Navigasi
Soal 101 / 140
TOEFL-ITP
▼
TOEFL ITP Preparation - Paket 12 101 / 140
TOEFL-ITP
🔒 Anda sedang melihat pratinjau soal
Login untuk ikuti tryout lengkap dengan timer, simpan jawaban, dan lihat skor akhir Anda.
Masuk dengan Google — Gratis
TOEFL ITP Preparation - Paket 12
TOEFL-ITP
TOEFL ITP - Reading Comprehension
101. Read the following passage, then answer the question below.
Nearly every living thing, from bread mold to humans, follows a daily rhythm of activity that continues even without clues from the outside world. In 1962, the French cave explorer Michel Siffre tested this idea by living for two months in a cave in the Alps, with no clock and no daylight. He slept and woke by his own sense of time, and he found that his body settled into a cycle of roughly a day, though not exactly twenty-four hours. Later experiments with larger groups confirmed that the internal period is close to, but usually slightly longer than, a solar day. This is why the rhythms are called circadian, from Latin words meaning 'about a day.'
If the internal clock runs a little long, something must reset it daily, and that something is light. Specialized cells in the retina detect brightness, especially the blue-rich light of morning, and send signals to a cluster of neurons in the hypothalamus that acts as a master clock. This cluster coordinates the timing of hormones, body temperature, and alertness throughout the body. In the evening, as darkness approaches, the brain releases melatonin, a hormone that prepares the body for sleep.
Problems arise when daily schedules clash with the clock. Travelers crossing time zones experience jet lag until their bodies shift to the new light pattern, and the adjustment is often estimated at about a day for each hour of difference. Shift workers face a more persistent mismatch, and studies link long-term night work to higher risks of heart disease and diabetes. Even exposure to bright screens late in the evening may delay melatonin release, although researchers disagree about how large the effect is. What is clear is that the clock does not respond to willpower. It follows light, and ignoring it carries a cost.
What is the main idea of the passage?
Jawaban: C
Pembahasan: Teks menjelaskan ritme harian yang tetap berjalan tanpa petunjuk luar tetapi disetel ulang oleh cahaya.
Paket soal lain di kategori ini
Lanjut latihan dengan paket lain yang sejenis.
Soal lain yang bisa kamu coba
Pilihan acak dari kategori yang sama.
- Listen to the conversation, then answer the question.What problem does the librarian mention about the microf. TOEFL ITP Preparation - Paket 08 · Soal 32 · TOEFL ITP - Listening Part B
- Read the following passage, then answer the question below.Coral reefs cover less than one percent of the oce. TOEFL ITP Preparation - Paket 01 · Soal 96 · TOEFL ITP - Reading Comprehension
- Identify the one underlined word or phrase that must be changed for the sentence to be correct.Between you an. TOEFL ITP Preparation - Paket 01 · Soal 78 · TOEFL ITP - Structure and Written Expression
- Listen to the conversation, then answer the question.What worries the student about the new topic? TOEFL ITP Preparation - Paket 01 · Soal 32 · TOEFL ITP - Listening Part B
- Read the following passage, then answer the question below.Between roughly 800 and 950 CE, many of the great. TOEFL ITP Preparation - Paket 01 · Soal 112 · TOEFL ITP - Reading Comprehension
Kategori terkait
Paket dari kategori yang masih satu rumpun.
Mungkin kamu juga tertarik
Matematika STIS - Paket 01
Seleksi Lanjutan Sekolah Kedinasan STIS
40 soal · 95 menit
Lihat Bank Soal
Seleksi Kompetensi Tambahan Tendik (Administrasi Perkantoran) - Paket 05
Seleksi Kompetensi Tambahan Administrasi Perkantoran
75 soal · 70 menit
Lihat Bank Soal