The effect of acetylcholine can be stimulating or inhibiting. Which of the following gives the best explanation for why this is so?
A) Acetylcholine has many different forms.
B) Acetylcholine has a "dose effect". Larger doses are stimulating while small doses inhibit.
C) Postsynaptic cells have a dynamic and changing metabolism and respond differently at different times.
D) Different post synaptic cells will have different receptors.
D
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Enzymes which finish chemical digestion:
a. are found in the duodenum b. are found in the brush border c. are found in the stomach d. include salivary amylase and pepsin e. are located throughout the digestive tract from beginning to end
Sensory receptors are part of the CNS.
Answer the following statement true (T) or false (F)
Which of the following is the correct complementary strand to CATGTC?
A. GUACAG B. TCGTAT C. CATGTC D. GTACAG E. AGCACA
What organelle packages materials for secretion from the cell?
A. endoplasmic reticulum B. flagellum C. peroxisomes D. Golgi apparatus E. nucleolus