Lembaran formula, langkah kaedah utama untuk setiap topik dan 16 soalan latihan, dengan penyelesaian penuh di bahagian belakang.
“Tomás has worked as a paramedic for ten years. He says the hardest part of the job is not the long hours but telling families bad news.” What does Tomás find hardest about his job?
“Only 30 minutes after taking the new pill, I felt better,” said one customer in an advertisement. “It must be the best headache pill ever made.” Why is this weak evidence that the pill works?
Hitung 3 1/3 × 2 1/2. Klik jawapan dalam bentuk termudah.
Selesaikan untuk x: 7(x − 5) = 5x − 31.
Salur manakah yang membawa darah beroksigen dari paru-paru ke jantung?
Di bahagian usus kecil manakah vitamin B12 dan garam hempedu terutamanya diserap?
Mengapakah akson bermielin mengalirkan potensi tindakan lebih pantas daripada akson tidak bermielin?
Orang yang sihat berdiri dengan cepat selepas berbaring. Tindak balas refleks manakah yang mencegah pengsan?
What is the role of cholesterol in animal cell membranes?
Why is ATP described as an energy carrier rather than a long-term energy store?
Why is a carbon dioxide extinguisher effective on many fires?
Sulfuric acid reacts with sodium hydroxide: H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O. How many moles of NaOH neutralise 0.5 mol of H₂SO₄?
Choose the correct verb: “The pair of gloves ___ on the cart.”
Which sentence is a complex sentence?
Choose the meaning of the word in bold: “The nurse gave an antipyretic for the high temperature.”
What does the term gastrectomy mean?
Jawapan: C · Giving bad news to families
Tomás says the hardest part is “not the long hours but telling families bad news”. The structure “not … but” points to the correct answer.
Jawapan: A · It is one person’s experience, not a controlled study.
A single testimonial cannot show that the pill caused the improvement. Headaches often ease on their own, so a controlled study with many people is needed.
Jawapan: 8 1/3
Mendarab dan membahagi pecahan: mula-mula tukarkan nombor bercampur kepada pecahan tak wajar (2 1/3 = 7/3). Untuk mendarab, darabkan pengangka dan penyebut. Untuk membahagi, kekalkan pecahan pertama, tukar ÷ kepada ×, dan terbalikkan pecahan kedua (darab dengan salingannya). Batalkan faktor sepunya dan tulis hasilnya dalam bentuk termudah sebagai nombor bercampur.
Jawapan: x = 2
Menyelesaikan persamaan: lakukan perkara yang sama pada kedua-dua belah sehingga x berdiri sendiri. Buat asal operasi dalam urutan terbalik: mula-mula buat asal penambahan atau penolakan, kemudian pendaraban atau pembahagian. Hapuskan kurungan dengan sifat kebolehagihan, a(x + b) = ax + ab, dan kumpulkan sebutan x pada satu belah. Semak jawapan dengan menggantikannya semula.
Jawapan: B · Vena pulmonari
Empat vena pulmonari mengalirkan darah beroksigen ke dalam atrium kiri. Ia pengecualian utama kepada peraturan bahawa vena membawa darah tanpa oksigen.
Jawapan: D · Ileum terminal
Ileum terminal menyerap vitamin B12 (terikat pada faktor intrinsik) dan menyerap semula garam hempedu. Duodenum terutamanya menyerap zat besi.
Jawapan: A · Impuls melompat antara nod Ranvier
Mielin menebat akson, maka potensi tindakan hanya dijana pada nod Ranvier. Pengaliran lompatan ini jauh lebih pantas.
Jawapan: D · Refleks baroreseptor menaikkan kadar jantung dan vasokonstriksi
Darah bertakung di kaki dan tekanan jatuh; baroreseptor menjana kurang, yang meningkatkan aktiviti simpatetik dan mengurangkan aktiviti vagus dalam beberapa saat, menaikkan kadar jantung dan tonus vaskular.
Jawapan: B · It keeps membrane fluidity stable as temperature changes
Cholesterol molecules between the phospholipids stop the membrane from becoming too fluid when warm or too stiff when cold. Plant cells use a cell wall for rigidity instead.
Jawapan: C · Cells hold only a little and constantly recycle it from ADP
Cells keep only a small amount of ATP and remake it all the time from ADP and phosphate using energy from respiration. Long-term energy is stored as glycogen and fat.
Jawapan: B · CO₂ is denser than air and pushes oxygen away from the fire
CO₂ does not burn and is heavier than air, so it forms a layer that cuts off oxygen from the fire. It also cools the fire as the gas expands from the cylinder.
Jawapan: B · 1 mol
The equation shows a 1:2 ratio, so 0.5 mol H₂SO₄ needs 2 × 0.5 = 1 mol NaOH. Sulfuric acid is diprotic, releasing two H⁺ per molecule.
Jawapan: A · is
“Pair” is singular, so it takes “is”. The phrase “of gloves” does not change the subject.
Jawapan: B · Because the lab was closed, the samples were sent elsewhere.
“Because the lab was closed” is a dependent clause joined to an independent clause, which makes A complex. B, C and D join only independent clauses, so they are compound.
Jawapan: D · A drug that reduces fever
An antipyretic is a medicine that lowers a raised body temperature.
Jawapan: D · Surgical removal of all or part of the stomach
Gastr/o (stomach) + -ectomy (removal). Gastritis is inflammation and gastroscopy examination with a scope.
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