Question

Which of the following statements supports the claim that the stomach carries out its activities as a result of the integrated activity of its tissues? Choose 1 answer: Choose 1 answer: (Choice A) A During digestion, the stomach’s glandular epithelial tissues secrete digestive juices while the smooth muscle tissue produces contractions to churn the contents. (Choice B) B The stomach contains smooth muscle tissue which is made up of smooth muscle cells, and epithelial tissue which includes columnar epithelial cells. (Choice C) C Parietal cells in the stomach lining secrete hydrochloric acid, and this function helps the organism digest food.

Answer 1

C is the answer

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Answer 2

All living organisms require nutrients to survive.

Explanation:

• While plants can obtain nutrients from their roots and the energy molecules needed for cellular function through the process of photosynthesis, animals can obtain their nutrients from the consumption of other organisms.

• At the cellular level, the biological molecules essential for animal function are amino acids, lipid molecules, nucleotides, and simple sugars. However, the food consumed consists of proteins, fats and complex carbohydrates.

• Animals must convert these macromolecules into simpler molecules needed to maintain cellular function.The conversion of consumed food to essential nutrients is a multi-step process involving digestion and absorption.

• During digestion, food particles are broken down into smaller components, which are then absorbed by the body. This occurs by both physical means, such as chewing, and chemically.

• One of the challenges in human nutrition is maintaining a balance between food intake, storage and energy expenditure. Taking in more than the food energy used in the activity leads to the storage of the excess as fat deposits.

• The increase in obesity and the resulting diseases such as type 2 diabetes make the role of diet and nutrition in maintaining good health all the more important.