What is the chemical formula for water?
H2O
CO2
NaCl
C6H12O6
The Correct Answer is A
The chemical formula for water is H2O. It consists of two hydrogen atoms and one oxygen atom.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
The three germ layers that form during embryonic development are the ectoderm, mesoderm, and endoderm. The ectoderm is the outermost layer, and it gives rise to the skin, hair, nails, and nervous system. The nervous system develops from a specialized region of the ectoderm called the neural plate, which invaginates to form the neural tube. The neural tube ultimately gives rise to the brain and spinal cord, which make up the central nervous system, as well as the peripheral nervous system.
Correct Answer is C
Explanation
Diaphragm is responsible for regulating breathing rate and depth. It is a dome-shaped muscle located at the bottom of the chest cavity that contracts and relaxes to help move air in and out of the lungs.
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