Nursing Elites

1. What is a contraceptive method that uses hormones to prevent ovulation?

• A. Spermicide
• B. Barrier method (condom, diaphragm)
• C. Combined oral contraceptive pill
• D. Intrauterine device (IUD)

Correct answer: C

Rationale: The correct answer is the Combined oral contraceptive pill (C). This method contains hormones (estrogen and progestin) that prevent ovulation, making it an effective contraceptive. Spermicide (A) is a substance that kills sperm and does not use hormones to prevent ovulation. Barrier methods (B) like condoms and diaphragms physically block sperm but do not involve hormone-induced prevention of ovulation. Intrauterine devices (IUDs) (D) prevent pregnancy through different mechanisms, such as altering the uterine environment and preventing sperm from fertilizing the egg, not by hormone-induced prevention of ovulation.

2. Adipose tissue, also known as fat, serves multiple functions. Which of these is NOT a function of adipose tissue?

• A. Insulation
• B. Energy storage
• C. Hormone production
• D. Muscle movement

Correct answer: D

Rationale: Adipose tissue serves multiple functions in the body, including insulation to regulate body temperature, energy storage in the form of triglycerides, and hormone production such as leptin and adiponectin. Adipose tissue does not directly participate in muscle movement. Muscle movement is primarily carried out by skeletal muscle tissue, which is responsible for voluntary movements and locomotion. Therefore, the correct answer is D, as adipose tissue is not involved in muscle movement.

3. Which of the following factors does NOT affect the rate of dissolution of a solute in a solvent?

• A. Temperature
• B. Pressure
• C. Surface area
• D. Particle size

Correct answer: B

Rationale: Pressure does not affect the rate of dissolution of a solute in a solvent. The factors that affect the rate of dissolution include temperature, surface area, and particle size. Temperature generally increases the rate of dissolution by providing more energy for the solute particles to break apart and mix with the solvent. Increasing the surface area of the solute by grinding it into smaller particles or increasing its contact area with the solvent can also speed up dissolution. Similarly, reducing the particle size of the solute can increase the rate of dissolution by providing more surface area for interaction with the solvent. Pressure, however, does not have a significant impact on the dissolution process and is not a factor that influences the rate at which a solute dissolves in a solvent.

4. Which part of the brain is responsible for memory and learning?

• A. Cerebellum
• B. Cerebrum
• C. Medulla oblongata
• D. Brainstem

Correct answer: B

Rationale: The correct answer is B - Cerebrum. The cerebrum, not the cerebellum as in choice A, is the largest part of the brain and is responsible for memory, learning, and higher cognitive functions. It processes sensory information, enables reasoning, and decision-making, all crucial for memory formation and learning processes. Choices C and D, Medulla oblongata and Brainstem respectively, do not primarily play roles in memory and learning processes. The Medulla oblongata is mainly involved in regulating vital autonomic functions like breathing and heart rate, while the Brainstem serves as a pathway for neural communication and houses essential control centers for basic life functions, not memory and learning.

5. What term describes the bouncing back of waves after striking a surface or boundary?

• A. Diffraction
• B. Refraction
• C. Reflection
• D. Interference

Correct answer: C

Rationale: The correct answer is 'Reflection.' Reflection is the term used to describe the bouncing back of waves after striking a surface or boundary. Diffraction, on the other hand, refers to the bending of waves around obstacles. Refraction is the bending of waves as they pass from one medium to another. Interference involves the combination of two or more waves that results in a new wave pattern. Therefore, in this context, choices A, B, and D are incorrect as they do not specifically relate to the bouncing back of waves after striking a surface or boundary.

Similar Questions