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301. Which digestive disorder is characterized mainly by increased frequency of bowel movements and fluid loss?
ⓐ. Jaundice
ⓑ. Constipation
ⓒ. Diarrhoea
ⓓ. Indigestion
Correct Answer: Diarrhoea
Explanation: Diarrhoea is a condition in which bowel movements become more frequent and the stools are often loose or watery. Because excessive fluid leaves the body in this way, diarrhoea can lead to dehydration if it is severe or prolonged. This makes it more than just an inconvenience; it can disturb the body’s fluid balance. It is not the same as constipation, where bowel movement is difficult or delayed. It is also different from jaundice and indigestion, which have different causes and signs. The increased bowel frequency with fluid loss is the key feature of diarrhoea.
302. Constipation is most directly associated with:
ⓐ. frequent passage of watery stools
ⓑ. forceful emptying of the stomach
ⓒ. retention of faeces due to irregular bowel movement
ⓓ. yellow discoloration of the skin and eyes
Correct Answer: retention of faeces due to irregular bowel movement
Explanation: Constipation occurs when bowel movement becomes difficult, infrequent, or irregular, leading to retention of faeces in the digestive tract. The stool may become hard and difficult to pass because more water is absorbed from it while it remains in the intestine longer than normal. This is the opposite of diarrhoea, where the bowel contents move too quickly and remain watery. Constipation is therefore mainly a disorder of delayed passage of faecal matter. It is not related to jaundice or vomiting. The defining feature is abnormal retention due to irregular bowel movement.
303. Indigestion refers mainly to:
ⓐ. incomplete digestion leading to discomfort or a feeling of fullness
ⓑ. severe liver damage causing bile pigment deposition
ⓒ. absence of faeces in the large intestine
ⓓ. involuntary expulsion of intestinal contents from the anus
Correct Answer: incomplete digestion leading to discomfort or a feeling of fullness
Explanation: Indigestion is a general digestive discomfort often associated with incomplete digestion of food. A person may feel heaviness, uneasiness, bloating, or fullness after eating. This may result from overeating, unsuitable food, poor digestive activity, or temporary disturbance in enzyme secretion or gut function. It is not the same as vomiting or diarrhoea, which involve obvious expulsion of contents, nor is it the same as jaundice, which shows yellow discoloration. Indigestion is mainly a disorder of digestive inefficiency and discomfort. Its key idea is incomplete or disturbed digestion.
304. Which of the following correctly matches the disorder with its most characteristic sign?
ⓐ. Jaundice — watery stools
ⓑ. Constipation — yellow eyes
ⓒ. Vomiting — retention of faeces
ⓓ. Diarrhoea — repeated loose bowel movements
Correct Answer: Diarrhoea — repeated loose bowel movements
Explanation: Diarrhoea is classically identified by repeated loose or watery bowel movements. This match is correct and reflects the basic definition of the disorder. Jaundice is associated with yellowing of the skin and eyes, not watery stools. Constipation involves difficulty or delay in passing faeces, not yellow eyes. Vomiting is the expulsion of stomach contents through the mouth, not retention of faeces. This type of matching question is important because digestive disorders are often distinguished first by their most visible or common signs.
305. A disorder involving disturbance in bile pigment handling and yellowing of body tissues is:
ⓐ. indigestion
ⓑ. jaundice
ⓒ. constipation
ⓓ. vomiting
Correct Answer: jaundice
Explanation: Jaundice is the digestive disorder in which body tissues, especially the skin and sclera of the eyes, develop a yellow color because bile pigments accumulate in the body. This is usually related to a problem involving the liver or bile flow. The disorder therefore has a clear connection with the hepatobiliary system rather than with bowel movement or stomach emptying. Indigestion causes discomfort, constipation affects passage of faeces, and vomiting causes expulsion of stomach contents. None of these is defined by bile pigment accumulation. Thus, jaundice is the correct disorder here.
