Sertoli cells have receptors for follicle stimulating hormone (FSH) and testosterone which are the main hormonal regulators of spermatogenesis. Hormones such as testosterone, FSH and luteinizing hormone (LH) are known to influence the germ cell fate. Their removal induces germ cell apoptosis.
In very basic terms, ISO is the level of sensitivity of your camera to available light. The lower the ISO number, the less sensitive it is to the light, while a higher ISO number increases the sensitivity of your camera. The component within your camera that can change sensitivity is called âimage sensorâ or simply âsensorâ.
An ISO file, often called an ISO image, is a single file, perfect representation of an entire CD, DVD, or BD.The entire contents of a disc can be precisely duplicated in a single ISO file.he most common way to make use of an ISO file is to burn the ISO file to a CD, DVD, or BD disc. It's a different process than burning a bunch of music or document files to a disc because your CD/DVD/BD burning software must assemble the contents of the ISO file onto the disc.