Question

8- Which of the following can be activated by an inhibitory neurotransmiter on the postsynagtie a. Ligand-gated Na·Channels. b. Voltage-gated Na channels c. Voltage-gated K channels d. Voltage-gated CaChannels Ligand-gated CT channels. 9- Saltatory conduction occurs when a. Sodium ions levels are highest b. Gated-sodium channels open c. The resting potential fails to be reset d. There is no synapse and the axon is continuous with the next dendrite e. The action potential jumps from node to node on a myelinated axon 10-An electrical synapse is mediated by a. Adherens junctions b. Gap junctions c. Tight junctions. d. A neurotransmitter 11- Delta is a membrane-anchored signal molecule that interacts with its receptor (Notch) on the surface of a direct neighbor cell, this type of commuunication is an example of a. Autocrine signaling b. Paracrine signaling c. Endocrine signaling d. Neuronal signaling e. Contact-dependent signaling 12-Cancer cells often produce growth factors for which they also express the receptors, thus, the engage in a sort of signaling monolog called a. Autocrine signaling b. Paracrine signaling c. Endocrine signaling d. Neuronal signaling e. Contact-dependent signaling
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Question no-8 Answer is: D. Voltage-gated Ca2+ channels Explanation: Voltage-gated calcium (Ca2+) channels are key transducer

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