Finally, do not apply asphalt over a newly sealed surface. The surface should be grey, much like the street in front of your house. Although the binder coat may last by itself, a finer aggregate top coat will provide a surface that is more resistant to water infiltration and damage.
24. Gases in the alveoli must cross two layers of epithelium and a layer of fused basement membrane to reach the blood. True. False. 25. There are two folds of muscle and connective tissue in the larynx called the vocal cords or vocal folds; the inferior pair are the true vocal cords involved in speech.4. Gases in the alveoli must cross two layers of epithelium and a layer of fused basement membrane to reach the blood. True. False. 25. There are two folds of muscle and connective tissue in the larynx called the vocal cords or vocal folds; the inferior pair are the true vocal cords involved in speech.
The larynx (voice box) is located at the top of the trachea (windpipe). The larynx contains the vocal cords. Vocal cords vibrate and allow us talk and sing. The opening to the larynx is covered by a large muscular flap called the epiglottis. The epiglottis covers the windpipe when we swallow, to prevent food from entering the trachea. The muscles of the larynx also help close the opening to the airway.