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.
Floating ISO is intended for use with zoom lenses with varying full. stops. When set to ON, it can compensate their changing effective. apertures while zooming in the following situations: ââ in manual exposure control mode ââ ISO is set to one of the values, i.e. not to Auto ISO . Clear as mud, isn't it .....