_______ is the most common neurotransmitter released by neurons controlling skeletal muscle contraction.

Fill in the blank(s) with the appropriate word(s).


Ans: Acetylcholine

Biology & Microbiology

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How many DNA triplets encode 60 amino acids?

A. 180 B. 30 C. 20 D. 60

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Matching II. Choose the one most appropriate

response for each. Letters may be used more than once. 1. ___ muscle cells 2. ___ lining of the intestine 3. ___ nervous system 4. ___ external body covering 5. ___ skeletal system 6. ___ circulatory system 7. ___ stomach, liver, and pancreas (excluding the muscles and nerves) A. develop(s) from ectoderm in embryo B. develop(s) from endoderm in embryo C. develop(s) from mesoderm in embryo

Biology & Microbiology

What is radiometric dating?

A) The process of determining the age of a fossil from radioactive isotopes B) The mineralization process by which living things are turned into fossils C) The process of determining the age of a fossil based on which layer in the rock it is found D) The process of determining the age of a fossil using radio waves

Biology & Microbiology

Which of the following is part of the small intestine?

a) ileum b) colon c) Pylorus d) Cecum

Biology & Microbiology