Shared by a Veda teacher · 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.
Why deer beat daffodils at dodging
Coordination in animals is built around speed — sensing danger and food, and acting in milliseconds. The specialised cell that makes it possible is the NEURON, a living electrical wire.
↳ Fast responses demand a wired network — the nervous system.
A cell stretched into a wire
↳ Receive, process, conduct, pass on.
The gap the spark can't jump
Between neurons lies a microscopic gap — the synapse. The arriving electrical impulse releases chemicals; they drift across and restart the impulse in the next neuron's dendrites. The same chemistry commands muscles and glands.
↳ Electrical along the wire, chemical at the junction.
No nerves, no muscles — still moving
↳ Fast water tricks vs slow growth steering.
The plant that flinches
Touch Mimosa pudica and hinge cells at the leaflet bases dump their water — turgor collapses, cells go limp, leaflets fold shut. Signal relayed cell-to-cell, movement made hydraulically. No growth, no muscle — just water pressure released.
↳ The fold is plumbing, not flexing.
Growth with a compass
↳ Direction-locked growth = tropism.
How animals sense and respond at lightning speed — the neuron's design, the synapse, the reflex arc shortcut, the brain's three departments, its protection, and how muscles actually move.
~40 min · full explanation, examples & memory tricks in the app
How plants move without muscles or nerves — the instant turgor trick of the touch-me-not, the slow directional growth of tropisms, and the five plant hormones that run it all.
~35 min · full explanation, examples & memory tricks in the app
The body's slow-but-everywhere chemical messengers — adrenaline's emergency broadcast, thyroid and iodine, growth hormone's tall and short stories, insulin and diabetes, puberty's hormones, and the feedback thermostat th...
~35 min · full explanation, examples & memory tricks in the app
162 questions laddered from warm-up to topper-level, each with an explanation. A taste:
Consider these statements about the neuron. I. Dendrites receive information. II. The cell body processes it. III. The axon conducts the impulse away. IV. The impulse travels as a chemical along the whole length of the neuron. Which statements are correct?
AdvancedI, II and III only
Within one neuron the signal is electrical. It becomes chemical only at the synapse, where it has a gap to cross.
Which of these best explains why a nerve impulse changes from electrical to chemical and back again as it passes from one neuron to the next?
Advancedthere is a physical gap between the two neurons, and an electrical impulse cannot jump it, so a chemical is released to carry the signal across
The synapse is a real gap. Converting to a chemical also means the signal can only travel one way, which is what keeps nerve pathways orderly.
Assertion (A): A nerve impulse travels in one direction only, from dendrite to axon end. Reason (R): The chemical that crosses the synapse is released on one side of the gap only and detected on the other.
AdvancedBoth A and R are true, and R is the correct explanation of A
One-way traffic is built into the synapse itself. If the gap worked in both directions, a single stimulus would set off signals running backwards through the whole network.
What is the best explanation of why nervous coordination is fast but short-lived, while hormonal coordination is slow but sustained?
Advanceda nerve carries an electrical signal along a fixed wire to one target, while a hormone is released into the blood and reaches many cells gradually
Wiring gives speed and precision; broadcasting gives reach and duration. Between them they cover jobs neither could do alone, from pulling back a hand to growing up.
66 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.
