The esophagus
A. secretes digestive enzymes from its mucosa.
B. is located anterior to the trachea.
C. opens to the stomach at the pyloric sphincter.
D. contains both smooth and skeletal muscle fibers.
E. is lined with pseudostratified ciliated columnar epithelium.
D
You might also like to view...
What regulatory proteins can be found in the thin filaments of skeletal muscle fibers?
a) troponin and titin b) tropomyosin and troponin c) myosin and titin d) titin and tropomyosin e) tropomyosin and myosin
Answer the following statements true (T) or false (F)
1. Damaged articular cartilage can typically heal or regenerate on its own. 2. Pre-participation stretching has no effect on overuse type injuries. 3. Studies show that PNF techniques can significantly increase joint range of motion after a single stretching session. 4. Third-degree sprains are the mildest. 5. The most common site for a sprain is the knee.
Why must a surgeon repairing a damaged joint be certain to maintain the shape of the articulating surfaces?
A) This will only be a problem initially, as the joint will alter its shape to adapt to the new configuration. B) Nonmatching articulating surfaces are not a problem; most joints have surfaces that do not match. C) This is not a problem because rapidly growing cartilage will fill in areas that do not match correctly. D) Incorrectly apposed articulating surfaces might develop abnormal ankyloses. E) None of the answers are correct.
What are the least abundant of the formed elements?
A. Basophils B. Platelets C. Neutrophils D. Eosinophils E. Erythrocytes