Search over 10,000 free study notes

The alveoli are like small sacks present at the base of the lung, and are the site of exchange between the air we breathe and our blood. This exchange occurs by the process of diffusion, for which alveoli...

HIV is a retrovirus that infects specifically T helper cells / CD4 cells in the body.the glycoprotein (envelope protein) on the surface of the virus is able to bind to receptors on CD4 cells, and causes t...

complementary base pairing - new strand can be synthesised based on the base sequence on the template strand, so that the resulting strand synthesised is identical to the coding strand.
hydrogen bon...

The renal corpuscle is composed of the glomerulus and Bowman's capsule. Filtration occurs at the glomerulus, and filtrate is collected at the Bowman's capsule. A basement membrane lies between the glomeru...

Thermoreceptors in the skin and hypothalamus detect low temperature and send impulses to the heat gain centre inthe thermoregulatory center in the hypothalamus. This heat gain centre sends out impulses to...