The body of a dead animal becomes very stiff in a condition called “rigor mortis”. which of the following is not a factor in the development of rigor mortis? calcium is released from calcium stores inside muscle cells. tropomyosin proteins do not block myosin binding sites along actin filaments. myosin heads remain bound to actin filaments after their power stroke. calcium binds to the troponin complex. lack of atp synthesis causes a failure of myosin heads to bind to actin filaments.

Myosin heads remain bound to actin filaments after their power stroke.

i think that d. wind is the answer.   i missed the question when i answered a. currents.

"menstrual cycle is a complex cycle that consists of several processes. order of occurrence of steps in menstrual cycle are as follows:

1. high progesterone levels maintain the endometrium lining of the uterus.

2. endometrium lining breaks down and low levels of estrogen stimulate the pituitary to release fsh and lh.

3. fsh and lh stimulates the follicles to develop and the oocyte to produce estrogen.

4. rising estrogen levels suppress fsh production and development of other follicles.

5. a spike in lh causes follicle to rupture.

6. a breakdown of corpus luteum causes progesterone level to drop."