Histology Slides for the USMLE: Exam Questions and Preparation
How Histology Slides are tested on the USMLE, the findings to know, a preparation approach and original practice questions with explained answers.
Histology slide questions ask you to name a normal tissue or cell from a micrograph. A small set of features identifies most tissues, and the same features are used when a slide is described in words.
Image-based questions appear on every Step: an ECG tracing, a radiograph, a photograph of the skin, a view of the retina, or a microscopic slide. The skill is the same each time: describe what you see in a fixed order, name the finding, then use it to answer the clinical question. This site does not host exam images, so each finding below is described in words, as many exam stems also do. Practice with an image-rich question bank and the official USMLE sample items to build your pattern recognition. The practice questions here are original and are not real exam items.
How Histology Slides is tested
A stem shows or describes a section and asks which tissue, organ segment or cell type it is, and sometimes what function or disease follows.
High-yield topics
- Epithelia: shape, layers and surface specializations
- Muscle: skeletal, cardiac and smooth muscle, and how to tell them apart
- Connective tissue, cartilage and bone
- The layers and segment-specific features of the gastrointestinal tract
- Liver, pancreas, kidney, thyroid and lung architecture
- Blood cells and lymphoid tissue
Preparation approach
- Learn a short list of distinguishing features for each tissue and organ.
- Work from low to high magnification, describing architecture before cells.
- Test yourself with unlabeled slides, then check against an atlas.
- Connect each structure to its function to make features easier to remember.
Practice questions
Question 1
A slide shows branching striated muscle cells with a single central nucleus and dark-staining intercalated discs. Which tissue is this?
- A. Skeletal muscle
- B. Smooth muscle
- C. Cardiac muscle
- D. Dense regular connective tissue
- E. Nervous tissue
Answer: C. Branching striated cells with central nuclei and intercalated discs are cardiac muscle. Skeletal muscle has multiple peripheral nuclei, and smooth muscle is not striated.
Question 2
A section of small intestine shows villi and large aggregates of lymphoid follicles in the wall. From which segment is it most likely taken?
- A. Duodenum
- B. Jejunum
- C. Ileum
- D. Stomach
- E. Esophagus
Answer: C. Peyer patches are characteristic of the ileum. Brunner glands in the submucosa mark the duodenum.
Question 3
A kidney section shows tubules lined by simple cuboidal epithelium with a prominent brush border. Which segment is this?
- A. Proximal convoluted tubule
- B. Thin descending limb
- C. Distal convoluted tubule
- D. Collecting duct
- E. Urothelium of the bladder
Answer: A. The brush border of microvilli is typical of the proximal convoluted tubule, which reabsorbs most of the filtrate.
Make it a plan
Add a short daily image block to your study routine. See our Step 1 and Step 2 CK preparation timelines for schedules and weekly milestones. This article is general educational guidance and not an individualized study plan.
Educational content only. Confirm current exam requirements with USMLE.