The gastrointestinal tract lining changes along its length. Choose one section of the tract that has a simple epithelium and one section that has a stratified epithelium, and for each section describe the specific epithelium present and how that type of epithelium suits the organ's function.
What will be an ideal response?
A variety of answers are possible, but an obvious example follows. The oral cavity and pharynx have stratified squamous epithelium to contend with the friction of the food that is ingested. The small intestine has a simple columnar epithelium with many secretory cells; this epithelium is thin and has many microvilli (large surface area) to allow for efficient absorprtion and secretion.
You might also like to view...
The elevated oxygen consumption relative to activity level after exercise has ended is called
A. oxygen deficit. B. anaerobic recovery. C. oxygen debt. D. excess post-exercise oxygen consumption. E. oxygen repayment.
Immediately after an action potential is propagated, which one of the following ions rapidly diffuses out of the cell into the tissue fluid?
A) sodium ions B) chloride ions C) calcium ions D) potassium ions E) magnesium ions
The formal term for the sense of gravity, rotation, and linear acceleration is the sense of
A) proprioception. B) hearing. C) nociception. D) equilibrium. E) vision.
Answer the following statements true (T) or false (F)
1. The external urethral sphincter is under voluntary control. 2. Urinary catheterization is a successful treatment for suppression. 3. Urinary catheterization is a successful treatment for retention. 4. In suppression, the kidneys are still functioning normally. 5. In retention, the kidneys are no longer producing urine.