Neural signalling

Biologia IBPaper 1B, maj 2026, TZ1wzorowane3 pktotwarteśrednie (szac.)

Zadanie 3a

(i) Identify the type of scale used on both axes. (ii) Suggest why these scales are useful here. (iii) Identify the overall relationship between diameter and conduction speed.

• Materiał graficzny

Biologia IBPaper 1B, maj 2026, TZ1wzorowane1 pktotwarteśrednie (szac.)

Zadanie 3b

Outline the structural feature that lets a mammalian axon conduct at a speed comparable with a much wider squid axon.

• Materiał graficzny

Biologia IBPaper 2, maj 2026, TZ1wzorowane1 pktotwarteśrednie (szac.)

Zadanie 4a

Draw an arrow on the model to show the direction in which the signal is transmitted.

• Materiał graficzny

Biologia IBPaper 2, maj 2026, TZ1wzorowane1 pktotwarteśrednie (szac.)

Zadanie 4b

Identify the type of molecule marked Z.

• Materiał graficzny

Biologia IBPaper 2, maj 2026, TZ1wzorowane2 pktotwarteśrednie (szac.)

Zadanie 4c

Explain how calcium contributes to transmission at this junction.

• Materiał graficzny

Biologia IBPaper 2, maj 2026, TZ2wzorowane16 pktotwartetrudne (szac.)

Zadanie 7

A membrane’s molecular organization underlies selective transport and electrical properties. (a) Outline phospholipid structure and its interactions with water. (b) Explain how proteins enable substances to cross membranes. (c) Describe the establishment of a…

Biologia IBPaper 1A, maj 2026, TZ1wzorowane1 pktzamknięteśrednie (szac.)

Zadanie 11

How does an axon maintain the ion gradients needed for its resting potential? A. ATP-driven pumps transport sodium outward and potassium inward B. Every sodium and potassium ion diffuses outward until none remains C. ATP pumps both sodium and potassium inward…

Biologia IBPaper 1A, maj 2026, TZ2wzorowane1 pktzamknięteśrednie (szac.)

Zadanie 11

An action potential reaches a chemical synapse. Which immediate ion movement follows depolarization of the presynaptic membrane? A. Calcium enters through voltage-gated channels B. Calcium is expelled through newly opened channels C. Chloride is permanently…

Biologia IBPaper 1A, maj 2026, TZ3wzorowane1 pktzamkniętełatwe (szac.)

Zadanie 11

The schematic cross-section shows axons surrounded by concentric membrane layers. What function is associated with structure X? A. It provides insulation that permits faster impulse conduction along the axon B. It synthesizes neurotransmitter receptors in…

• Materiał graficzny

Biologia IBPaper 1B, maj 2025, TZ1wzorowane3 pktotwarteśrednie (szac.)

Zadanie 3a

(i) Describe the relationship shown. (ii) In a separate similar dataset, a fitted model gives R² = 0.89. Comment on this result.

• Materiał graficzny