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Photosynthesis : Photosynthesis: Light Reactions 1

By: Sal Khan

Details on the light-dependent reactions of photosynthesis

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

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Photosynthesis : Photosynthesis: Calvin Cycle

By: Sal Khan

The Calvin Cycle or the light-independent (dark) reactions of photosythesis

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

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Immunology : Helper T Cells

By: Sal Khan

Introduction to helper T cells and their role in activating B cells

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

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Cells and cell division : Cancer

By: Sal Khan

An introduction to what cancer is and how it is the by-product of broken DNA replication

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

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Tree of life : Viruses

By: Sal Khan

Introduction to viruses

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

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Tree of life : Human Prehistory 101 Part 3: Agriculture Rocks Our ...

By: Sal Khan

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

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Cellular respiration : Oxidative Phosphorylation and Chemiosmosis

By: Sal Khan

Oxidative Phosphorylation and Chemiosmosis (along with slight correction of previous video)

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

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Cells and cell division : Phases of Mitosis

By: Sal Khan

Explanation of the phases of mitosis.

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

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Human biology : Electrotonic and Action Potentials

By: Sal Khan

How electrotonic and action potentials propagate down cells

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

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Cellular respiration : Krebs / Citric Acid Cycle

By: Sal Khan

Overview of the Krebs or Citric Acid Cycle

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

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Human biology : Red blood cells

By: Sal Khan

Oxygen uptake by hemoglobin in red blood cells

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

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Cellular respiration : Oxidation and Reduction in Cellular Respiration

By: Sal Khan

Oxidation and reduction in cellular respiration. Reconciling the biology and chemistry definitions of oxidation and reduction.

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

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Human biology : Hemoglobin

By: Sal Khan

Hemoglobin and its role in the circulatory system

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

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Human biology : The Lungs and Pulmonary System

By: Sal Khan

The pulmonary system including the lungs, larynx, trachea, bronchi, bronchioles, alveoli and thoracic diaphragm

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

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Heredity and genetics : Introduction to Heredity

By: Sal Khan

Heredity and Classical Genetics. Dominant and recessive traits. Heterozygous and homozygous genotypes.

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

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Human biology : Anatomy of a Neuron

By: Sal Khan

Introduction to the neuron and its anatomy

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

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Human biology : Anatomy of a muscle cell

By: Sal Khan

Understanding the structure of a muscle cell

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

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Immunology : Professional Antigen Presenting Cells (APC) and MHC I...

By: Sal Khan

How professional antigen presenting cells present parts of engulfed pathogens on MHC II complexes (major histocompatibility complexes).

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

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Human biology : Sodium Potassium Pump

By: Sal Khan

How a sodium potassium pump can maintain a voltage gradient across a cell or neuron's membrane

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

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Evolution and natural selection : Variation in a Species

By: Sal Khan

How variation can be introduced into a species.

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

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