In a stringed musical instrument, the sound frequency of a particular string can be increased by
a. tightening the string.
b. loosening the string.
c. lengthening the string.
d. increasing the string's thickness.

Which part of the neuron below is indicated by the arrow, and what is its function? hormones send chemical signals throughout the body to regulate other body processes. hormones are chemical signals that are sent throughout the body to regulate other body processes. hormones send electrical signals throughout the body to regulate other body processes. hormones are electrical signals that are sent throughout the body to regulate other body processes.