Cell signalling & gene expression (2025)
This lesson explores how intracellular receptors can affect gene expression. In particular, it looks at how the hormones oestradiol, progesterone and testosterone bind to intracellular receptors to affect the gene expression in their target cells. Positive and negative feedback pathways are then considered. How can a group of hormones cause a regular cycle like the menstrual cycle? What is negative feedback? Once a...