GR - The Nervous System - Neurons and Synapses II

GR - The Nervous System - Neurons and Synapses II - Guided...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Guided Reading - The Nervous System: Neurons and Synapses II 1. In a myelinated axon, Na + channels are A. along the whole length of the axon. B. every 5 mm. C. concentrated at the nodes of Ranvier. D. less numerous at the nodes of Ranvier. 2. Ion channels that open in response to depolarization are called A. ion-gated channels. B. voltage-gated channels. C. stimulation-gated channels. D. potential-gated channels. 3. Temporal summation A. occurs when a single neuron releases neurotransmitter rapidly. B. occurs because of the convergence of many neurons on a single postsynaptic cell. C. only involves excitatory postsynaptic potentials. D. only involves inhibitory postsynaptic potentials. 4. What is NOT true of the relative refractory period? A. Na+ channels are inactivated B. many Na+ channels are returning to a closed state C. K+ is moving out of the axon through its open channels D. a strong stimulus could cause a depolarization 5. Which of the following is NOT a functional classification of neurons? A. motor or efferent
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 4

GR - The Nervous System - Neurons and Synapses II - Guided...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online