ATI TEAS 7
Biology
1. Aseptic meningitis is an inflammation of the meninges caused by:
- A. Bacteria
 - B. Viruses
 - C. Fungi
 - D. Parasites
 
Correct answer: B
Rationale: Rationale: Aseptic meningitis is typically caused by viral infections, such as enteroviruses (e.g., coxsackievirus, echovirus), herpes simplex virus, varicella-zoster virus, and others. These viruses can infect the meninges, leading to inflammation and symptoms of meningitis without the presence of bacteria. While bacterial meningitis is a serious and life-threatening condition, aseptic meningitis caused by viruses is usually less severe and has a better prognosis. Fungi and parasites are less common causes of meningitis compared to bacteria and viruses.
2. Which part of the brain is responsible for coordinating various sensory inputs, regulating sleep, and maintaining wakefulness?
- A. Cerebrum
 - B. Hypothalamus
 - C. Medulla oblongata
 - D. Reticular formation
 
Correct answer: d
Rationale: The correct answer is D: Reticular formation. The reticular formation is a network of neurons located in the brainstem that plays a crucial role in regulating consciousness, arousal, and sleep-wake transitions. It receives sensory inputs from various parts of the body and helps coordinate these inputs to maintain wakefulness and alertness. While the cerebrum is responsible for higher cognitive functions and the hypothalamus regulates various physiological processes like body temperature and hunger, the reticular formation specifically focuses on integrating sensory information and controlling wakefulness.
3. An object is thrown at an angle. Which of the following forces acts HORIZONTALLY on the object during its flight?
- A. Gravitational force
 - B. Normal force from the ground
 - C. Air resistance
 - D. The force of throwing
 
Correct answer: C
Rationale: Gravitational force acts downwards, normal force is perpendicular to motion at the launch point, and the throwing force is gone after release. Only air resistance acts continuously to oppose horizontal motion.
4. How does friction affect motion?
- A. Friction increases speed
 - B. Friction decreases speed
 - C. Friction has no impact on speed
 - D. Friction causes objects to float
 
Correct answer: b
Rationale: Friction opposes motion, leading to a decrease in speed or hindering movement.
5. What are chromosomes made of?
- A. DNA and RNA
 - B. DNA and proteins
 - C. Proteins and carbohydrates
 - D. DNA only
 
Correct answer: B
Rationale: Rationale: Chromosomes are structures found in the nucleus of cells that contain genetic material. They are made up of DNA (deoxyribonucleic acid), which carries the genetic information, and proteins that help in the organization and packaging of the DNA. While RNA is involved in various cellular processes, it is not a major component of chromosomes. Carbohydrates are not a significant component of chromosomes. Therefore, the most accurate answer is B) DNA and proteins.
6. Acids are generally characterized by a sour taste and the ability to:
- A. Turn litmus paper blue
 - B. Conduct electricity in solution
 - C. Neutralize bases
 - D. React explosively with metals
 
Correct answer: B
Rationale: Acids release hydrogen ions (H+) in solution, allowing electrical conductivity
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