ATI TEAS 7
Biology
1. What are the finger-like projections that increase the surface area for absorption in the small intestine called?
- A. Crypts of Lieberkühn
- B. Goblet cells
- C. Villi
- D. Paneth cells
Correct answer: C
Rationale: Rationale: A) Crypts of Lieberkühn are small pits in the lining of the small intestine that contain cells involved in the production of intestinal juices, but they do not increase the surface area for absorption. B) Goblet cells are specialized cells that secrete mucus to protect the lining of the digestive tract, but they do not increase the surface area for absorption. C) Villi are finger-like projections in the small intestine that increase the surface area available for nutrient absorption. Each villus contains blood vessels and lacteals (lymphatic vessels) that help absorb nutrients from digested food. D) Paneth cells are specialized cells found in the small intestine that secrete antimicrobial substances, but they do not increase the surface area for absorption.
2. Which of the following is NOT a function of the cardiovascular system?
- A. Transporting oxygen to cells
- B. Maintaining blood pressure
- C. Carrying waste products to the kidneys for removal
- D. Initiating the immune response
Correct answer: D
Rationale: The cardiovascular system is responsible for transporting oxygen to cells (option A), maintaining blood pressure (option B), and carrying waste products to the kidneys for removal (option C). However, initiating the immune response (option D) is not a function of the cardiovascular system. The immune response is primarily carried out by the immune system, which includes organs like the spleen and lymph nodes. While the cardiovascular system does play a role in immune function by transporting immune cells and antibodies, it is not responsible for initiating the immune response. Therefore, option D is the correct answer.
3. What happens to the wavelength of a wave when its frequency increases while the speed remains constant?
- A. Wavelength increases
- B. Wavelength decreases
- C. Wavelength remains the same
- D. Wavelength becomes zero
Correct answer: b
Rationale: When the frequency of a wave increases while the speed remains constant, the wavelength decreases.
4. What is the functional group present in amines?
- A. Hydroxyl
- B. Carbonyl
- C. Amine
- D. Nitro
Correct answer: C
Rationale: Amines have the functional group -NHâ‚‚. The other choices are associated with different functional groups.
5. Which property of a wave determines its pitch in sound waves?
- A. Amplitude
- B. Frequency
- C. Wavelength
- D. Speed
Correct answer: B
Rationale: The pitch of a sound wave is determined by its frequency. Frequency refers to the number of cycles of a wave that occur in a unit of time, usually measured in hertz (Hz). Higher frequencies correspond to higher pitches, while lower frequencies correspond to lower pitches. Amplitude refers to the height of a wave and is related to the loudness of the sound. Wavelength is the distance between two consecutive points in a wave that are in phase, and speed is the rate at which a wave travels through a medium.
6. The muscular tube connecting the mouth to the stomach is lined with a mucous membrane. What is the main function of this mucous membrane?
- A. Secretion of digestive enzymes
- B. Absorption of nutrients
- C. Lubrication and protection
- D. Storage of bile
Correct answer: C
Rationale: The correct answer is C: Lubrication and protection. The mucous membrane lining the esophagus serves to provide lubrication for food as it travels from the mouth to the stomach, making it easier to swallow. Additionally, the mucous membrane protects the esophageal tissue from damage caused by the passage of food and liquids. This function is crucial in preventing irritation and inflammation of the esophagus, ensuring smooth and efficient digestion process. The mucous membrane does not secrete digestive enzymes (A), absorb nutrients (B), or store bile (D), as those functions are carried out by other digestive organs.
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