Histology Practice Questions

Q: What is the epithelial lining of the glottis/ true vocal cords?

Stratified squamous non-keratinized. **Explanation:** The respiratory tract is predominantly lined by **pseudostratified ciliated columnar epithelium** (respiratory epithelium). However, areas subjected to significant mechanical stress or friction undergo a protective adaptation to **stratified squamous non-keratinized epithelium**. **1. Why Option A is correct:** The **true vocal cords (glottis)** are responsible for phonation. During speech and coughing, the vocal folds undergo high-frequency vibration and rapid contact (mechanical stress). To withstand this constant friction without damage, the epithelium transitions from respiratory type to stratified squamous non-keratinized epithelium. This provides a durable, multi-layered protective barrier. **2. Why other options are incorrect:** * **Option B (Keratinized):** Keratinization is a feature of the skin (epidermis) to prevent desiccation. Mucosal surfaces like the vocal cords remain moist and do not require a keratin layer. * **Options C & D (Columnar):** While ciliated columnar epithelium lines most of the larynx (supraglottis and subglottis), it is too fragile for the high-impact zone of the true vocal cords. **Clinical Pearls for NEET-PG:** * **The "Transition Zone":** The vocal cords are one of the few sites in the upper respiratory tract where this epithelial change occurs. Another high-yield site is the **epiglottis** (lingual surface and upper part of the laryngeal surface). * **Pathology Link:** Because the true vocal cords are lined by squamous epithelium, the most common malignancy of the larynx is **Squamous Cell Carcinoma (SCC)**. * **Reinke’s Space:** This is the potential space between the epithelium and the vocal ligament. Accumulation of fluid here leads to **Reinke’s edema**, commonly seen in smokers.

Q: Goblet cells are seen in which of the following ocular structures?

Conjunctiva. The **conjunctiva** is a thin, translucent mucous membrane that lines the inner surface of the eyelids and the anterior portion of the sclera [1]. Histologically, it consists of a non-keratinized stratified columnar (or squamous) epithelium containing interspersed **Goblet cells** [4]. These unicellular glands are responsible for secreting **mucin**, which forms the innermost layer of the precorneal tear film, ensuring the ocular surface remains lubricated and protected [3]. **Analysis of Options:** * **A. Cornea:** The corneal epithelium is a highly organized, non-keratinized stratified squamous epithelium [2]. It is devoid of goblet cells and blood vessels to maintain optical transparency. * **C. Retina:** The retina is a complex neurosensory tissue composed of ten layers of neurons and glial cells (e.g., photoreceptors, bipolar cells, ganglion cells) [5]. It does not contain glandular or epithelial goblet cells. * **D. All the above:** Incorrect, as goblet cells are specific to the conjunctival lining in the eye. **High-Yield Clinical Pearls for NEET-PG:** * **Bitot’s Spots:** In Vitamin A deficiency, the conjunctiva undergoes squamous metaplasia, leading to a loss of goblet cells and the formation of foamy keratinized patches (Bitot’s spots). * **Tear Film Layers:** Remember the mnemonic **M-A-L**: **M**ucin (Goblet cells), **A**queous (Lacrimal glands), and **L**ipid (Meibomian glands). * **Density:** Goblet cells are most densely concentrated in the **inferonasal quadrant** and the fornices of the conjunctiva.

Q: The splenic vein originates from which of the following structures?

