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.
What is ISO. ISO is the abbreviation of International Organization for Standardization originated from Greek ISOS which means Equal. Though non-governmental, ISO is still a very important global organization. In reference to video, ISO refers to a file format of an optical disc such as CD, DVD or Blu-ray Disc.ISO actually owned its name from the ISO 9660 file system and is used together with CD-ROM media. Act as a virtual CD/DVD drive. ISO image file can be mounted to a virtual drive as if a physical disc was loaded in the drive or treated as a regular Compact Disc inside a computer while maintaining the original structure of CD/DVD, which is convenient for further DVD burning;