The purpose of the mucus found within the respiratory system is to a. move air through the windpipe. b. trap particles from the air before they reach the lungs. c. lubricate the epiglottis. d. push the cilia away from the lungs.

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.

Which is the best example of plant tissue? the answer is d (just took the test)

Which of the following cell structures is significantly different between gram- positive and gram-negative bacteria?