What local reflexes control the GI tract?
What will be an ideal response?
The GI tract has extensive sensory and motor neuron plexuses that communicate along the entire length of the digestive tube. The gastroileal reflex is triggered by stomach distension, causing food to move from the ileum into the colon. Similarly, stomach stretch can trigger reflex mass movements that send chyme into the rectum, promoting a sense of urgency. Another is the gastroenteric reflex, also initiated by stretch receptors in the stomach that stimulates motility and secretion along the entire small intestine. The enterogastric reflex causes the emptying and other movements of the stomach to pause for a few moments when gastric contents contact the duodenal mucosa. This is a good example of local autonomic regulation.
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The largest of the body membranes, commonly called the skin, is the ________ membrane.
A. synovial B. mucous C. serous D. cutaneous E. cartilaginous
A cell that contains 23 pairs of chromosomes is
A. polyploid. B. diploid. C. haploid. D. monoid.
Which of the following factors of the internal environment is not homeostatically maintained?
a. its concentration of nutrient molecules. b. its concentration of nitrogen gas, of which 80% of the atmospheric air is composed. c. its concentration of oxygen and carbon dioxide. d. its pH. e. its temperature.
The process of "cell drinking" is known as phagocytosis.
Answer the following statement true (T) or false (F)