306. Which disorder may rapidly lead to dehydration if prolonged?
ⓐ. Diarrhoea
ⓑ. Jaundice
ⓒ. Indigestion
ⓓ. Constipation
Correct Answer: Diarrhoea
Explanation: Diarrhoea can quickly lead to dehydration because the body loses large amounts of water and often electrolytes through repeated loose stools. If the condition is severe or continues for a long time, this loss can become dangerous, especially in children and older adults. This is why diarrhoea is often treated with special attention to fluid replacement. Jaundice, indigestion, and constipation have their own health effects, but they are not chiefly defined by rapid fluid loss. The risk of dehydration is therefore a major concern in diarrhoea. This makes option A the correct answer.
307. Which pair of digestive disorders shows opposite trends in bowel movement?
ⓐ. Jaundice and vomiting
ⓑ. Vomiting and indigestion
ⓒ. Diarrhoea and constipation
ⓓ. Jaundice and indigestion
Correct Answer: Diarrhoea and constipation
Explanation: Diarrhoea and constipation are opposite in terms of bowel movement pattern. In diarrhoea, bowel movement becomes frequent and the stools are loose, often due to rapid passage through the intestine. In constipation, bowel movement becomes delayed or irregular and the faeces may be retained and hard. This contrast makes the pair especially useful for understanding digestive disorders involving intestinal motility and stool passage. Jaundice and indigestion do not form such a direct opposite pair. Therefore, diarrhoea and constipation are the correct contrasting disorders.
308. Which statement about digestive disorders is correct?
ⓐ. Vomiting is mainly a disorder of yellow pigment deposition in tissues
ⓑ. Indigestion is mainly a problem of incomplete digestion and digestive discomfort
ⓒ. Constipation is defined by repeated watery bowel movements
ⓓ. Jaundice is caused by rapid expulsion of stomach contents
Correct Answer: Indigestion is mainly a problem of incomplete digestion and digestive discomfort
Explanation: Indigestion is mainly characterized by discomfort, heaviness, or fullness resulting from incomplete or disturbed digestion. It may occur after overeating, eating unsuitable food, or when digestive activity is temporarily poor. The other statements incorrectly mix the basic features of different disorders. Vomiting involves expulsion of stomach contents, constipation involves retained or difficult bowel movement, and jaundice involves yellowing due to bile pigment accumulation. This question helps reinforce the need to distinguish digestive disorders by their defining signs. Therefore, the statement about indigestion is the correct one.
309. A child passes frequent watery stools for several hours and becomes unusually thirsty and weak. Which digestive disorder best fits this condition?
ⓐ. Constipation
ⓑ. Jaundice
ⓒ. Indigestion
ⓓ. Diarrhoea
Correct Answer: Diarrhoea
Explanation: Diarrhoea is characterized by repeated loose or watery bowel movements, and one of its most important consequences is loss of body water. When this continues for hours, the person may become thirsty, weak, and dehydrated. This scenario-based question focuses on applying the concept rather than only recalling the name of the disorder. Constipation shows the opposite bowel pattern, jaundice mainly shows yellow discoloration, and indigestion mainly causes discomfort after eating. Therefore, the condition described most clearly matches diarrhoea. The water loss is the clue that makes the identification stronger.
310. Which statement correctly compares vomiting and diarrhoea?
ⓐ. Vomiting causes yellowing of the skin, whereas diarrhoea causes retention of faeces
ⓑ. Vomiting expels stomach contents through the mouth, whereas diarrhoea increases the passage of loose stools
ⓒ. Vomiting and diarrhoea are both disorders of bile pigment accumulation
ⓓ. Vomiting affects only the large intestine, whereas diarrhoea affects only the liver
Correct Answer: Vomiting expels stomach contents through the mouth, whereas diarrhoea increases the passage of loose stools
Explanation: Vomiting and diarrhoea are different disorders even though both may cause fluid loss. Vomiting involves reverse expulsion of stomach contents through the mouth, while diarrhoea involves frequent loose or watery bowel movements through the intestinal route. This comparison helps distinguish the route and nature of content loss in the two conditions. They are not disorders of bile pigment accumulation, and they do not affect only one isolated digestive organ in the way described by the wrong options. Understanding this difference is important for correct identification of digestive disorders. So option B gives the best comparison.
