Which of these is not a paranasal sinus?
A. Sphenoid sinus
B. Maxillary sinus
C. Frontal sinus
D. Ethmoid sinus
E. Mastoid sinus
Answer: E
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Cat whiskers are known as ____________
Fill in the blank(s) with correct word
Which of the following is not true of the respiratory irritant receptors?
A. Stimulation of these receptors can lead to coughing or sneezing. B. Sensory impulses from the irritant receptors are transported by the vagus nerve. C. Sensory impulses from the irritant receptors are transported to the dorsal respiratory group. D. Stimulation of the respiratory irritant receptors results in dilations in the bronchial tree. E. All of these are true of the respiratory irritant receptors.
Which of the following organs does not contain lymphocytes?
A. Spleen B. Tonsils C. Thymus D. Red bone marrow E. All of these organs contain lymphocytes.
What is the main action of lysosomes?
a. promote cellular division b. repair the plasma membrane c. destroy free radicals d. produce energy for cells e. break down organic molecules