Arterial walls contain a thick layer of smooth muscle and an abundance of collagen and elastin fibers
Indicate whether the statement is true or false
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When you "pull your tummy in" and compress your abdomen, you use the rectus abdominis, external abdominal oblique, internal abdominal oblique, and transversus abdominis muscles. This is an example of muscles working as ________.
A. synergists B. fixators C. cooperatives D. antagonists E. prime movers
John encounters a bear while hiking. His heart will respond in all of the following ways except
A) increasing preload. B) increasing heart rate. C) increasing contractility. D) decreasing heart rate and contractility. E) increasing venous return.
Which type of epithelium has the following characteristics: multiple layers, squamous cell shape, dead outer layers of cells, and keratin present in some cells?
A. stratified keratinized squamous epithelium B. pseudostratified keratinized squamous epithelium C. simple transitional epithelium D. simple cuboidal epithelium E. moist stratified squamous epithelium
What is the purpose of the mucociliary escalator mechanism?
A. To dilate passageways at the superior end of the respiratory tract. B. To move inhaled air through the rest of the respiratory tract C. To propel contaminants towards the pharynx for removal from the respiratory tract D. To elevate the oxygen content of the inspired air through chemical means E. To transport gases through the mucous membrane