Histology quiz

More questions about Histology

These visible examples show the question style. LearnClash turns the full topic into ranked duels and spaced repetition.

1. 1 Easy

   Why does skin turn tan after sun exposure?

   Answer: Increased melanin production

   Why: The pigment is passed from its makers into the surrounding skin cells, where it shades the nucleus from above.

2. 2 Medium

   Which white blood cell is the most abundant in a healthy human?

   Answer: neutrophils

   Why: They arrive first at an infection and die there in bulk, and the debris of that battle is what pus mostly is.

3. 3 Hard

   Which stain identifies glycogen and carbohydrate-rich structures in tissue samples?

   Answer: PAS stain

   Why: It oxidises sugar rings to aldehydes, which then bind a magenta dye, so glycogen-rich liver lights up strongly.

4. 4 Easy

   What connective tissue connects one bone to another bone?

   Answer: ligament

   Why: They are dense fibrous cables that resist pull in one direction, and their poor blood supply is why a torn one heals far slower than a bruised muscle.

5. 5 Medium

   What covers the outer surface of a bone, except at joints?

   Answer: periosteum

   Why: It is packed with pain-sensing nerves, which is why a broken bone hurts so sharply.

6. 6 Hard

   Which cell junctions allow for direct electrical communication between adjacent cells?

   Answer: gap junctions

   Why: Their connexin pores pass ions and molecules under about one kilodalton, and between neurons that direct current flow is what defines an electrical synapse.