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2015-04-29 08:12:37
physiology lf2

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  1. Secretion of saliva
    a) is stimulated by chemical stimuli in the mouth
    b) is inhibited by atropine
    c) is stimulated by increased parasympathetic activity
    d) can be affected by thoughts of food
    e) equals 5 - 6 l per 24 hours
    all except e
  2. Rhythmic motility of the small intestine:
    a. is inhibited by adrenaline
    b. grows in frequency as we go from the duodenum to ileum
    c. is about 1 contraction per minute
    d. is inhibited by parasympathetic cholinergic fibres
  3. Gastric peristalsis:
    a. is inhibited by sympathetic activity
    b. occurs with a frequency of 3/min
    c. is speeded up by increased vagal activity
    d. is bigger in the antrum than in the fundus
    e. is blocked by curare
    all except e
  4. he average production of gastric juice is:
    a. 0.1 l
    b. 0.1-0.5 l
    c. 1-3 l
    d. 5-10 l
    e. 15-20 l
  5. Secretion of gastric juice is
    a) inhibited by small amount of alcohol in the stomach
    b) started when we see food
    c) stimulated by presence in the stomach of proteins and amino acids
    d) inhibited by gastrin when pH in the stomach drops below some level
  6. Which of these substances stimulate production of gastric acid?
    a. acetylcholine
    b. secretin
    c. gastrin
    d. histamine
    e. koffein
    f. ptyalin
  7. Release of gastrin is:
    a. inhibited by the expansion of the stomach
    b. stimulated by the inreased activity of the vagus
    c. inhibited by strong acidification (<3.5) of the stomach contents
    d. stimulated by products of protein digestion
  8. Which of these substances stimulate the secretion of bicarbonate by the pancreas most?a. gastrin
    b. secretin
    c. pancreatic lipase
    d. cholecystokinin (aka pancreozymin)
    e. histamine
  9. Which one of these substances does not affect the secretion of gastric and pancreatic juice?
    a. pancreatic lipase
    b. gastrin
    c. cholecystokinin
    d. secretin
    e. histamine
  10. Which one of these statements about bile is correct?
    a. The amount of bile that liver produce in 24 hours is roughly equal to the amount of saliva produced by salivary glands.
    b. Bile does not contain any digestive enzymes.
    c. 90% of bile acids that enter the intestines with bile are excreted in the feces.
    d. The emptying of the gallbladder is controlled by enterohormones.
    e. Bile is also secreted between meals.
  11. Cholecystokinin mostly stimulates:
    a. production of gastric acid
    b. secretion of bicarbonate in the pancreas
    c. production of bile in the liver
    d. thickening of bile in the gallbladder
    e. contractions of the gallbladder
  12. cholecystokinin:
    a. stimulates the outflow of bile from the gallbladder into the duodenum
    b. is produced within the lumen of the small intestine by fat as a prohormone and is transported into the liver and gallbladder with blood.
    c. suppresses production of bile in the liver.
    d. stimulates the peristaltic movements in the intestines.
  13. The liver synthesises and secretes (into the bloodstream):
    a. fibrinogen
    b. prothrombin
    c. chylomicrons
    d. transferrin
    e. cholecystokinin
  14. Which one of these statements is correct?
    a. The Brunner's glands in the duodenum secrete fluid that has a neutral pH.
    b. The role of the gallbladder is to secrete bile.
    c. Bile can only be produced with the help of some enterohormones.
    d. Secretin does not influence pancreas secretion.
    e. None of the above is correct.
  15. Which one of the following statements about the small intestine is NOT correct?
    a. Rhythmic segmentation serves to mix chyme.
    b. Propulsive peristaltic waves empty the small intestine 4 - 10 hours after the consumption of food.
    c. Vagal stimulation increases the motility of intestinal villi.
    d. The content of the ileum is isotonic with blood plasma.
    e. The extension of the intestinal wall leads to a relaxation of its smooth muscle.

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