Answer the following statement(s) true (T) or false (F)
1. The enteric nervous system regulates much of the digestive activity, but its action depends on the central nervous system.
2. Enamel is found in the crown of a tooth, whereas dentin is part of both the crown and the root.
3. Both chemical and mechanical digestion start in the mouth and continue in the stomach.
4. Absorption of many nutrients starts in the stomach.
5. Both pancreatic juice and bile are secreted into the duodenum.
6. The large intestine is longer than the small intestine.
1. False
2. True
3. True
4. False
5. True
6. False
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With increasing age, the lymphatic system becomes unable to transport lymph from body tissues and fat from the gastrointestinal tract.
Answer the following statement true (T) or false (F)
Neurons have four functional zones and each performs a task required for communication. What are these four zones and what structural features found in each allow it to perform its function?
What will be an ideal response?
Active immunity
A. occurs when antibodies are given. B. occurs against an individual's own tissue. C. occurs as a result of exposure to antigens. D. means that antibodies are not made by the recipient.
Which of the following is a function of myoglobin?
a. to transport oxygen in the blood b. to hold together the lipid bilayers that collectively form a myelin sheath c. to increase the rate of transfer of oxygen from the blood to the muscle d. to mark foreign bodies for consumption by macrophages e. None of these.