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_______________________ are the leading ions that travel quickly to the positive electrode when the pH of the buffer is 6.8.

Only _____ can be absorbed by the small intestines.

The _____ of intestinal crypts secrete antimicrobial agents such as defensins and lysozyme.

The acinar cells of the pancreas secrete _____.

The _____ layer of the alimentary canal lines the lumen and secretes mucus, digestive enzymes, and hormones while also having the capability to absorb the end products of digestion.

The unique _____ layer of the muscularis externa allows the stomach to churn and mix the food (mechanical breakdown).

In ventilation-perfusion coupling, _____ is defined as the amount of blood flow reaching alveoli.

Which of the choices below explains why the small arterioles are known as resistance vessels?

_____ capillaries are the most permeable and have macrophages which inhabit the lining and engulf bacteria that might try to cross the capillary wall.

Atrioventricular valves are anchored to papillary muscles by _____, which holds valves in a closed position during ventricular systole.