What is the primary function of desmosomes in cell junctions?

Correct Answer: B

Rationale: Desmosomes provide mechanical strength to tissues.

Correct Answer: A

Rationale: Cardiac muscle is involuntary, striated, and found in the heart, distinguishing it from other muscle types.

Correct Answer: B

Rationale: RBCs contain carbonic anhydrase to facilitate CO2 transport; they contribute to viscosity but don't burst in isotonic 0.9% saline.

Correct Answer: A

Rationale: CSF is formed by filtration of plasma in the choroid plexus; glucose is lower (~60 mg/dL) than plasma (~100 mg/dL).

Correct Answer: A

Rationale: HDN affects Rh+ babies of Rh- mothers; anti-D injection post-delivery prevents maternal sensitization.