Respiratory alkalosis differs from metabolic alkalosis in that the

Correct Answer: D

Rationale: Respiratory alkalosis lowers PCO2 via hyperventilation; metabolic alkalosis raises HCO3-.

Correct Answer: C

Rationale: Cartilage is a soft skeletal tissue or connective tissue with spaced cells. The solid matrix consists of proteins and sugar. Cartilage smooths bone surfaces at joints and is present in the nose, ear, trachea and larynx.

Correct Answer: A

Rationale: Cuticle is waxy layer of aerial parts of a plant with cutin, secreted by the epidermis and prevent water loss.

Correct Answer: B

Rationale: Ectoderm, mesoderm, and endoderm are the three germ layers in an embryo from which all differentiated cells arise.

Correct Answer: A

Rationale: Skeletal muscle has striations, cylindrical cells, and multiple nuclei, unlike cardiac (branched, single nucleus) or smooth muscle (no striations).