4. During lactation (milk production), the suckling by the baby stimulates the production of hormone oxytocin, which in turn causes contraction of smooth muscle surrounding the milk ducts,
causing milk to flow. The flow of milk increases the suckling by the baby and more oxytocin is
produced
What is the stimulus?
What is the effector?
What is the response?
Is this a negative or positive feedback?

An enzymatic hydrolysis of fructose-1-p, fructose-1-p(aq) + h2o(l) - fructose (aq) + pi (aq) was allowed to proceed to equilibrium at 25°c. the original concentration of fructose-1-p was 0.2 m, but when the system had reached equilibrium, the concentration of fructose-1-p was only 6.52 x 10^-5 m. calculate the equilibrium constant for this reaction and the free energy of hydrolysis of fructose-1-p.