ATI TEAS 7
Chemistry
1. What is the common name for the organic compound CH₃OH?
- A. Methane
- B. Ethanol
- C. Methanol
- D. Butanol
Correct answer: C
Rationale: CH₃OH is commonly known as methanol. The other choices represent different organic compounds.
2. Based on the passage, the author's attitude towards online learning is likely to be
- A. Skeptical and critical, focusing solely on its limitations and negative impacts.
- B. Enthusiastic and optimistic, overlooking any potential issues and promoting its universal adoption.
- C. Cautiously pragmatic, recognizing its valuable potential while advocating for addressing its downsides.
- D. Indifferent and neutral, lacking any strong opinion on its role in education.
Correct answer: C
Rationale: The emphasis on both benefits and challenges suggests a balanced and pragmatic perspective, aligning with C.
3. A new material is claimed to be stronger than steel. You design an experiment to test this claim. What is the MOST important control variable?
- A. The size of the material samples.
- B. The temperature at which the test is conducted.
- C. The force applied to the material.
- D. The color of the material.
Correct answer: A
Rationale: The size of the material samples is the most important control variable because it ensures that the comparison between the new material and steel is fair and accurate. By keeping the size consistent, any differences in strength can be attributed to the material composition rather than variations in sample size. Controlling for size helps eliminate confounding variables and increases the reliability of the experiment results. Temperature, force applied, and color are not as critical for directly testing the strength comparison between the new material and steel.
4. Which division of the nervous system is responsible for the "fight or flight" response, preparing the body to respond to stressful situations?
- A. Somatic nervous system
- B. Autonomic nervous system
- C. Peripheral nervous system
- D. Central nervous system
Correct answer: b
Rationale: The correct answer is B: Autonomic nervous system. The autonomic nervous system controls involuntary bodily functions, including the 'fight or flight' response. This response is crucial for survival, triggering the body to prepare for action in stressful situations by increasing heart rate, dilating pupils, and releasing adrenaline. The somatic nervous system (A) controls voluntary movements, the peripheral nervous system (C) connects the central nervous system to the rest of the body, and the central nervous system (D) consists of the brain and spinal cord, overseeing all bodily functions but not directly involved in the 'fight or flight' response.
5. The primary site for nutrient absorption from digested food in the human digestive system is the:
- A. Esophagus
- B. Large intestine
- C. Small intestine
- D. Stomach
Correct answer: C
Rationale: The correct answer is C: Small intestine. The small intestine is the primary site for nutrient absorption in the human digestive system. It is in the small intestine where the majority of nutrients, such as carbohydrates, proteins, and fats, are broken down further and absorbed into the bloodstream to be utilized by the body. The large surface area of the small intestine, lined with villi and microvilli, facilitates efficient absorption of nutrients. The esophagus is responsible for transporting food from the mouth to the stomach, the stomach aids in digestion, and the large intestine primarily absorbs water and electrolytes, not nutrients.
6. Which division of the nervous system is responsible for involuntary functions such as heart rate, digestion, and respiratory rate?
- A. Somatic nervous system
- B. Autonomic nervous system
- C. Peripheral nervous system
- D. Central nervous system
Correct answer: b
Rationale: The correct answer is B: Autonomic nervous system. The autonomic nervous system is responsible for regulating involuntary functions in the body, such as heart rate, digestion, respiratory rate, and other automatic processes. The somatic nervous system (A) controls voluntary muscle movements, the peripheral nervous system (C) consists of nerves outside the brain and spinal cord, and the central nervous system (D) includes the brain and spinal cord. Understanding the functions and divisions of the nervous system is crucial for grasping how different bodily processes are controlled and regulated.
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