Food is contained in the gastrointestinal tract from the time of ingestion until It is completely digested and the waste prepared for elimination.
True
The circular folds of the small intestine enhance absorption by causing the chyme to spiral, rather than move in a straight line, as it passes through the small intestine.
True
As food passes through the digestive tract, it becomes less complex and the nutrients are more readily available to the body.
True
Some of the microbes that often invade other organs of the body are rarely found in the stomach. The reason for this is the presence of HCI.
True
Kupffer cells are found in the liver and are responsible for removing bacteria and worn-out cells.
True
The pharyngeal-esophageal phase of swallowing is involuntary and is controlled by the swallowing center in the thalamus and lower pons.
False
All the chemical ad mechanical phases of digestion from the mouth through the small intestine are directed toward changing food into forms tha can pass through the epithelial cells lining the mucosa into the underlying blood and lymphatic tissue
True
Pepsinogen is the precursor to the gastric enzyme for protein digestion and is secreted by the parietal cells.
False
The main chemical activity of the stomach is to begin the digestion of proteins.
True
The major role of absorption in the ileum is to reclaim bile salts to be recycled back to the liver.
True
The peritoneum is the most extensive serous membrane in the body.
True
Peyers patches are found in the submucosa of the distal end of the small intestine.
True
The myenteric nerve plexus provides the major nerve supply to the GI tract wall and controls GI motility.
Tre
The first teeth to appear are the deciduous teeth.
True
Dentin anchors the tooth in place.
False
The digestive function of the liver is to produce bile.
True
The pancreas has both an endocrine and an exocrine function
True
Another term for swallowing is deglutition.
True
The intrinsic ability of visceral smooth muscle to exhibit the stress-relaxation response is termed plasticity.
True
The stomachs contractile rhythm is set by pacemaker cells found in the spinal cord.
False
The major stimulus for production of intestinal fluid is distension or irritation of the intestinal mucosa by hypertonic or acidic chyme.
True
Most nutrients are absorbed through the mucosa of the intestinal villi by active transport.
True
Ionic iron is actively transported into the mucosal cells, where it binds to the protein ferritin, a phenomenon called the mucosal ion barrier.
True
Mumps is an inflammation of the parotid glands caused by myxovirus.
True
Fats significantly delay the emptying of the stomach
True
The soft palate rises reflexively to open the nasopharynx when we swallow food.
False