What are the answers to the following: Circle the term that does not belong in e

Question

What are the answers to the following:
Circle the term that does not belong in each of the following groupings. (note: Cl- = chloride ion K = potassium ion Na = sodium ion)

1. inside resting cell high Na low Na high K

2. high Cl- protein anions low Cl- cytoplasm of resting cell

3. Na - K pump 3 Na out/ 2 K in 3 Na in/ 2 K out ATP required

4. Nerve impulse graded potential short-distance signal short-lived signal

5. depolarization inside membrane less negative hyperpolarization -70mV to -50 mV

6. can generate action potentials axons peripheral processes cell bodies



For each of the following statements that is true write T. For false statements, correct the underlined word(s) by inserting the correct word(s).

1. the larger the diameter, the slower an axon conducts impulses

2. Almost all the gated calcium channels are concentrated at the nodes of Ranvier of myelinated axons

3. saltatory conduction is much faster than impulse propagation along unmyelinated membranes

4. Anesthetics block nerve impulses by blocking voltage-gated potassium channels

5. A post synaptic neuron conducts impulses toward the synapse

6. Chemically gated channels open when the membrane potential changes



Use the key choices to identify the types of synapses described below.

A. chemical synapse B electrical synapse

1. releases neurotransmitters from vesicles

2. very rapid transmission

3. protein channels connect cytoplasm of adjacent neurons

4. postsynaptic neuron has receptor region

Explanation / Answer

Na - K pump 3 Na out/ 2 K in 3 Na in/ 2 K out ATP required 3. saltatory conduction is much faster than impulse propagation along unmyelinated membranes 1. releases neurotransmitters from vesicles

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