311. Assertion: Jaundice is commonly recognized by yellow discoloration of the skin and eyes.
Reason: Bile pigments accumulate in the body when liver function or bile flow is disturbed.
ⓐ. Both Assertion and Reason are true, and the Reason correctly explains the Assertion
ⓑ. Both Assertion and Reason are true, but the Reason does not explain the Assertion
ⓒ. Assertion is true, but the Reason is false
ⓓ. Assertion is false, but the Reason is true
Correct Answer: Both Assertion and Reason are true, and the Reason correctly explains the Assertion
Explanation: Jaundice is identified clinically by yellowing of the skin, mucous membranes, and the white part of the eyes. This discoloration happens because bile pigments, especially bilirubin, accumulate in the body when the liver is unable to process them properly or when bile flow is obstructed. The reason therefore directly explains the visible sign given in the assertion. This is an important cause-and-effect relationship in digestive disorders. It also helps students understand why jaundice is linked more strongly with liver and bile problems than with bowel movement or stomach irritation. Therefore, both the assertion and reason are true and properly connected.
312. A person eats an unusually heavy meal and later feels abdominal heaviness, fullness, and discomfort without yellowing of eyes or repeated loose stools. The most likely condition is:
ⓐ. diarrhoea
ⓑ. jaundice
ⓒ. constipation
ⓓ. indigestion
Correct Answer: indigestion
Explanation: Indigestion is mainly associated with a feeling of heaviness, fullness, uneasiness, or discomfort after eating, especially after overeating or eating unsuitable food. In this scenario, there is no yellowing of the eyes to suggest jaundice and no repeated watery stools to suggest diarrhoea. Constipation would be identified more by delayed or difficult bowel movement than by immediate post-meal discomfort alone. The question is designed to test recognition of a realistic everyday presentation of indigestion. It shows how symptoms can guide identification even when the disorder is mild. Therefore, the most likely condition is indigestion.
313. A student says, “Constipation means that faeces are not formed in the intestine.” Which statement best corrects this misconception?
ⓐ. Constipation means the stomach forcefully ejects its contents before faeces form
ⓑ. Constipation means faeces may be retained and become difficult to pass because bowel movement is delayed or irregular
ⓒ. Constipation means bile pigments collect in the body and stop intestinal movement
ⓓ. Constipation means loose stools pass too rapidly through the intestine
Correct Answer: Constipation means faeces may be retained and become difficult to pass because bowel movement is delayed or irregular
Explanation: Constipation does not mean that faeces fail to form. Instead, it means that bowel movement is delayed, infrequent, or difficult, so the faeces are retained longer than normal in the intestine. During this extra time, more water may be absorbed, making the stool harder and more difficult to pass. This question corrects a common misunderstanding by explaining the actual basis of constipation. It is therefore a disorder of delayed passage, not absence of waste formation. The correct statement is the one describing retention and difficulty in passage.
314. Which disorder is most directly linked with slower movement and prolonged retention of intestinal contents?
ⓐ. Diarrhoea
ⓑ. Vomiting
ⓒ. Constipation
ⓓ. Jaundice
Correct Answer: Constipation
Explanation: Constipation is associated with delayed or irregular bowel movement, meaning the intestinal contents remain longer in the lower digestive tract before being expelled. This longer retention often leads to harder stools because additional water is absorbed from the retained material. Diarrhoea shows the opposite trend, with rapid passage of loose stools. Vomiting mainly involves stomach contents moving upward through the mouth, and jaundice is related to bile pigment handling rather than bowel transit speed. This question focuses on intestinal movement as the distinguishing clue. Therefore, constipation is the disorder most directly linked to prolonged retention.
315. Which of the following is not a characteristic feature of jaundice?
ⓐ. Yellowish discoloration of eyes
ⓑ. Disturbance related to bile pigments
ⓒ. Strong association with liver function
ⓓ. Frequent loose watery stools as the main sign
Correct Answer: Frequent loose watery stools as the main sign
Explanation: Jaundice is mainly characterized by yellow discoloration of the skin and eyes due to accumulation of bile pigments. It is commonly associated with disorders of the liver or bile flow. Frequent loose watery stools, however, are the main sign of diarrhoea, not jaundice. This question is a non-example type item that tests whether the student can separate overlapping digestive disorders clearly. It is especially useful because many digestive conditions affect the abdomen but have very different hallmark signs. Therefore, watery stools as the main sign do not belong to jaundice.
