To complete gas exchange, ________________________________________ have thin, flexible membrane walls surrounded by a network of microscopic capillaries
Fill in the blank(s) with correct word
alveoli
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Villi
A. are found throughout the gastrointestinal tract. B. generate movement of materials in the large intestine. C. increase surface area in the small intestine. D. contain both smooth and skeletal muscle fibers. E. All of the choices are correct.
Sympathetic stimulation of the heart increases action potential conduction velocity through the AV node
Indicate whether the statement is true or false.
In this view of the larynx, what structure does number 2 indicate?
A. Tracheal cartilage B. Thyroid cartilage C. Hyoid bone D. Cricoid cartilage E. Epiglottis
The atria are separated from the ventricles externally by the
A. posterior interventricular sulcus. B. sinoventricular sulcus. C. anterior interventricular sulcus. D. coronary sulcus.