TEAS 7 science study guide free

TEAS 7 science study guide free Related

Review TEAS 7 science study guide free related questions and content

Which of the following is NOT a recommended method for preventing healthcare-associated infections (HAIs)?

  • A. Handwashing with soap and water
  • B. Proper use of personal protective equipment (PPE)
  • C. Disinfecting and reusing sterile medical devices
  • D. Using single-use sterile medical devices
Correct Answer: C

Rationale: Disinfecting and reusing sterile medical devices is not a recommended method for preventing healthcare-associated infections (HAIs). Reusing sterile medical devices can increase the risk of infections due to inadequate sterilization or potential damage to the devices during the reprocessing process. Proper sterilization and disposal of single-use medical devices are essential in preventing the transmission of infections in healthcare settings.

A) Handwashing with soap and water is a crucial method for preventing HAIs as it helps to remove and reduce the number of pathogens on the hands of healthcare workers, preventing the spread of infections.

B) Proper use of personal protective equipment (PPE) such as gloves, gowns, masks, and eye protection is important in preventing the transmission of infections between patients and healthcare workers.

C) Disinfecting and reusing sterile medical devices is not a recommended practice as it can lead to the transmission of infections if the devices are not adequately sterilized. Using single-use sterile medical devices helps to ensure that each patient receives a sterile device, reducing the risk of infections.

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Which neurotransmitter is associated with pleasure, reward, and motivation, and is often implicated in conditions such as addiction?

  • A. Acetylcholine
  • B. Dopamine
  • C. Serotonin
  • D. GABA (Gamma-aminobutyric acid)
Correct Answer: B

Rationale: Dopamine is the neurotransmitter associated with pleasure, reward, and motivation. It plays a crucial role in the brain's reward system and is often implicated in conditions such as addiction. Acetylcholine is involved in muscle movement and memory, serotonin is linked to mood regulation, and GABA is an inhibitory neurotransmitter that helps reduce neuronal excitability. Therefore, the correct answer is dopamine as it aligns with the neurotransmitter functions related to pleasure, reward, and motivation, distinct from the roles of acetylcholine, serotonin, and GABA.

What is the difference between emphysema and chronic bronchitis, both chronic obstructive pulmonary diseases (COPD)?

  • A. Emphysema damages alveoli, while chronic bronchitis inflames airways.
  • B. Emphysema causes coughing, while chronic bronchitis leads to shortness of breath.
  • C. Emphysema is more reversible than chronic bronchitis.
  • D. Emphysema affects only smokers, while chronic bronchitis can occur in non-smokers.
Correct Answer: A

Rationale: Emphysema is characterized by the destruction of alveoli in the lungs, leading to decreased surface area for gas exchange. Chronic bronchitis, on the other hand, involves inflammation and narrowing of the airways, leading to excessive mucus production and coughing. Therefore, the correct difference between emphysema and chronic bronchitis is that emphysema damages the alveoli, while chronic bronchitis inflames the airways. Choice B is incorrect because chronic bronchitis is associated with coughing, not emphysema. Choice C is incorrect as chronic bronchitis is typically less reversible compared to emphysema. Choice D is incorrect as both emphysema and chronic bronchitis are commonly seen in smokers, but chronic bronchitis can also occur in non-smokers due to other factors such as air pollution or genetic predisposition.

Which lifestyle practice can benefit the lymphatic system?

  • A. Consuming a high-sugar diet
  • B. Maintaining a sedentary lifestyle
  • C. Regularly engaging in moderate exercise
  • D. Smoking cigarettes
Correct Answer: C

Rationale: Regularly engaging in moderate exercise benefits the lymphatic system by promoting circulation and aiding in the removal of toxins and waste products from the body. This helps maintain a healthy lymphatic system. Consuming a high-sugar diet can lead to inflammation and hinder lymphatic function. Maintaining a sedentary lifestyle can result in poor circulation, which negatively affects the lymphatic system. Smoking cigarettes introduces toxins into the body, further burdening the lymphatic system. Therefore, the correct lifestyle practice that can benefit the lymphatic system is regularly engaging in moderate exercise.

The process by which a single-celled organism divides into two identical daughter cells is called

  • A. Conjugation
  • B. Binary fission
  • C. Endocytosis
  • D. Mitosis
Correct Answer: B

Rationale: Rationale:
A) Conjugation is a process in which genetic material is transferred between two bacterial cells through a conjugation tube. It does not involve the division of a single-celled organism into two identical daughter cells.
B) Binary fission is the process by which a single-celled organism, such as a bacterium, divides into two identical daughter cells. This is a common method of reproduction in prokaryotic organisms.
C) Endocytosis is a cellular process in which cells engulf external materials by wrapping them in a vesicle. It is not a method of cell division.
D) Mitosis is a type of cell division that occurs in eukaryotic cells, leading to the production of two daughter cells with identical genetic material. However, the question specifically refers to a single-celled organism, which typically undergoes binary fission for reproduction.

What is the process of converting glucose into ATP, the cell's primary energy currency, called?

  • A. Cellular respiration
  • B. Fermentation
  • C. Photosynthesis
  • D. Hydrolysis
Correct Answer: A

Rationale: A) Cellular respiration is the correct answer. It is the process by which cells convert glucose into ATP, the primary energy currency of the cell. This process involves a series of biochemical reactions that occur in the mitochondria of eukaryotic cells or the cytoplasm of prokaryotic cells. Through cellular respiration, the energy stored in glucose molecules is gradually released and captured in the form of ATP.

B) Fermentation is an anaerobic process that occurs in the absence of oxygen. It involves the partial breakdown of glucose to produce ATP and end products such as lactic acid or ethanol. While fermentation can generate ATP, it is less efficient than cellular respiration in terms of energy production.

C) Photosynthesis is the process by which plants, algae, and some bacteria convert light energy into chemical energy in the form of glucose. This process occurs in chloroplasts and is the opposite of cellular respiration. While photosynthesis produces glucose, it is not the process of converting glucose into ATP.

D) Hydrolysis is a chemical process that uses water to break down molecules into smaller components. It is not specifically related to converting glucose into ATP.

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