Can i put a better CPU or video card in my Dell Inspiron 1545?

My question is can i put a better or gaming video card or CPU into my dell inspiron 1545 laptop. Im a gamer and trying to get better quality maybe a Nvida Geforce or anything that wuld improve my preformance thank you.|||Basically no as the video/graphics card is a chip set made into the mother board and not upgradable.