Trabecular veins. **Explanation:** The splenic circulation follows a specific hierarchical flow. The **splenic vein** is formed by the union of several **trabecular veins**, which emerge from the splenic parenchyma. The venous drainage of the spleen begins at the **splenic sinusoids** (in the red pulp). These sinusoids drain into the **pulp veins**, which then coalesce to form **trabecular veins**. These veins travel within the connective tissue trabeculae and eventually exit the splenic hilum to form the splenic vein. The splenic vein then joins the superior mesenteric vein behind the neck of the pancreas to form the portal vein [2]. **Analysis of Incorrect Options:** * **A & B (Central and White Pulp Arteries):** These are part of the **arterial** supply. The splenic artery branches into trabecular arteries, which become central arteries as they are surrounded by the Periarteriolar Lymphoid Sheath (PALS) in the white pulp. * **C (Penicillar Arterioles):** These are the terminal branches of the central arteries located in the red pulp. They represent the arterial side of the circulation just before the blood enters the sinusoids (closed circulation) or the splenic cords (open circulation). **High-Yield Facts for NEET-PG:** * **Splenic Vein Landmarks:** It runs posterior to the body and tail of the pancreas [1]. Thrombosis of this vein can lead to **isolated gastric varices**. * **Open vs. Closed Circulation:** Humans primarily have "open circulation" where blood from penicillar arterioles empties into the splenic cords before entering sinusoids. * **Nutcracker Syndrome:** Compression of the left renal vein between the SMA and Aorta; however, the splenic vein is a key landmark located superior to this site.

Q: What type of epithelium lines the Schneiderian membrane?

Pseudostratified ciliated columnar epithelium.. ### Explanation The **Schneiderian membrane** is the anatomical term for the **nasal mucosa** (specifically the ectodermally derived schneiderian mucosa) that lines the nasal cavity and the paranasal sinuses. **1. Why the Correct Answer is Right:** The nasal cavity and paranasal sinuses are part of the upper respiratory tract. The characteristic lining of the respiratory tract is **Pseudostratified ciliated columnar epithelium** (often called "Respiratory Epithelium") [1]. This specialized tissue contains goblet cells that secrete mucus to trap particulate matter, while the cilia move the mucus toward the nasopharynx for clearance (mucociliary clearance) [1]. **2. Analysis of Incorrect Options:** * **A. Stratified squamous epithelium:** This is found in areas subject to mechanical stress or friction, such as the skin, oral cavity, and the **nasal vestibule** (the very entrance of the nose). * **C. Stratified columnar epithelium:** This is a rare type of epithelium found only in specific locations like the large ducts of salivary glands or parts of the male urethra. * **D. Stratified ciliated columnar epithelium:** This is not a standard histological classification in the human body; ciliated columnar cells are typically organized in a pseudostratified or simple arrangement. **3. Clinical Pearls for NEET-PG:** * **Schneiderian Papilloma:** A benign but locally aggressive tumor arising from this membrane, often associated with HPV [2]. * **Sinus Lift Procedure:** In dentistry/maxillofacial surgery, the Schneiderian membrane is elevated to add bone to the maxillary sinus for dental implants. * **Olfactory Epithelium:** While most of the nasal cavity is lined by respiratory epithelium, the roof (superior concha) is lined by **Olfactory Epithelium**, which contains bipolar sensory neurons [3].

Q: What is the type of epithelium lining the structures indicated by arrows in the provided diagram of the brain?

Columnar. ***Columnar*** - The **ependymal cells** lining the brain ventricles are **simple columnar epithelium** that facilitate **cerebrospinal fluid (CSF)** circulation. - These cells have **cilia** on their apical surface that help move CSF through the ventricular system. *Squamous* - **Simple squamous epithelium** lines the **meninges** (particularly the arachnoid and pia mater), not the ventricular system. - This thin epithelium is suited for **diffusion** and **filtration**, not CSF circulation like ependymal cells. *Cuboidal* - **Simple cuboidal epithelium** is found in the **choroid plexus** where it produces CSF, not lining the ventricles. - These cells are specialized for **secretion** and have different morphology than ependymal cells. *Transitional* - **Transitional epithelium** is found in the **urinary bladder** and **ureters**, allowing for stretching. - This epithelium is **stratified** and designed for **distension**, which is not needed in brain ventricles.

Q: Which region of the lymph node is T cell dependent?

