WorksheetsQuiz sobre Células del Estómago
Total questions: 73
Worksheet time: 37mins
What percentage of the stomach is covered by oxínticas (gastric) cells?
50%
80%
20%
100%
Which of the following is secreted by oxínticas cells?
Gastrina
Mucus
HCL
Pepsina
Where are pilóricas cells located in the stomach?
Antrum
Fundus
Body
Cardia
What is the role of pepsinogen secreted by pilóricas cells?
Neutralize acid
Precursor of pepsin
Stimulate mucus production
Regulate blood flow
What is stimulated by the parasympathetic system during the cephalic phase?
Production of pepsin and acid
Production of insulin
Production of bile
Production of saliva
Which phase involves local nervous secretory reflexes?
Gastric phase
Cephalic phase
Intestinal phase
Absorptive phase
What is the role of gastrin in the digestive process?
Stimulates histamine
Inhibits acid production
Stimulates bile production
Inhibits pepsin production
What is the origin of neurogenic signals in the cephalic phase?
Cerebral cortex, amygdala, and hypothalamus
Spinal cord and medulla oblongata
Cerebellum and thalamus
Pituitary gland and pineal gland
What percentage of gastric secretion occurs during the cephalic phase?
10%
20%
30%
40%
What triggers the gastric phase in the digestive process?
Presence of food in the mouth
Distension in the stomach walls and presence of food
Absence of food in the stomach
Presence of food in the intestines
Which type of reflex is involved in the gastric phase?
Spinal reflexes
Local and parasympathetic reflexes
Sympathetic reflexes
Hormonal reflexes
What is the result of the gastric phase in terms of secretion?
Decrease in gastric juice secretion
Increase in gastric juice and gastrin secretion
No change in secretion
Increase in saliva production
What triggers the short neural reflexes in the intestinal phase?
Distension of the duodenum
Presence of lipids
Low pH levels
Release of gastrin
Which hormone is stimulated by the presence of carbohydrates and lipids during the primary hormonal response?
Gastrin
Secretin
Pepsinogen
Insulin
What is the effect of the intestinal phase on gastric motility?
Increases gastric motility
Reduces gastric motility
Has no effect on gastric motility
Completely stops gastric motility
Which of the following is a proton pump inhibitor used to inhibit acid secretion in the parietal cell membrane?
Omeprazole
Ranitidine
Pirenzepine
Cimetidine
What class of drugs does Ranitidine belong to?
Proton pump inhibitors
H2 receptor antagonists
Muscarinic antagonists
Antacids
Which of the following is a muscarinic antagonist mentioned in the document?
Pantoprazole
Esomeprazole
Pirenzepine
Famotidine
Which of the following is a mucosal protector used in the treatment of peptic ulcer disease?
Sucralfate
Bicarbonate of soda
Magnesium compounds
Calcium compounds
What is the role of "Bismuth salts" in the treatment of peptic ulcer disease?
Antacid
Mucosal protector
Antibiotic
Proton pump inhibitor
Which of the following is an antacid used in the treatment of peptic ulcer disease?
Misoprostol
Aluminum compounds
Sucralfate
Bismuth salts
What is the primary function of proton pump inhibitors (PPIs)?
Increase acid secretion
Inhibit acid secretion
Stimulate enzyme production
Neutralize stomach acid
Which of the following is a first-generation proton pump inhibitor?
Rabeprazole
Esomeprazole
Omeprazole
Pantoprazole
What is required for the restitution of acid secretion after using PPIs?
Increased blood flow
Synthesis of new enzymes
Higher pH levels
Reduced enzyme activity
How do weak bases in the acidic environment of the secretory canaliculi behave?
They dissolve completely
They ionize and get trapped
They neutralize the acid
They evaporate
Which of the following is a first-generation proton pump inhibitor (IBP)?
Rabeprazol
Esomeprazol
Omeprazol
Pantoprazol
Where is the absorption of omeprazole primarily located?
Stomach
Duodenum
Liver
Colon
What is the primary method of elimination for omeprazole?
Sweat
Feces
Orina (Urine)
Lungs
Which of the following statements about omeprazole is true regarding its bioavailability?
It decreases over time.
It remains constant.
It is initially low but increases over time.
It is always high.
Which of the following proton pump inhibitors is not metabolized by the microsomal system?
Omeprazol
Lansoprazol
Rabeprazol
Pantoprazol
Which of the following is a first-generation proton pump inhibitor (PPI)?
Rabeprazole
Esomeprazole
Omeprazole
Pantoprazole
What is a potential adverse effect of prolonged suppression of gastric acid secretion by PPIs?
Hypercalcemia
Hypergastrinemia
Hypoglycemia
Hyperkalemia
What gastrointestinal side effects are associated with PPIs?
Constipation and bloating
Nausea, vomiting, and diarrhea
Heartburn and indigestion
Flatulence and cramps
What is the concern with combining PPIs and clopidogrel?
Increased risk of bleeding
Decreased cardiovascular risk
Decreased plasma level of clopidogrel
Increased absorption of clopidogrel
What is the primary function of H2 receptor antagonists?
