Biology by Bradford
C2.2 Neural signalling: grass skirts
20 quick questions on neural signalling, 12 of them at standard level, each answered in a word or two. Print a sheet for each team, a key for the checker and a tick sheet, then tape the sheets to the board and race.
How it runs
- SnipA runner cuts one strip off the bottom of their team’s sheet.
- Answer as a pairBack at the table, they write the answer on the strip. No books.
- Get it checkedThe checker reads it against the key: you, or a student holding it.
- Back for the nextA tick earns the next strip. Wrong? Back to the table to try again.
The questions on this sheet
The checker’s key, with every answer, prints with the sheets.- Part of a neuron holding the nucleus
- Long fibre carrying impulses to terminals
- Short branch receiving input from neurons
- About −70 mV across an inactive membrane
- Charge spike that travels along an axon
- Fatty insulation that speeds impulses
- Any junction where a neuron passes signals
- Gap that a transmitter diffuses across
- Transmitter at neuromuscular junctions
- Sets up neuron ion gradients using ATP
- Cleft enzyme that breaks down transmitter
- Transmitter-caused rise towards threshold
- Na⁺ rushing in makes the inside positive
- K⁺ leaving restores a negative inside
- About −55 mV, the level needed to fire
- Impulse jumping between nodes of Ranvier
- Recovery time before an axon refires
- Hyperpolarization from Cl⁻ entering
- Combining many inputs to reach threshold
- Pesticide binding insect ACh receptors