Paracortical area. **Explanation:** The lymph node is anatomically divided into three main zones: the cortex, the paracortex, and the medulla. Each zone houses specific immune cell populations. **1. Why Paracortical Area is Correct:** The **paracortex** is the **T-cell dependent zone** of the lymph node. It is located between the outer cortex and the inner medulla. This region contains High Endothelial Venules (HEVs), through which T-cells enter from the blood. It also houses Dendritic Cells that present antigens to T-cells to initiate cell-mediated immune responses. In conditions like DiGeorge Syndrome (T-cell deficiency), this specific area is poorly developed. **2. Analysis of Incorrect Options:** * **Cortical follicles (Option A):** These are **B-cell dependent zones**. Primary follicles contain resting B-cells, while secondary follicles contain germinal centers where B-cells proliferate after antigenic stimulation. * **Medullary cords (Option B):** These are located in the innermost part of the node and primarily contain **plasma cells** (secreting antibodies), macrophages, and B-cells. * **Mantle layer (Option C):** This is the outer ring of a secondary follicle consisting of resting, small B-lymphocytes. It is a B-cell predominant region. **High-Yield Clinical Pearls for NEET-PG:** * **B-cell Zone:** Cortex (Follicles/Germinal Centers). * **T-cell Zone:** Paracortex. * **DiGeorge Syndrome:** Paracortex is hypocellular/depleted. * **Agammaglobulinemia (Bruton’s):** Germinal centers and follicles are absent or poorly developed. * **Lymph Node Drainage:** Afferent lymphatics → Subcapsular sinus → Cortical sinus → Medullary sinus → Efferent lymphatics.

Question 1

In the central nervous system (CNS), oligodendrocytes share a similar function with which of the following cell types?

Accepted Answer

Schwann cells

Answer

Gemistocytes

Answer

Astrocytes

Answer

Microglial cells

Question 2

What best defines vasa vasorum?

Accepted Answer

Small blood vessels supplying the walls of large blood vessels

Answer

Small blood vessels supplying nerves

Answer

Vessels accompanying arteries

Answer

Vessels accompanying nerves

Question 3

What is the epithelial lining of the glottis/ true vocal cords?

Accepted Answer

Stratified squamous non-keratinized

Answer

Stratified squamous keratinized

Answer

Ciliated columnar

Answer

Non-ciliated columnar

Question 4

Goblet cells are seen in which of the following ocular structures?

Accepted Answer

Conjunctiva

Answer

Cornea

Answer

Retina

Answer

All the above

Question 5

Which of the following is not a hyaline cartilage?

Accepted Answer

Meniscus

Answer

Auricular cartilage

Answer

Thyroid cartilage

Answer

Nasal septum

Question 6

The splenic vein originates from which of the following structures?

Accepted Answer

Trabecular veins

Answer

Central arteries

Answer

White pulp arteries

Answer

Penicillar arterioles

Question 7

All are true about liver histology except?

Accepted Answer

Hepatic lobule is the anatomical unit.

Answer

Portal space contains bile duct, portal vein, and hepatic artery.

Answer

Zone I is well oxygenated.

Answer

Central vein drains the lobule.

Question 8

What type of epithelium lines the Schneiderian membrane?

Accepted Answer

Pseudostratified ciliated columnar epithelium.

Answer

Stratified squamous epithelium.

Answer

Stratified columnar epithelium.

Answer

Stratified ciliated columnar epithelium.

Question 9

What is the type of epithelium lining the structures indicated by arrows in the provided diagram of the brain?

Accepted Answer

Columnar

Answer

Squamous

Answer

Cuboidal

Answer

Transitional

Question 10

Which region of the lymph node is T cell dependent?

Accepted Answer

Paracortical area

Answer

Cortical follicles of lymph node

Answer

Medullary cords

Answer

Mantle layer

Histology — MCQs

Histology — MCQs

On this page

Practice by Chapter

Want unlimited practice?