What is the key function of sphincters found along the digestive system? a. they selectively allow and stop passage of partially digested food. b.they control and direct the quantity of food passing through the digestive organs and prevent backward movement of partially digested food. c.they improve the muscular strength of the organs involved in digestion.

Monitor and apply fix up stratorgies

The steps in the formation of extrusive igneous rocks are listed below in an incorrect order: 1. rock melts due to high temperature. 2. rock is buried deep under earth's surface. 3. magma is forced out of earth's surface during volcanic eruption. 4. lava cools and crystallizes to igneous rock. which of these best shows the correct order of steps in the formation of extrusive igneous rocks? 1, 3, 4, 2 2, 1, 3, 4 3, 4, 2, 1 4, 2, 1, 3

What condition is kept close to its set point in osmoregulation? a. body temperature b.platelet count c.blood glucose level d.water balance