TEAS Study Guide 2026

The duodenum is the first section of the small intestine, and it is the primary site for the chemical digestion of chyme and the absorption of most nutrients. While some absorption occurs throughout the small intestine, and the stomach digests food, the duodenum is where the bulk of nutrient uptake into the bloodstream happens.

Cellular respiration is the metabolic process that converts glucose and oxygen into ATP, the primary energy currency of the cell. This vital process primarily occurs within the mitochondria, often referred to as the 'powerhouses' of the cell, making them essential for generating cellular energy.

Saltatory conduction is the process by which action potentials propagate along myelinated axons. Instead of continuously traveling along the entire axon membrane, the electrical impulse 'jumps' from one node of Ranvier (gaps in the myelin sheath) to the next. This jumping mechanism significantly increases the speed of nerve impulse transmission, allowing for rapid communication within the nervous system.

A semicolon correctly joins two independent clauses. "She studied hard" and "she passed the exam" are both complete sentences that are closely related in meaning.

Red blood cells are produced through erythropoiesis in the red bone marrow, stimulated by the hormone erythropoietin from the kidneys.

Percentage = (score/total) × 100 = (84/120) × 100 = 0.70 × 100 = 70%.