Exam 43: Control of Animal Processes: Neural Control

Which of the following is common to all vertebrates?

What organic macromolecules allow myelinated sheaths to act as electrical insulators?

What would be disrupted if the K⁺ channels of an excitable plasma membrane were blocked by the action of a drug?

Which sequence places the components of a neural signalling pathway in the correct order, from beginning to end?

Direct neurotransmitters bind to G protein-coupled receptors.

Depolarization occurs due to the diffusion of K⁺ across a neuron plasma membrane.

What will be caused in the postsynaptic membrane by the binding of a neurotransmitter to ligand-gated Cl- channels?

For which axon might you expect action potential propagation to be the fastest?

Match each situation to the most appropriate term. -occurs in a postsynaptic membrane when ligand-gated Na⁺ channels open

-In the chemical synapse in the figure, which structure represents the synaptic cleft?

At which of the following neuron locations does summation occur?

Match each term with its description. -graded potential

Which term refers to the component of a neural signalling pathway in which messages are sorted and interpreted?

Match each term with its definition. -nerve net

Which structures are used by electrical synapses during signal transmission?

During an action potential, what level can the membrane potential reach?

Match each situation to the most appropriate term. -is the phase of an action potential when the membrane potential becomes more positive

Why does depolarization of the neuron plasma membrane occur?

-When comparing electrical synapses and chemical synapses in the figure, what structures are found only in electrical synapses?

Which of the following conduct(s) electrical signals away from the cell body of a neuron?