Which laryngeal cartilage is primarily responsible for preventing food, liquids, and foreign bodies from entering the lower airways?

The smaller branches of the arterial tree that contain a muscular layer that enables changes in vessel diameter are called _______; these vessels ________

a. resistance vessels; enable the body to control how much blood is directed toward an area based on that area's metabolic needs b. distributive vessels; sense oxygen levels and increase heart rate when the brainstem detects dropping O2 levels or rising CO2 levels c. arterioles; exchange O2 and CO2 and rid the body of waste products d. metabolic vessels; trigger the release of glucose into the circulatory system

Individuals with Alzheimer's disease lack a neurotransmitter, or chemical, that allows messages to pass between nerve cells in the brain

Indicate whether the statement is true or false