Nursing Elites

1. What is the main function of the lymphatic system?

• A. To transport oxygen
• B. To produce hormones
• C. To fight infections
• D. To transport nutrients

Correct answer: C

Rationale: The main function of the lymphatic system is to fight infections. It achieves this by filtering lymph, returning excess tissue fluid to the bloodstream, and aiding in the body's immune response. The lymphatic system is crucial in protecting the body against pathogens and maintaining overall health. Choices A, B, and D are incorrect because transporting oxygen, producing hormones, and transporting nutrients are functions performed by other systems in the body, like the respiratory, endocrine, and circulatory systems, respectively.

2. How do the muscular and skeletal systems collaborate to facilitate movement?

• A. Muscles attached to tendons contract to bend the skeleton at the joints.
• B. The hard bones of the skeleton protect the voluntary muscles of the limbs.
• C. The cardiac muscles produce calcium that is needed for sturdy bones.
• D. Smooth muscles on internal organs leach excess minerals from the bones.

Correct answer: A

Rationale: The muscular system and the skeletal system collaborate to facilitate movement. Muscles are connected to bones through tendons and contract to generate movement at the joints. When muscles contract, they exert force on the bones, resulting in actions like bending the arm or leg. This coordinated effort between muscles and bones is crucial for various activities such as walking, running, and grasping objects. Choices B, C, and D are incorrect because they do not accurately describe the interaction between the muscular and skeletal systems. The skeletal system's primary role is to provide structural support and protect internal organs, while cardiac muscles are responsible for heart function and not bone strength. Smooth muscles are found in internal organs and are not involved in leaching excess minerals from bones.

3. How might an injury to the parietal lobe impact an individual?

• A. Breathing
• B. Attention
• C. Memory
• D. Perception

Correct answer: D

Rationale: An injury to the parietal lobe can impact an individual's perception, affecting their ability to interpret sensory information such as touch, spatial orientation, and recognizing objects. The parietal lobe is crucial for integrating sensory information and creating a coherent perception of the surrounding world. Damage to this area can lead to challenges with spatial awareness, object recognition, and accurate processing of sensory input. Choices A, B, and C are incorrect because breathing, attention, and memory are primarily associated with other brain regions such as the brainstem, frontal lobe, and temporal lobe respectively, not the parietal lobe.

4. Which cellular structure is responsible for producing energy?

• A. Nucleus
• B. Mitochondria
• C. Ribosome
• D. Golgi apparatus

Correct answer: B

Rationale: Mitochondria are the organelles responsible for producing energy in the cell through a process called cellular respiration. They are often referred to as the powerhouses of the cell due to their role in generating ATP, the cell's energy currency. The nucleus is not involved in energy production but houses the cell's genetic material. Ribosomes are responsible for protein synthesis, not energy production. The Golgi apparatus is involved in processing and packaging proteins for secretion, not energy production.

5. What is the name of the outermost layer of the skin?

• A. dermis
• B. epidermis
• C. subcutaneous tissue
• D. hypodermis

Correct answer: B

Rationale: The epidermis is the correct answer as it is the outermost layer of the skin. It acts as a protective barrier against environmental factors and helps in regulating moisture balance. The epidermis is also where new skin cells are continuously formed and contains melanocytes responsible for skin pigmentation. Choices A, C, and D are incorrect. The dermis is the layer beneath the epidermis, the subcutaneous tissue is the deepest layer of the skin, and the hypodermis lies below the dermis.

Similar Questions