Which one of the following best describes the order of a somatic reflex?
A) Somatic receptor ? efferent nerve fiber ? afferent nerve fiber ? interneuron ? skeletal muscle
B) Somatic receptor ? interneuron ? afferent nerve fiber ? efferent nerve fiber ? skeletal muscle
C) Somatic receptor ? efferent nerve fiber ? interneuron ? afferent nerve fiber ? skeletal muscle
D) Somatic receptor ? afferent nerve fiber ? interneuron ? efferent nerve fiber ? smooth muscle
E) Somatic receptor ? afferent nerve fiber ? interneuron ? efferent nerve fiber ? skeletal muscle
E
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Which is true about the structure and function of a gene?
A. It is a sequence of nucleotides in DNA that contains information necessary for the synthesis of proteins. B. It is a sequence of nucleotides in DNA that acts as an enzyme to digest proteins. C. It is an uncoiled protein that contains information necessary for the synthesis of other proteins. D. It is composed of many molecules of DNA and contains information needed to make RNA.
If the concentration of sodium chloride in the interstitial fluid surrounding cells decreases and the concentration of other solutes remains constant,
A) the cells will shrink. B) the cells will swell. C) the fluid outside of the cells will become isotonic. D) the fluid outside of the cells will become hypertonic. E) the cells will not change.
Insulin, when released into the bloodstream by the islets of Langerhans, causes blood sugar levels to rise
Indicate whether the statement is true or false
Phagocytosis is important for ________.
body defense against foreign organic matter promoting inflammation removal of old and dying cells All of the choices are correct.