On e) f) g) and partb i hope it's brighter now and clear to see

when egg drops into uteris and is ready to be ferfilized,once a month usually in most woman middle of month,hormone is estrogenthat is E, F is progesterone is secreted,from ovaries, placenta, and adrenal glands ,it gets uteris ready to accept implant and maintain a fertilized egg,the hormone prevents muscle contractions from happening on uteris that would cause a woman's body to reject a fertilized egg..Bquestion 1all major system begin to form neural tube which becomes brain and spinal cord digestive system and heart and circulatory system begins to form,the begins of eyes and ears,and tiny limbs call buds appear which will develop into arms an legspart b question 2 look up on Google this is all I have in my brain

after a the power stroke, adp is released, but the cross-bridge formed is still in place. atp then binds to myosin, moving the myosin to its high-energy state, releasing the myosin head from the actin active site.