Which type of cancer is derived from the stratum spinosum?

A. transitional epithelium - specialized for stretch: This is correctly matched. Transitional epithelium lines the urinary bladder and stretches to accommodate urine volume changes.

B. pseudostratified epithelium - multiple layers for protection: This is mismatched. Pseudostratified epithelium appears to have multiple layers due to nuclei at different levels, but all cells touch the basement membrane, so it is a single layer and not primarily for protection.

C. simple cuboidal - found in kidneys, glands, liver: Correctly matched. Simple cuboidal epithelium is commonly found in these organs and is involved in secretion and absorption.

D. keratinized stratified squamous - epidermis of skin: Correctly matched. This type of epithelium forms the outer layer of skin and provides protection against abrasion and water loss.

A. an inability to lay down new bone
Bone formation is the role of osteoblasts, not osteoclasts.

B. an inability to lay down cartilage
Cartilage is formed by chondroblasts, unrelated to osteoclasts.

C. an inability to regulate calcium
Osteoclasts resorb bone, releasing calcium into the bloodstream. Defective osteoclasts impair this process, disrupting calcium homeostasis.

D. an inability to create matrix
Osteoclasts break down bone matrix, they don’t create it. Matrix creation is done by osteoblasts.