Biological basis of schizophrenia | Behavior | MCAT | Khan Academy

– [Voiceover] In this video I’m going to talk about the biological basis of schizophrenia. Schizophrenia which is a common long-term mental disorder that causes a large amount of distress and disability. Schizophrenia is the prototype of the category of mental illness called the “psychotic disorders.” Let me just write that. Psychosis, and “psychosis” refers…

What is chlamydia? | Infectious diseases | NCLEX-RN | Khan Academy

– [Voiceover] Chlamydia is the most common sexually transmitted infection in the world. Sexually transmitted infection. And you might recall from our conversation about gonorrhea, chlamydia often co-infects with gonorrhea, or they tend to occur together. Now there are several species of chlamydia that exist, but when we talk about the most common STI that’s…

Germ layer derivatives | Behavior | MCAT | Khan Academy

– Now if you’ll remember from near the end of early embryogenesis, you’ve gone through the process of gastrulation, and you’ve formed your three primary germ layers, and those germ layers were the endoderm, the mesoderm, and the ectoderm. And the cells in these germ layers go on to form very specific structures. Endodermal cells…