Lembaran formula, langkah kaedah utama untuk setiap topik dan 16 soalan latihan, dengan penyelesaian penuh di bahagian belakang.
“Despite his fear of heights, Leo climbed the tall ladder to rescue the kitten stuck on the roof.” What does this show about Leo?
A report says: “In 2020, the clinic saw 400 patients with asthma. In 2023, it saw 600.” Which conclusion is best supported?
Dua sukarelawan berkongsi $160 dalam nisbah 5 : 3. Berapakah x yang diperoleh oleh orang yang mendapat bahagian lebih besar, dalam dolar?
Gunakan tertib operasi untuk mencari nilai x: x = −2² + 3 × 2.
Dua kawasan manakah pada tulang belakang dewasa yang biasanya menunjukkan lordosis (lengkung cekung ke arah belakang)?
Prolaps cakera pusat yang besar pada L4–L5 menyebabkan anestesia pelana, pengekalan kencing dan kelemahan kedua-dua kaki. Struktur manakah yang tertekan?
Sel manakah dalam perut yang merembeskan asid hidroklorik?
Pengangkut manakah dalam anggota naik tebal gelung Henle yang penting untuk membina kecerunan kepekatan medula?
What is a bacterial endospore?
Liver cells take in cholesterol-carrying LDL particles only after the particles bind to specific proteins on the cell surface. Which process is this?
What colour is phenolphthalein indicator in a basic solution?
A solution of acetic acid conducts electricity only weakly, while hydrochloric acid of the same concentration conducts strongly. Why?
Which sentence uses parentheses correctly to add extra information?
What kind of sentence is this? “Although the storm was strong, the power stayed on, and the clinic remained open.”
Choose the meaning of the word in bold: “A sedentary lifestyle increases the risk of heart disease.”
Which word means “a surgical puncture of the abdominal cavity to remove fluid”?
Jawapan: B · He was brave enough to face his fear.
“Despite his fear” shows he was afraid but climbed anyway to help the kitten, which shows courage.
Jawapan: A · The clinic saw 50 percent more asthma patients in 2023.
The rise from 400 to 600 is 200, which is 50 percent of 400. The data come from one clinic, so they cannot show a national trend or explain the cause.
Jawapan: x = 100 $
Nisbah dan kadaran: nisbah a : b membandingkan dua kuantiti. Dalam kadaran dua nisbah adalah sama, a/b = c/d, dan anda menyelesaikannya dengan darab silang: a·d = b·c. Untuk berkongsi suatu jumlah dalam nisbah m : n, bahagikannya kepada m + n bahagian yang sama; satu bahagian ialah m bahagian, yang satu lagi n bahagian.
Jawapan: x = 2
Tertib operasi (PEMDAS/BODMAS): kerjakan yang berada dalam kurungan dahulu, kemudian eksponen (kuasa), kemudian pendaraban dan pembahagian dari kiri ke kanan, dan akhir sekali penambahan dan penolakan dari kiri ke kanan. Pendaraban tidak datang sebelum pembahagian, dan penambahan tidak datang sebelum penolakan: setiap pasangan dikerjakan mengikut urutan kemunculannya. Nombor negatif dalam kurungan mengekalkan tandanya apabila dikuasa duakan: (−3)² = 9, tetapi −3² = −9.
−2² bermaksud −(2²) = −4: eksponen datang sebelum tanda tolak.
Jawapan: A · Serviks dan lumbar
Kawasan serviks dan lumbar bersifat lordotik (lengkung sekunder). Kawasan toraks dan sakral bersifat kifotik (lengkung primer).
Jawapan: C · Kauda ekuina
Di bawah L1–L2 kanal mengandungi kauda ekuina. Tekanan pusat pada akar lumbar dan sakral ini menyebabkan sindrom kauda ekuina, kecemasan pembedahan.
Jawapan: A · Sel parietal
Sel parietal merembeskan HCl dan faktor intrinsik. Sel utama merembeskan pepsinogen dan sel G merembeskan gastrin.
Jawapan: A · Kotransporter Na⁺–K⁺–2Cl⁻ (NKCC2)
NKCC2 memindahkan Na⁺, K⁺ dan Cl⁻ keluar dari tubul ke dalam interstisium tanpa air, membina kecerunan medula. Diuretik gelung seperti furosemid menyekatnya.
Jawapan: D · A tough, dormant form that survives heat, drying and many disinfectants
Some bacteria, such as Clostridium and Bacillus, form endospores to survive harsh conditions. Spores resist boiling and alcohol, which is why sterilisation methods such as autoclaving are needed to kill them.
Jawapan: A · Receptor-mediated endocytosis
In receptor-mediated endocytosis, the substance binds to specific receptors, and that part of the membrane folds in to form a vesicle. Pinocytosis takes in fluid without such specificity, and exocytosis releases material.
Jawapan: B · Pink
Phenolphthalein is colourless in acidic and neutral solutions and turns pink in basic solutions (above about pH 8–10). It is widely used in acid–base titrations.
Jawapan: B · Acetic acid only partly ionises, so it forms fewer ions
HCl ionises almost completely (a strong electrolyte), while acetic acid ionises only slightly (a weak electrolyte). Fewer ions carry less current.
Jawapan: B · The reading (taken at 9 a.m.) was normal.
Parentheses enclose extra information that can be removed. In A, “The reading was normal” is still a complete sentence.
Jawapan: B · Compound-complex
There are two independent clauses (“the power stayed on”, “the clinic remained open”) and one dependent clause (“Although the storm was strong”), which makes it compound-complex.
Jawapan: C · Inactive, with much sitting
Sedentary means involving little physical activity.
Jawapan: A · Paracentesis
Paracentesis removes fluid from the abdominal cavity; thoracentesis removes fluid from the chest.
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