The renal ________ is the site at which the renal artery and renal nerve enter and the renal vein exits.
A) cortex
B) medulla
C) column
D) hilum
E) sinus
D) hilum
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Answer the following statements true (T) or false (F)
1. If an individual requires supplemental oxygen, it is first bubbled through water to remove dust and pollen. 2. The pharynx can be considered part of both the respiratory and digestive systems. 3. The auditory tubes open into the oropharynx and help in the equalization of air pressure between the middle ear and external ear. 4. The auditory tubes allow infections in the nasopharynx to spread to the middle ear. 5. The tonsils are located in the larynx.
Which of the following nonmembranous organelles increases surface area?
A) flagellum B) cilia C) microvilli D) microtubules
The specialized cells that produce the pigment melanin are called ________
A) keratinocytes B) melanocytes C) lymphocytes D) stem cells
The ________ provides most of the Ca2+ needed for myocardial contraction.
A. mitochondria B. extracellular fluid C. cytoskeleton D. Golgi apparatus E. sarcoplasmic reticulum