Stimulate acid secretion
Inhibit acid secretion
Increase heart rate
Decrease blood pressure
Which of the following is a method of administration for H2 receptor antagonists?
Intravenous only
Oral and parenteral
Topical only
Inhalation
What is the absorption rate of H2 receptor antagonists?
Slow
Moderate
Rapid
Variable
What should be adjusted in patients with renal impairment when administering H2 receptor antagonists?
Frequency of administration
Dosage
Type of medication
Method of administration
Diagram showing the administration and effects of H2 receptor antagonists.
Diagram showing the administration and effects of H2 receptor antagonists.
Diagram showing the administration and effects of beta blockers.
Diagram showing the administration and effects of proton pump inhibitors.
Diagram showing the administration and effects of antacids.
Which of the following is an H₂ antagonist?
Ibuprofen
Ranitidine
Aspirin
Paracetamol
What effect does cimetidine have on cytochrome P450?
Activation
Inhibition
No effect
Enhancement
How does the presence of antacids affect the bioavailability of H₂ antagonists?
Increases it
Decreases it
No change
Doubles it
What is the suggested time interval to space doses of H₂ antagonists when taken with antacids?
1 hour
2 to 3 hours
4 to 5 hours
6 hours
Which of the following is a gastrointestinal adverse effect of H2 antagonists?
Fatigue
Diarrhea
Bradycardia
Confusion
What condition can high doses of cimetidine cause?
Hypertension
Hyperprolactinemia
Hypoglycemia
Hypercalcemia
Which cardiovascular effect is associated with H2 antagonists?
Tachycardia
Bradycardia
Hypertension
Arrhythmia
What neurological effect can H2 antagonists cause?
Euphoria
Aggressiveness
Increased alertness
Insomnia
What type of antagonist is Pirenzepine?
Selective muscarinic receptor M1 antagonist
Selective muscarinic receptor M2 antagonist
Non-selective muscarinic receptor antagonist
Beta-adrenergic receptor antagonist
In which decade was Pirenzepine primarily used?
1970s
1980s
1990s
2000s
Is Pirenzepine a first-choice drug for treating ulcerative disease?
Yes, it is the first choice
No, it is not the first choice
It is only used in emergencies
It is the last resort
What is the duration of action for Sucralfate when taken orally?
2 hours
4 hours
6 hours
8 hours
What is the primary action of Sucralfate?
Systemic absorption
Local action
Hormonal regulation
Enzyme inhibition
How does Sucralfate provide a cytoprotective effect?
By increasing stomach acid
By forming a polymerized paste in acidic medium
By inhibiting bile production
By reducing blood flow
What does Sucralfate bind to for its reparative effect?
Stomach acid
Bile and pepsin
Blood cells
Enzymes
What is the required condition for Sucralfate to act effectively?
Neutral pH environment
Alkaline environment
Acidic environment
High temperature
What is the bioavailability percentage of Sucralfate?
10-15%
3-5%
20-25%
50-55%
Which of the following is a common adverse effect of Sucralfate?
Diarrhea
Constipation
Headache
Nausea
How should Sucralfate be administered to avoid drug interactions?
With antacids
With a 2-hour interval
With meals
With alcohol
In the prevention of stress ulcers in hospitalized patients, what is a benefit of using Sucralfate?
Increases pH
Reduces nosocomial pneumonia
Enhances drug absorption
Causes sedation
What is Misoprostol an analog of?
Alprostadil (PgE1)
Aspirin
Ibuprofen
Acetaminophen
What is one of the cytoprotective effects of prostaglandins (Pg)?
Vasodilation in the mucosa
Inhibition of mucus secretion
Reduction of bicarbonate production
Increase in gastric acid secretion
How long does the action of Misoprostol last after administration?
1 hour
3 hours
5 hours
7 hours
What percentage of Misoprostol binds to plasma proteins?
50%
60%
80%
90%
Diagram showing the effects and properties of Misoprostol.
Induction of labor and prevention of gastric ulcers
Treatment of hypertension
Management of diabetes
Relief of asthma symptoms
What is Misoprostol an analog of?
Alprostadil (PgE1)
Aspirin
Ibuprofen
Acetaminophen
What is one of the cytoprotective effects of prostaglandins (Pg)?
Vasodilation in the mucosa
Inhibition of mucus secretion
Increase in gastric acid secretion
Reduction of bicarbonate secretion
How long does the action of Misoprostol last when administered orally?
3 hours
1 hour
6 hours
12 hours
What percentage of Misoprostol binds to plasma proteins?
80%
50%
30%
10%
What is a potential gastrointestinal side effect of Misoprostol?
Headache
Abdominal pain
Skin rash
Hypertension
What effect does Misoprostol have on uterine contractility?
Decreases contractility
No effect
Increases contractility
Causes relaxation
What is a possible skin-related side effect of Misoprostol?
Dry skin
Eruptions
Bruising
Itching
What is the treatment dosage of Misoprostol for ulcer disease?
200 µg/day
400 µg/day
600 µg/day
800 µg/day
What is the prophylactic dosage of Misoprostol for ulcer disease?
100 µg/day
200 µg/day
300 µg/day
400 µg/day
