorylation and Chemiosmosis (along with slight correction of prev...
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Lecture #27: Photosynthesis...
Overview of photosythesis....
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Lecture #28: Photosynthesis: Details of Light Reactions ...
Details on the light-dependent reactions of photosynthesis....
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Lecture #29: Calvin Cycle or the Light-independent Reactions of Photosythesis ...
More detail on the light reactions and photophorylation....
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Lecture #30: Calvin Cycle and Photorespiration Part 2...
The Calvin Cycle or the light-independent (dark) reactions of photosythesis....
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Lecture #31: C-4 Photosynthesis: How Some Plants Avoid Photorespiration ...
C-4 Photosynthesis: How some plants avoid photorespiration....
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Lecture #32: CAM Plants...
How CAM Plants are able to fix carbon at night so they don't have to keep their ...
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Lecture #33: Cell Parts...
Parts of a cell: nucleus, ribosomes, endoplasmic reticulum, Golgi bodies, mitoch...
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Lecture #34: Diffusion and Osmosis...
Diffusion and Osmosis....
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Lecture #35: The Lungs and Pulmonary System...
The pulmonary system including the lungs, larynx, trachea, bronchi, bronchioles,...
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Lecture #36: Red Blood Cells: Oxygen Uptake by Hemoglobin...
Oxygen uptake by hemoglobin in red blood cells....
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Lecture #37: Circulatory System and the Heart...
Introduction to the circulatory system and the heart....
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Lecture #38: Hemoglobin...
Hemoglobin and its role in the circulatory system....
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Lecture #39: Neuron: Anatomy...
Introduction to the neuron and its anatomy....
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Lecture #40: Sodium Potassium Pump...
How a sodium potassium pump can maintain a voltage gradient across a cell or neu...
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Lecture #41: Electronic and Action Potentials...
Correction to Sodium and Potassium Pump Video....
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Lecture #42: Saltatory Conduction in a Neuron...
How electrotonic and action potentials propagate down cells....
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Lecture #43: Neuronal Synapsis (Chemical)...
How one neuron can stimulate (or inhibit) another neuron at a chemical synapse....
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Lecture #44: Myosin and Actin...
How myosin and actin interact to produce mechanical force....
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Lecture #45: Tropomyosin and Troponin...
Tropomyosin and troponin and their role in regulating muscle contraction. How ca...
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Lecture #46: Role of the Sarcoplasmic...
The role of the sarcoplasmic reticulum in controlling calcium ion concentrations...
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Lecture #47: Muscle Cell Structure...
Understanding the structure of a muscle cell....
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Lecture #48: Role of Phagocytes in Innate or Nonspecific Immunity...
Role of phagocytes in innate or nonspecific immunity. Neutrophils, macrophages, ...
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Lecture #49: Innate and Adaptive Humoral vs. Cell-Mediated Immune Responses...
Overview of types of immune responses. Difference between innate and adaptive im...
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Lecture #50: B Cells: B Lymphocytes...
Overview of B cells (B lymphocytes) and how they are activated and produce antib...
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Lecture #51: Professional Antigen Presenting Cells (APC) and MHC II Complexes ...
How professional antigen presenting cells present parts of engulfed pathogens on...
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Lecture #52: Helper T Cells: Activating B Cells...
Introduction to helper T cells and their role in activating B cells....
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Lecture #53: Cytotoxic T Cells: Activation by MHC-Vantigen Complexes...
How cytotoxic T cells get activated by MHC-I/antigen complexes and then proceed ...
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Lecture #54: Review of B Cells, CD4+ T Cells and CD8+ T Cells ...
Review of B cells, CD4+ T cells and CD8+ T cells....
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Lecture #55: Inflammatory Response ...
Overview of the inflammatory response....
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Lecture #56: Kidney Function...
Overview of how the nephrons in the kidney filter blood and reabsorb water and o...
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Lecture #57: Secondary Active Transport in the Nephron ...
Secondary Active Transport in the Nephron....
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