Review the image(s) and answer the following questions.

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1		What is the function of the hydrochloric acid secreted by the gastric pits of the mucosa?
			A)	regulates the release of intrinsic factor
			B)	activates pepsinogen and provides an acid environment in which this enzyme works best
			C)	kills microbes inhabiting the mucosa
			D)	initiates the hunger reflex
2		What is the role of the pyloric sphincter?
			A)	regulates passage of food into the stomach
			B)	prevents food from reentering the esophagus
			C)	regulates the passage of chyme into the small intestine
			D)	controls the release of the hormone gastrin

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3		Monosaccharides are absorbed into the mucosal lining of the small intestine using what process?
			A)	active transport
			B)	facilitated diffusion
			C)	pinocytosis
			D)	both "A" and "B"
4		Amino acids are absorbed into the mucosal lining of the small intestine using what process?
			A)	active transport
			B)	facilitated diffusion
			C)	pinocytosis
			D)	both "A" and "B"

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5		Mammal and bird circulation differs from that of other groups of animals in what way?
			A)	Mammals and birds have fully separated ventricles.
			B)	Mammals and birds have four-chambered hearts.
			C)	Mammals and birds have atria.
			D)	Mammals and birds have coronary vessels that feed heart muscle.
6		Mammals and birds both have which of these?
			A)	arteries
			B)	arterioles
			C)	capillaries
			D)	All of these are correct.