Biology Forums - Study Force

Secretin is a hormone that is secreted by the
 
  A. stomach.
  B. small intestine.
  C. large intestine.
  D. liver.
  E. pancreas.

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(Question 2) An enzyme found within saliva is salivary
 
  A. pancreatase.
  B. nuclease.
  C. amylase.
  D. protease.
  E. pepsin.

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(Question 3) Which of the following is considered to be one of the primary digestive system hormones?
 
  A. Bile
  B. Gastrin
  C. Hydrochloric acid
  D. Pancreatic amylase

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(Question 4) The function of the muscularis of the GI tract wall is to both propel and mix the contents of the tract.
 
  Indicate whether this statement is true or false.

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(Question 5) The type of receptor within the GI tract wall that detects stretch is the
 
  A. steroid receptor.
  B. chemoreceptor.
  C. mechanoreceptor.
  D. retroperitoneal proprioceptor.

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(Question 6) Mechanoreceptors and chemoreceptors are found in the
 
  A. adventitia of the upper portion of the GI tract.
  B. epithelium of the inferior portion of the GI tract.
  C. mucosa and submucosa of the GI tract along its length.
  D. myenteric plexus of the mucosa of the intestine.
  E. muscularis interna of the entire length of the GI tract.

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(Question 7) If a fatty meal has been ingested, the liver and gallbladder need to be alerted about the need for bile. The receptors that are responsible for sensing the fat in the ingested food are refered to as
 
  A. bilireceptors.
  B. mechanoreceptors.
  C. chemoreceptors.
  D. omental neurons
  E. osmodetectors.

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(Question 8) Lipid molecules that are absorbed from the GI tract enter
 
  A. mesenteric arteries.
  B. mesenteric veins.
  C. lymphatic capillaries.
  D. the liver.

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(Question 9) A sphincter is a
 
  A. thickening of the longitudinal layer of the muscularis that propels materials through the GI tract.
  B. thickening of the circular layer of the muscularis that controls movement of materials through the GI tract.
  C. fold of the mucosa of the GI tract that increases the total surface area for absorption of nutrients.
  D. circle of adventitia that anchors the GI tract to neighboring structures.

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(Question 10) The lining of the gastrointestinal tract that allows for absorption and secretion is
 
  A. keratinized stratified squamous epithelium.
  B. nonkeratinized stratfied squamous epithelium.
  C. areolar connective tissue.
  D. simple columnar epithelium.
  E. simple squamous epithelium.

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