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The arrival of an action potential at an axon terminal at the neuromuscular junction (NMJ) ultimately results in the release of a neurotransmitter called [acetylcholine] to activate [sarcolemma], the plasma membrane of the muscle fiber.  

True or false: The axon of a neuron can only communicate with other neuronal cells.

Starch in food is broken down by salivary and pancreatic amylase.

Saliva contains the hydrolytic enzyme, salivary amylase, which initiates the breakdown of the polysaccharide ________ into the disaccharide, maltose.

If a person is diagnosed with lactose intolerance, which of the following is likely?

A respiratory system is needed if an organism is too ______________________ to rely on the diffusion of gases through the outer body layer.

After consuming an antacid like Rolaids, ________.

The myofibrils consist of both thin filaments made of actin and thick filaments composed of

The kidneys are important homeostatic organs, contributing to maintenance of all of the following EXCEPT

What do veins have that arteries lack?