Hypothalamic–pituitary–gonadal axis controls development, reproduction, and aging in animals. Gonadotropin-releasing hormone (GnRH) is secreted from the hypothalamus by GnRH-expressing neurons. The anterior portion of the pituitary gland produces luteinizing hormone (LH) and follicle-stimulating hormone (FSH), and the gonads produce estrogen and testosterone. In oviparous organisms (e.g. fish, reptiles, amphibians, birds), the HPG axis is commonly referred to as the hypothalamus-pituitary-gonadal-liver axis (HPGL-axis) in females. Many egg-yolk and chorionic proteins are synthesized heterologously in the liver, which are necessary for oocyte growth and development. Examples of such necessary liver proteins are vitellogenin and choriogenin. The HPA, HPG, and HPT axes are three pathways
Tank controls 3D games. Most first-person shooter games still use a version of tank controls with the WASD keys, but the use of a mouse or analog stick makes turning easy. Tank controls Tank controls refers to a control system used in video games. In a game with tank controls, players control movement relative to the position of the player character. Pressing up (for example on a D-pad, analog stick, or cursor movement keys) on the game controller moves the character in the direction they face, down reverses them, and left and right rotates them. This differs from many 3D games, in