The germ layer between the ectoderm and the endoderm is the __________
Fill in the blank with correct word.
mesoderm
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A neuron receives a series of stimuli that increases the membrane permeability of Na+, but not enough to cause membrane potential to surpass -55mV. This neuron is said to be
A. graded. B. amplified. C. refractory. D. facilitated.
Choose the statement that correctly characterizes the GI tract.
A. Body tissues are composed of substrates similar to food; thus, they would be degraded by enzymes in the GI tract if exposed to the internal environment of the GI tract. B. The harsh environment in the GI tract allows for the absorption of indigestible materials without harming body tissues. C. The two openings of the GI tract permit two-way transport of food, which maximizes absorption. D. All of the choices are correct.
In addition to creating a physical barrier to pathogen entry, mucus contains antimicrobial substances such as IgA.
Answer the following statement true (T) or false (F)
What are the major fuel for the body cells?
A. Glucose B. ATP C. Fat D. Protein E. NADH