Kit Library / Science / Physics & Chemistry & Biology
⚡ Topic Learning KitShared by a Veda learner · Generated with Veda AI
Veda Bites are swipeable micro-lessons — each one teaches exactly one idea. Here's a taste from this kit; the app has the full deck.
Breathing moves air — diffusion moves oxygen.
Breathing (ventilation) only brings air to the lungs. The actual exchange of gases happens by diffusion across the alveolar membrane.
↳ Breathing is mechanical; gaseous exchange is passive diffusion across alveoli.
Master these terms before the exam.
↳ Alveoli + haemoglobin + diffusion = the core machinery of gas exchange.
Follow the oxygen molecule's journey.
Each step relies on concentration gradients — O₂ always moves from where it is more to where it is less.
↳ Oxygen travels nose → trachea → bronchi → alveoli → blood → cells.
This kit covers three foundational science topics: how humans exchange gases in the lungs, the core concepts of electricity including current, voltage and resistance, and the nature of pathogenic diseases caused by bacte…
~20 min · full explanation, examples & memory tricks in the app
18 questions laddered from warm-up to topper-level, each with an explanation. A taste:
In which part of the human respiratory system does gaseous exchange actually take place?
BeginnerAlveoli
The alveoli are the tiny balloon-like sacs at the end of the bronchioles where oxygen diffuses into the blood and carbon dioxide diffuses out. The trachea, bronchi and bronchioles are only conducting airways.
A student notes that oxygen moves from the alveoli into the blood without any pump pushing it. Which process explains this?
BeginnerDiffusion from higher to lower concentration
Inhaled air is rich in oxygen while blood arriving at the alveoli is oxygen-poor, so oxygen simply diffuses down its concentration gradient. No energy or pump is required for the gases themselves.
Which statement correctly describes what happens during inhalation?
BeginnerThe diaphragm contracts and flattens.
During inhalation the diaphragm contracts and flattens while the ribs move up and out. Chest volume increases, pressure inside drops below atmospheric pressure, and air rushes in.
Which of these is the correct unit for electric current?
BeginnerAmpere
Current is the rate of flow of electric charge and is measured in amperes (A). Volts measure potential difference and ohms measure resistance.
22 flashcards in this kit — the app reviews them with spaced repetition so the right card returns on the right day.
Every game is built from this kit's own content — scores feed your mastery, so playing counts as studying.
The full Veda Bites deck, complete notes, spaced-repetition flashcards, leveled MCQs, tests and games for this kit — plus Daily Facts and the Arena, every day.
