Free ATI TEAS Exam Questions That Helps Candidates Pass

For draws without replacement, multiply conditional probabilities. First draw good: ( \frac{12}{15} = \frac{4}{5} ). After removing one good syringe, remaining good = 11; total remaining = 14. Second draw good: ( \frac{11}{14} ). Combined probability: ( \frac{4}{5} \times \frac{11}{14} = \frac{44}{70} = \frac{22}{35} ). Thus, choice B is correct. Choice A ((\frac{11}{35})) is roughly half the correct value and can result from erroneously multiplying numerators without adjusting the first fraction or from dividing by 70 twice. Choice C ((\frac{8}{15})) corresponds to the probability of first draw good times something incorrect, or to treating draws as independent with the same denominator (which they are not). Choice D ((\frac{2}{5})) is an unrelated simplification. TEAS probability items hinge on recognizing dependence: in without-replacement scenarios, update counts after each draw. Reduce fractions at the end to simplest form to match answer choices and verify reasonableness (value ≈ 0.629).

Approximately 70% of CO₂ is transported as bicarbonate (HCO₃⁻) in plasma. Inside red blood cells, carbonic anhydrase catalyzes ( \text{CO₂} + \text{H₂O} \leftrightarrow \text{H₂CO₃} \leftrightarrow \text{H⁺} + \text{HCO₃⁻} ). Bicarbonate then exits into plasma in exchange for chloride (the chloride shift). About 20–23% binds to hemoglobin’s globin chains as carbaminohemoglobin (B), and roughly 7–10% remains dissolved (A). Little circulates as intact carbonic acid (D) because it rapidly dissociates at physiological pH. This chemistry underlies CO₂ transport and acid–base balance: tissues producing CO₂ drive the reaction rightward, increasing H⁺ and prompting oxygen unloading (Bohr effect); in the lungs, CO₂ is exhaled, shifting leftward and facilitating oxygen loading. TEAS often asks you to choose the predominant form—remember: bicarbonate in plasma is the main carrier, aided by rapid erythrocyte enzymatic conversion and ionic exchange mechanisms.

A colon should follow a complete independent clause and introduce an explanation, list, or example. Option B uses a full clause (“The nurse restocked the following”) and then the colon to introduce the list—correct. A places a colon after a verb directly followed by objects, which many style guides discourage (“restocked:” isn’t a complete stand-alone statement). C misuses a comma before the colon and interrupts the clause. D lacks the colon and instead creates an appositive list; while not always wrong, it doesn’t match the prompt’s requirement to use a colon and also risks a comma splice feel. TEAS tip: If you can put a period where the colon sits and still have a complete sentence, the colon placement is likely valid (“The nurse restocked the following.”). Colons can also precede a single item that restates or explains (“There is one goal: safety.”), but avoid inserting them after to be or prepositions unless the preceding words form a complete clause.

TEAS Reading often asks you to distinguish supported conclusions from unsupported inferences. The notice explicitly states that eastbound Maple Ave is closed during the listed hours and instructs drivers to use a detour, adding “Expect delays.” From this, the logical, text-based conclusion is that eastbound travelers should plan an alternate route (B). Option A is not supported; it says local access will be maintained, implying businesses can remain open. Option C overreaches: the notice concerns traffic for water-main repairs, not a boil-water advisory or water quality issue. Option D assumes symmetry; the text specifies eastbound only and does not mention westbound closure. Strategy: anchor conclusions in exact wording (closed direction, date, hours) and be wary of “all,” “always,” or citywide claims that the text does not explicitly make. On TEAS, choose the option that paraphrases the document’s operational instruction rather than one that speculates about unrelated consequences.

The atrioventricular (AV) valves—the tricuspid (right side) and mitral/bicuspid (left side)—separate atria from ventricles. During ventricular systole (contraction), pressure rises in the ventricles and forces these valves closed, preventing retrograde flow into the atria. Chordae tendineae and papillary muscles stabilize valve leaflets to avoid prolapse. In contrast, semilunar valves (pulmonary and aortic) prevent backflow from the great arteries into the ventricles during diastole; they do not separate atria from ventricles. The SA node (A) initiates the heart’s intrinsic pacemaker activity and sets rate; it has no mechanical role in preventing backflow. Purkinje fibers (D) rapidly conduct depolarization through the ventricles to coordinate contraction. TEAS emphasizes matching structure to function: AV valves = stop backward flow toward atria; semilunar valves = stop backward flow from arteries; conduction tissues (SA node, AV node, bundle branches, Purkinje) coordinate timing rather than physically controlling flow.