Discuss why pseudostratified ciliated columnar epithelium is an appropriate tissue for the lining of the nasal cavity
What will be an ideal response?
Goblet cells embedded in the mucosa of pseudostratified ciliated columnar epithelium secrete mucus. Foreign particles are trapped in the sticky mucus and propelled to the posterior nasal cavity by cilia present on the apical surface of the epithelium. Contaminated mucus can be swallowed or expelled by sneezing or blowing one's nose.
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What ultimately stops muscle stimulation when the motor neuron ceases firing?
What will be an ideal response?
Which of the following statements about the aging of skin is correct?
A. The skin starts off fairly thick, then loses epithelia until it is only connective tissue. B. The skin starts off fairly thick, then thins steadily as a person ages. C. The skin starts off fairly thin, then thickens through early adulthood, then thins after 50. D. The skin starts off fairly thin, then thickens for a person's entire life.
A group of students has declared a hunger strike to protest a perception of low-quality dorm food. Jose is one of the protesting students and he has not eaten for three days. Most of the energy available in Jose's body is provided by gluconeogenesis.
Answer the following statement true (T) or false (F)
When doing a pushup, your shoulders ________ as your body is pushed upward.
A. protract B. elevate C. supinate D. hyperextend E. retract