From where do signals for parturition originate and what does maternal pituitary release for stimulating uterine contrations for child birth?

Where do the signals for parturition originate from in humans?

From where the parturition signals arise mother or foetus? Mention the main hormone involved in parturition.

What evivence do we have for the origin of life from inanimate matter?

These questions consist of two statements each,printed as Assertion and Reason.While asnwering these questions you are required to chose any one of the following four responses. If both Assertion and Reason are true and Reason in correct explanation of Assertion. If both assertion and Reason are true but reason is not correct explanation of Assertion. If Assertion is true but Reason is false. If both Assertion and Reason are false. Assertion:Oxytocin is a birth hormone and milk-forming hormone. Reason:Oxytocin is secreted from posterior lobe of pituitary gland and controls the contraction of uterine muscles at the time of implantation.

A motor car moving at a speed of 72 km /h can not come to a stop in less than 3.0 s while for a truch this time interval is 5.0s On a highway the car is behind the truck both moving at 72 km /h The truck geives a signal that it is going to stop at emergency. At what distance the car should be from the truck so that it does bot bump onto (collide with) the truck. Human responde time id 0.5 s. (comment : This is to illustrate why vehicles carr the message on the rear side. "Keep safe Distance").

Where does the torch get electricity from? Why do we need a switch in the torch?