Lembar rumus, langkah-langkah metode utama untuk setiap topik, dan 16 soal latihan, dengan pembahasan lengkap di bagian belakang.
“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?
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?
Nilai kuis seorang siswa adalah 62, 77, 91, 58. Berapa nilai rata-rata x̄?
Selesaikan untuk x: 2(x − 1) = x + 7.
Manakah dari organ berikut yang retroperitoneal?
Seorang pasien mengalami kelopak mata turun, pupil melebar, dan mata yang diam pada posisi "ke bawah dan ke luar". Saraf mana yang paling mungkin rusak?
Pada otot rangka, dari mana sebagian besar kalsium untuk kontraksi berasal?
Studi klasik Hodgkin dan Huxley tentang dasar ionik potensial aksi menggunakan preparat apa?
Nearly all cells in a person's body contain the same DNA. Why do nerve cells and muscle cells look and work so differently?
A plant is kept in the dark to use up its starch. One leaf is then sealed in a bag with a chemical that absorbs CO₂, and the plant is placed in light. Later, that leaf has no starch, but the other leaves do. What does this show?
What is the name of the molecular compound CO?
Ammonia (NH₃) has three bonding pairs and one lone pair on nitrogen. What is its shape?
What is the subject of this sentence? “Behind the curtain stood a tall man.”
Choose the best transition to begin a concluding sentence: “___, regular hand washing is one of the simplest ways to prevent infection.”
Choose the meaning of the word in bold: “The footballer had a large contusion on his thigh.”
Choose the word that best completes the sentence: “The nurse ___ the wound with saline to wash out the debris.”
Jawaban: C · Anxious
Tapping his foot, staring at the door and checking his phone repeatedly suggest nervousness or anxiety.
Jawaban: A · 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.
Jawaban: x̄ = 72
Rata-rata, median, modus, dan jangkauan: rata-rata (mean) adalah jumlah dibagi banyaknya nilai. Median adalah nilai tengah setelah nilai diurutkan; jika banyak nilai genap, median adalah rata-rata dari dua nilai tengah. Modus adalah nilai yang paling sering muncul. Jangkauan adalah nilai terbesar dikurangi nilai terkecil.
Jawaban: x = 9
Menyelesaikan persamaan: lakukan hal yang sama pada kedua ruas sampai x berdiri sendiri. Batalkan operasi dengan urutan terbalik: batalkan penjumlahan atau pengurangan lebih dahulu, lalu perkalian atau pembagian. Hilangkan tanda kurung dengan sifat distributif, a(x + b) = ax + ab, dan kumpulkan suku x di satu ruas. Periksa jawaban dengan menyubstitusikannya kembali.
Jawaban: C · Ginjal
Ginjal terletak di belakang peritoneum parietal. Lambung, limpa, dan kolon transversum bersifat intraperitoneal dan memiliki mesenterium atau ligamen.
Jawaban: B · Saraf okulomotor (III)
Saraf okulomotor mempersarafi sebagian besar otot mata, levator palpebra, dan konstriktor pupil. Lesinya membuat rektus lateral dan oblikus superior bekerja tanpa lawan, sehingga mata bergerak ke bawah dan ke luar.
Jawaban: C · Retikulum sarkoplasma
Depolarisasi tubulus T membuka reseptor ryanodin di retikulum sarkoplasma, sehingga kalsium yang tersimpan dilepaskan ke sitoplasma.
Jawaban: B · Akson raksasa cumi-cumi
Akson raksasa cumi-cumi lebarnya hingga sekitar 1 mm, sehingga elektroda voltage-clamp dapat dimasukkan. Studi ini menunjukkan bahwa aliran masuk natrium dan aliran keluar kalium menghasilkan potensial aksi.
Jawaban: C · Different genes are switched on in each type of cell
Each cell type expresses a different set of genes, making different proteins. Muscle cells express genes for contractile proteins, and nerve cells express genes for neurotransmitters and ion channels.
Jawaban: D · Carbon dioxide is needed for photosynthesis
All leaves had light and chlorophyll, but the bagged leaf had no CO₂. Since it made no starch, CO₂ must be needed. The other leaves acted as the control.
Jawaban: C · Carbon monoxide
For molecular compounds, prefixes give the number of atoms: CO has one oxygen, so it is carbon monoxide. "Mono-" is not used for the first element.
Jawaban: C · Trigonal pyramidal
The four electron pairs point roughly tetrahedrally, but shape is described by the atoms only. With one corner taken by a lone pair, the N and three H atoms form a pyramid.
Jawaban: D · man
The sentence means “A tall man stood behind the curtain.” The subject is “man”; “curtain” is the object of the preposition.
Jawaban: C · In conclusion
“In conclusion” signals a summary of the main idea. “For instance” gives an example, “in contrast” shows difference and “meanwhile” shows time.
Jawaban: C · A bruise
A contusion is a bruise caused by a blow that damages small blood vessels under the skin.
Jawaban: D · irrigated
To irrigate a wound is to flush it with a stream of fluid to clean it.
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