Formula sheets, the key method steps for every topic and 16 practice problems, with full solutions at the back.
“The waiting room was silent except for the slow tick of the clock. Sam stared at the door, tapping his foot and checking his phone every few seconds.” How does Sam most likely feel?
“The children’s hospital opened a play room. Since then, nurses report that children are calmer before procedures and need fewer extra staff to help hold them still.” What can be inferred about the play room?
Convert 7.2 km to centimetres x.
A gym charges a one-time sign-up fee of $40 plus $35 per month. Maria has paid $215 in total. For how many months n has she been a member?
The hepatic portal vein is formed by the union of which two veins?
Why does an inhaled foreign body more often lodge in the right main bronchus than the left?
Which hormone is released by the adrenal cortex in response to ACTH?
Which spirometry finding is typical of chronic obstructive pulmonary disease (COPD)?
How can bacteria pass antibiotic-resistance genes directly to other bacteria?
A scientist wants to show that a particular microbe causes a disease. According to Koch's postulates, which step is needed?
At STP (0 °C and 1 atm), what volume does 1 mole of an ideal gas occupy?
Which coefficients balance the equation for cellular respiration, __C₆H₁₂O₆ + __O₂ → __CO₂ + __H₂O?
Which sentence uses a reflexive pronoun correctly?
Put these sentences in the most logical order: (1) As a result, she was admitted for observation. (2) The patient arrived with chest pain. (3) Her ECG showed abnormal results.
Choose the meaning of the word in bold: “The patient complained of general malaise.”
What does the term atherosclerosis mean?
Answer: A · Anxious
Tapping his foot, staring at the door and checking his phone repeatedly suggest nervousness or anxiety.
Answer: A · It may help reduce children’s fear before procedures.
Children being calmer and needing less holding suggests the play room helps reduce their anxiety. The passage does not say procedures stopped.
Answer: x = 720000 cm
Unit conversions: multiply by a factor that equals 1, written so that the old unit cancels: 3 ft × 12 in/1 ft = 36 in. Metric length: 1 km = 1000 m, 1 m = 100 cm = 1000 mm, 1 cm = 10 mm. US customary: 1 ft = 12 in, 1 yd = 3 ft, 1 mi = 5280 ft; 1 gal = 4 qt, 1 qt = 2 pt, 1 pt = 2 cups; 1 ton = 2000 lb. Time: 1 h = 60 min, 1 min = 60 s, 1 day = 24 h, 1 week = 7 days. A smaller unit gives a bigger number.
Answer: n = 5 months
Word problems: name the unknown (for example x = number of months), write the facts as one equation, solve it, and check that the answer makes sense in the story. A fixed fee plus a rate per unit gives total = fee + rate × units.
Answer: A · Superior mesenteric vein and splenic vein
The portal vein forms behind the neck of the pancreas from the superior mesenteric and splenic veins. It carries nutrient-rich blood to the liver.
Answer: B · The right bronchus is wider, shorter and more vertical
The right main bronchus is wider, shorter and continues more directly in line with the trachea, so aspirated objects tend to fall into it.
Answer: C · Cortisol
ACTH from the anterior pituitary stimulates cortisol release from the zona fasciculata. Adrenaline comes from the adrenal medulla.
Answer: B · FEV1/FVC ratio below 0.7
Narrowed airways slow expiration, so FEV1 falls more than FVC and the ratio drops below 0.7. In COPD this is not fully reversed by bronchodilators.
Answer: D · By conjugation, transferring plasmids through a pilus
In conjugation one bacterium transfers a copy of a plasmid to another through a bridge called a pilus. Plasmids often carry resistance genes, which can spread quickly even between species.
Answer: A · The microbe grown from a sick host must cause the disease in a healthy host
Koch's postulates require the microbe to be found in sick hosts, grown in pure culture, cause the same disease when given to a healthy host, and be recovered again from that host.
Answer: B · 22.4 L
One mole of any ideal gas at 0 °C and 1 atm occupies 22.4 L, called the molar volume. It does not depend on which gas it is.
Answer: A · 1, 6, 6, 6
6 C gives 6CO₂; 12 H gives 6H₂O. Oxygen on the right is 12 + 6 = 18; glucose supplies 6, so 12 more from 6O₂. C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O.
Answer: B · She reminded herself to drink water.
“Herself” refers back to the subject “she”. In the other sentences there is no matching subject, so “me” or “I” is needed instead of “myself”.
Answer: C · 2, 3, 1
The paragraph moves in time and from cause to effect: arrival with chest pain, then the abnormal test, then the admission introduced by “As a result”.
Answer: C · A vague feeling of being unwell
Malaise is a general feeling of discomfort or illness without a specific cause.
Answer: A · Hardening and narrowing of arteries from fatty plaque
Atherosclerosis is the build-up of fatty plaque in artery walls, which hardens and narrows them.
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