Nursing Elites

1. Which of the following is NOT a function of progesterone in the female reproductive system?

• A. expression of secondary sexual characteristics, such as enlarged breasts
• B. stimulation of milk production in the breasts
• C. regulation and preparation of the endometrial lining of the uterus for potential pregnancy
• D. inhibition of contractions of the uterus as the ovum is released

Correct answer: A

Rationale: Progesterone plays a key role in the regulation and preparation of the endometrial lining of the uterus for potential pregnancy. It also inhibits contractions of the uterus as the ovum is released and stimulates milk production in the breasts. However, the expression of secondary sexual characteristics, such as enlarged breasts, is primarily influenced by estrogen, not progesterone. Therefore, choice A is the correct answer as it is not a function directly attributed to progesterone in the female reproductive system.

2. How does the acceleration of an object change if the force acting on it is doubled?

• A. Acceleration is halved
• B. Acceleration doubles
• C. Acceleration remains unchanged
• D. Acceleration quadruples

Correct answer: B

Rationale: According to Newton's second law of motion, acceleration is directly proportional to the force acting on an object. When the force acting on an object is doubled, the acceleration of the object will also double. This relationship is described by the formula F = ma, where F is the force applied, m is the mass of the object, and a is the acceleration. Therefore, an increase in force will result in a proportional increase in acceleration. Choice A is incorrect because acceleration does not halve but doubles when force doubles. Choice C is incorrect as acceleration changes in direct proportion to force. Choice D is incorrect as acceleration does not quadruple but doubles when force doubles.

3. Which type of orbital can hold a maximum of 10 electrons?

• A. s orbital
• B. p orbital
• C. d orbital
• D. f orbital

Correct answer: D

Rationale: The correct answer is the f orbital. Each f orbital can hold up to 2 electrons. Since there are 5 f orbitals, the total maximum number of electrons that can be accommodated in f orbitals is 10 (2 electrons per orbital x 5 orbitals = 10 electrons). Therefore, the f orbital can hold a maximum of 10 electrons. Choice A, s orbital, is incorrect because it can hold a maximum of 2 electrons. Choice B, p orbital, is incorrect because it can hold a maximum of 6 electrons (3 orbitals x 2 electrons per orbital = 6 electrons). Choice C, d orbital, is incorrect as it can hold a maximum of 10 electrons (5 orbitals x 2 electrons per orbital = 10 electrons), but the question asks for the type of orbital that can hold a maximum of 10 electrons, not the total number of electrons in d orbitals.

4. 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.

5. If an atom has 32 neutrons, 17 protons, and 19 electrons, what is its charge?

• A. Positive
• B. Negative
• C. Neutral
• D. Cannot be determined

Correct answer: A

Rationale: An atom's charge is determined by the difference between the number of protons and electrons. Since the atom has 17 protons and 19 electrons, the net charge is positive. The excess of two electrons compared to protons results in a positive charge. Choice B (Negative) is incorrect because the atom has more protons than electrons, leading to a positive charge. Choice C (Neutral) is incorrect because the atom has an imbalance between protons and electrons, resulting in a charge. Choice D (Cannot be determined) is incorrect as the charge can be determined based on the given information.

Similar Questions