act as valves along the gastrointestinal tract to control the flow of food material. Question 14 options:

Sphincters

Salivary glands

Circular muscles

Longitudinal muscles

What economic effects might result from the depletion of groundwater supplies from the ogallala aquifer? need to know asap

As you sit in the library with your friend studying for your weekly quiz on the integumentary system, you come upon an article about the hazards of prolonged exposure to the sun's rays. your curious nature leads you to research the subject further. you're fascinated to learn that minimal exposure to the sun allows you skin to manufacture vitamin d, which is important to maintain homeostasis. you also read that although sunscreen can protect you from the ultraviolet (uv) rays of the sun, some medications can actually increase a person's sensitivity to the sunlight.

What can you do to support your own mental health and physical health?