Contain tonofilament that connected by desmosome

Correct Answer: D

Rationale: Epithelial reticular cells have tonofilaments and desmosomes for structural support.

Correct Answer: A

Rationale: Hyperinflation results from loss of lung elasticity , as in emphysema; fibrosis (B, C) restricts expansion, bronchiectasis causes dilation, not hyperinflation.

Correct Answer: A

Rationale: APCs use B7 to bind CD28 on T cells for co-stimulation ; CD4/CD8 (B, C) are T-cell co-receptors, CD40 is for B cells.

Correct Answer: B

Rationale: DTH recruits macrophages and neutrophils ; T cells drive it, but B cells and NK cells are less central.

Correct Answer: C

Rationale: Lymph nodes house and produce lymphocytes, filter lymph , but red blood cell production occurs in bone marrow, not lymph nodes.