Hi everyone, there is a lot of conflicting evidence and information online so I just wanted to clear this up.
Lipid soluble hormones (steroids) can pass through the plasma membrane just by diffusion or do they need to bind to something beforehand?
Water soluble hormones can just pass through the membrane or do they need to bind to receptors on the cell membrane (I read that protein/polypeptides need to anyway, so do they need to do that?)
Also tyrosine derivatives (thyroxine, catecholamines) are the same as amino acid derivatives - soluble in water?
Cortisol is water soluble so does it pass through the membrane or bind to receptors?
Thank you guys in advance!! @AriHoresh