316. A person loses stomach contents through the mouth after irritation of the upper digestive tract. Which disorder is this an example of?
ⓐ. Vomiting
ⓑ. Indigestion
ⓒ. Constipation
ⓓ. Jaundice
Correct Answer: Vomiting
Explanation: Vomiting is the abnormal expulsion of stomach contents through the mouth. It usually involves irritation, reflex action, or disturbance affecting the upper digestive tract or related control mechanisms. This makes it different from indigestion, which mainly causes discomfort without forceful expulsion. It is also different from constipation, which involves bowel movement difficulty, and jaundice, which is recognized by yellow discoloration due to bile pigment accumulation. The scenario directly describes the route and source of expelled material. Therefore, the disorder is vomiting.
317. Which pair correctly matches one disorder of rapid intestinal emptying with one disorder of delayed intestinal emptying?
ⓐ. Vomiting and jaundice
ⓑ. Diarrhoea and constipation
ⓒ. Indigestion and vomiting
ⓓ. Jaundice and diarrhoea
Correct Answer: Diarrhoea and constipation
Explanation: Diarrhoea involves rapid passage of bowel contents, often producing frequent loose stools, while constipation involves delayed and difficult passage of faeces. These two disorders therefore represent opposite trends in intestinal emptying. This comparison-based question is stronger than simple definition recall because it asks the student to think in terms of functional movement in the intestine. Vomiting mainly concerns the stomach, and jaundice concerns bile pigment accumulation, so neither forms this contrast. The correct pair must show opposite bowel movement patterns. Therefore, diarrhoea and constipation are the best match.
318. Human dentition is called thecodont because the teeth are:
ⓐ. replaced twice during life
ⓑ. of different shapes and functions
ⓒ. fixed in bony sockets of the jaws
ⓓ. present in equal numbers in both jaws
Correct Answer: fixed in bony sockets of the jaws
Explanation: The term thecodont refers to the condition in which teeth are embedded in bony sockets of the upper and lower jaws. This feature gives firm attachment and support to the teeth during biting and chewing. It is different from heterodont, which describes different types of teeth, and diphyodont, which describes two successive sets of teeth in life. The question is important because these three terms are often confused. Human beings show all three features, but thecodont specifically refers to socketed teeth.
319. Which dental formula correctly represents the complete temporary dentition of a human child?
ⓐ. $\frac{2123}{2123}$
ⓑ. $\frac{2102}{2102}$
ⓒ. $\frac{2132}{2132}$
ⓓ. $\frac{2023}{2023}$
Correct Answer: $\frac{2102}{2102}$
Explanation: The temporary or milk dentition of a human child is represented by the dental formula $\frac{2102}{2102}$. This means that in one half of each jaw there are 2 incisors, 1 canine, 0 premolars, and 2 molars. The absence of premolars is an important feature of milk dentition. This formula differs from the permanent dental formula, which includes premolars and a greater total number of teeth. Knowing the temporary formula helps distinguish childhood dentition from adult dentition clearly.
320. Which dietary carbohydrate normally remains undigested in humans because the required enzyme is absent?
ⓐ. Starch
ⓑ. Sucrose
ⓒ. Lactose
ⓓ. Cellulose
Correct Answer: Cellulose
Explanation: Humans do not produce cellulase, the enzyme needed to digest cellulose. As a result, cellulose is not chemically digested in the human alimentary canal in the same way as starch, sucrose, or lactose. This makes cellulose an important exception in the study of carbohydrate digestion. It may still have dietary importance as roughage, but it is not converted into absorbable sugars by human digestive enzymes. The question is useful because it checks whether the student can identify a non-digestible carbohydrate despite knowing that many other carbohydrates are digested.