Which of the following is a characteristic of epithelial tissue?
tightly packed cells
extensive extracellular matrix
a rich blood supply
presence of lacunae
The Correct Answer is A
A. tightly packed cells: Epithelial tissue consists of cells that are closely packed together with minimal extracellular space, forming continuous sheets that cover surfaces or line cavities. This allows for effective protection, absorption, and secretion.
B. extensive extracellular matrix: This is characteristic of connective tissue, not epithelial tissue. Epithelial tissue has very little extracellular matrix.
C. a rich blood supply: Epithelial tissues are avascular, meaning they lack a direct blood supply. They receive nutrients via diffusion from underlying connective tissue.
D. presence of lacunae: Lacunae are small spaces that contain cells in cartilage or bone tissue, not epithelial tissue.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. hyaline cartilage: Hyaline cartilage contains fine collagen fibers, but not densely packed ones. It is more glassy and smooth, found in the nose, trachea, and at joint surfaces.
B. areolar cartilage: This is not a valid type of cartilage. “Areolar” refers to loose connective tissue, not cartilage.
C. fibrocartilage: This type of cartilage is rich in dense bundles of collagen, making it very tough and resistant to compression. It’s found in intervertebral discs and the pubic symphysis.
D. elastic cartilage: Elastic cartilage contains more elastic fibers than collagen, allowing flexibility. It is found in the ear and epiglottis.
Correct Answer is C
Explanation
A. edema
Edema involves fluid accumulation and can contribute to swelling and immune cell movement, but it does not directly wall off the injury site.
B. vasodilation of blood vessels
Vasodilation increases blood flow to bring immune cells and nutrients, but does not physically isolate the injury.
C. formation of a clot
A blood clot forms a physical barrier that helps prevent the spread of pathogens and walls off the injury.
D. all of the above
While A and B support inflammation and healing, only C directly achieves the goal of physically walling off the injured area. Therefore, "all of the above" is in
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.