[6] B6d Neurons – 12June 1c (c) Damage to the fatty sheath around neurons leading to and from the eye can cause vision problems. Complete the sentences to explain this. The trial sheath surrounds the .......................................... of a neuron. Neurons in the optic nerve that have lost their fatty sheath will transmit nerve impulses more .......................................... . This could cause vision problems. [1] B6ei Synapses – 13Jan 5a/b The human brain has billions of neurons. Impulses are transmitted across synapses in the brain. (a) Identify two features of synapses to explain how impulses travel in only one direction between adjacent neurons. (b) Ecstasy is a drug. Complete the sentences about Ecstasy and the brain. Use words from the list. Each word can be used once, more than once or not at all. blocks decreases increases trial produced
[6] B6d – Neurons 12June 1c (c) Damage to the fatty sheath around neurons leading to and from the eye can cause vision problems. Complete the sentences to explain this. The sheath surrounds the .......................................... of a neuron. Neurons in the optic nerve that have lost their fatty sheath will transmit nerve impulses more .......................................... . This could cause vision problems. [1] B6ei – Synapses 13Jan 5a/b The human brain has billions of neurons. Impulses are transmitted across synapses in the brain. (a) Identify two features of synapses to explain how impulses travel in only one direction between adjacent neurons. (b) Ecstasy is a drug. Complete the sentences about Ecstasy and the brain. Use words from the list. Each word can be used once, more than once or not at all. blocks decreases increases produced trial trial
B6-Brain-and-Mind.docx