Nokea
What are the rhythmic contractions that propel food through the intestinal tract called?
- A. Segmentation
- B. Peristalsis
- C. Cardiospasm
- D. Pendular movements
Correct Answer: B
Rationale: Peristalsis is the correct answer because it refers to the rhythmic contractions that propel food through the intestinal tract by pushing it along the digestive system. Segmentation, on the other hand, refers to the mixing movements in the intestines rather than the forward movement of food. Cardiospasm is a condition characterized by difficulty swallowing due to the inability of the esophagus to relax, and pendular movements are a type of motility found in the small intestine but do not specifically refer to the propulsion of food.
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What is the primary function of protein in the body?
- A. Provide energy.
- B. Regulate metabolic processes.
- C. Control muscle contractions.
- D. Build tissue.
Correct Answer: D
Rationale: The primary function of protein in the body is to build and repair tissues. Proteins are crucial for growth, maintenance, and repair of body tissues, including muscles, organs, and skin. While proteins can be a source of energy, their primary role is not to supply energy. Regulating metabolic processes and controlling muscle contractions are functions typically attributed to other nutrients and compounds in the body, such as vitamins and minerals.
What is the main body storage form of carbohydrates?
- A. Glycogen.
- B. Starch.
- C. Fat.
- D. Glucose.
Correct Answer: A
Rationale: The correct answer is A: Glycogen. Glycogen is the stored form of carbohydrates in the body, primarily found in the liver and muscles. Starch (choice B) is a carbohydrate storage molecule in plants, not in the human body. Fat (choice C) is a different macronutrient and not the main storage form of carbohydrates. Glucose (choice D) is a simple sugar that serves as an energy source, not the main storage form of carbohydrates.
Which types of acids form the basic building blocks of protein?
- A. fatty
- B. amino
- C. nucleic
- D. omega fatty
Correct Answer: B
Rationale: The correct answer is 'B: amino.' Amino acids are the fundamental units that make up proteins. They are essential for various bodily functions, including building and repairing tissues. Choice A, 'fatty acids,' are not the basic building blocks of proteins but rather a type of lipid. Choice C, 'nucleic acids,' are the building blocks of nucleic acids like DNA and RNA, not proteins. Choice D, 'omega fatty acids,' are a specific type of fatty acid known for their health benefits but are not directly related to the building blocks of proteins.
What are the actions involved in the process of digestion?
- A. thermal and chemical.
- B. chemical and segmental.
- C. muscular and chemical.
- D. mechanical and thermal.
Correct Answer: C
Rationale: The correct answer is C: 'muscular and chemical.' In the process of digestion, muscular movements help in mixing and propelling food along the digestive tract, while chemical breakdowns involving enzymes and acids break down food into smaller molecules for absorption. Choices A, B, and D are incorrect as thermal, segmental, and mechanical actions are not the primary actions involved in the digestion process.
Which age group is particularly vulnerable to malnutrition?
- A. Infants
- B. Teenagers
- C. Young adults
- D. Middle-aged adults
Correct Answer: A
Rationale: Infants are particularly vulnerable to malnutrition due to their high growth rate and specific nutrient requirements. During the first year of life, infants experience rapid growth and development, requiring essential nutrients for proper physical and cognitive development. Teenagers, young adults, and middle-aged adults have more stable nutritional needs compared to infants, making them less vulnerable to malnutrition. Therefore, infants are the most susceptible age group when it comes to malnutrition.