Formula sheets, the key method steps for every topic and 16 practice problems, with full solutions at the back.
“The new teacher wrote her name on the board, smiled and said, ‘Let’s start by learning one interesting fact about each of you.’” What can you infer about the teacher’s goal?
Read the two statements. Statement 1: “Walking 30 minutes a day lowers the risk of heart disease.” Statement 2: “Walking is the most enjoyable form of exercise.” Which is true?
A town had 125 registered nurses last year and has 110 this year. What is the percent decrease p?
Which fraction or mixed number in lowest terms equals the decimal 1.67? Click it.
Which cranial nerve controls movement of the tongue?
Where does the thoracic duct usually empty its lymph into the blood?
During which phase of the cardiac cycle are all four heart valves closed while ventricular pressure rises?
Spirometry shows reduced FEV1 and reduced FVC, with a normal or high FEV1/FVC ratio. What pattern is this?
Which sequence is complementary to the DNA strand A-T-G-C-C-A?
Potato cylinders are placed in sugar solutions of different strengths. They gain mass in weak solutions, lose mass in strong ones and show no change at 0.3 mol/L. What can be concluded?
Why does the vapour pressure of a liquid increase as it is heated?
Balance the equation __C₃H₈ + __O₂ → __CO₂ + __H₂O. What is the coefficient of O₂?
Choose the correct word: “Last night he ___ awake for hours.”
Choose the correct word for formal writing: “I do not know ___ the manager will choose.”
Choose the meaning of the word in bold: “The supply room is adjacent to the nurses’ station.”
Choose the meaning of the word in bold: “The child with croup had loud stridor.”
Answer: B · She wants to get to know her students.
Asking for an interesting fact about each student shows she wants to get to know them.
Answer: B · Statement 1 can be tested; Statement 2 is an opinion.
Statement 1 can be checked with research. “Most enjoyable” is a personal judgement, so Statement 2 is an opinion.
Answer: p = 12 %
Percent means per hundred: p% of a number is (p/100) × the number. To find what percent A is of B, divide A by B and multiply by 100. A percent change compares the change with the original value: percent change = (new − original)/original × 100.
Answer: 1 67/100
Fractions, decimals and percents are three ways to write the same number. Fraction → decimal: divide the numerator by the denominator. Decimal → percent: multiply by 100 (move the point two places right). Percent → decimal: divide by 100. Decimal → fraction: write the digits over 10, 100 or 1000 (one zero per decimal place) and simplify.
Answer: C · Hypoglossal nerve (XII)
The hypoglossal nerve supplies the intrinsic and most extrinsic tongue muscles. A lesion makes the protruded tongue deviate towards the affected side.
Answer: A · Junction of the left subclavian and left internal jugular veins
The thoracic duct drains lymph from both legs, the abdomen and the left side of the upper body into the left venous angle. The right lymphatic duct drains the rest into the right venous angle.
Answer: B · Isovolumetric contraction
After the AV valves close, the ventricles contract against closed semilunar valves. Pressure rises with no volume change until the aortic and pulmonary valves open.
Answer: D · A restrictive pattern, as in pulmonary fibrosis
In restrictive disease the lungs are small or stiff, so both FEV1 and FVC fall but the ratio is preserved. Obstruction lowers FEV1 more than FVC.
Answer: C · T-A-C-G-G-T
Each base is replaced by its partner: A→T, T→A, G→C, C→G. Using U would make an RNA copy, not a DNA strand.
Answer: D · The potato cells have a solute concentration of about 0.3 mol/L
Where there is no net osmosis, the solution is isotonic with the cells. So the cell contents have a solute concentration roughly equal to 0.3 mol/L sugar solution.
Answer: C · More molecules have enough energy to escape into the gas phase
At higher temperatures a larger share of molecules has enough energy to overcome intermolecular attractions and escape. More molecules in the vapour means a higher vapour pressure.
Answer: C · 5
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O. The products have 3 × 2 + 4 × 1 = 10 oxygen atoms, which needs 5 O₂.
Answer: C · lay
“Lie” means to recline: lie, lay, lain. “Laid” is the past of “lay” (to put something down), and “lied” means told an untruth.
Answer: B · whom
In the clause “the manager will choose him/her”, the pronoun is the object of “choose”, so the object form “whom” is correct.
Answer: D · Next to
Adjacent means next to or adjoining something.
Answer: A · High-pitched noisy breathing
Stridor is a harsh, high-pitched breathing sound caused by obstruction of the upper airway.
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