Quizzizz - Chapter 12

Write True or False: The regeneration tube guides the growth of a new axon from the proximal area across the injured area to the distal area where it replaces the original axon.

What factors contribute to a lack of neurogenesis in most parts of the brain?

• B) Absence of growth stimulating cues present during fetal development.

• Both A and B

• A) Inhibitory influences from neuroglia.

• C) Lack of appropriate neurotransmitters.

A which of the following statements is/are incorrect?

• Parallel after discharge circuits may be involved in short term memory.

• A diverging circuit would amplify a signal.

• In a converging circuit, the postsynaptic neuron receives nerve impulses from several different sources.

• Breathing is thought to be an example of a reverberating circuit.

Write True or False: Neural circuits are functional groups of neurons that process specific types of information.

Nitric acid is synthesized on demand and has a very brief action period. It quickly diffuses from the cell that produced it to other cells where it activates an enzyme necessary for production of a second messenger.

Which of the following statement is/are incorrect?

• Glutamate and aspartate have excitatory effects.

• Biogenic amines may be excitatory or inhibitory depending upon the type of metabotropic receptor that they bind to.

• Gamma amino butyric acid and glycine are excitatory neurotransmitters.

• ATP is an excitatory neurotransmitter.

• Acetylcholine may be excitatory or inhibitory depending upon the type of receptor it binds to.

Write True or False: An inhibitory post synaptic potential will bring a membrane closer to threshold but normally does not initiate a nerve impulse.

Write True or False: An excitatory postsynaptic potential depolarizes the membrane while an inhibitory post synaptic potential hyperpolarizes it.

How are neurotransmitters removed from the synaptic cleft?

• Uptake by cells

• All of these

• Diffusion

• Enzymatic degradation

Write True or False: Myelination reduces the speed of propagation of an action potential.