Exam 11: Fundamentals of the Nervous System and Nervous Tissue

Which of the following correctly describes a graded potential?

Nerve impulses are sent to slow the heart's rate of contraction.The nerve fibers sending these signals will most likely belong to which division of the nervous system?

Which of the following is false or incorrect?

Figure 11.1 Using Figure 11.1, match the following: -Which is by far the most common neuron type?

Match the following: -Involved in control of rhythmic activities such as breathing.

Which of the following describes the excitatory postsynaptic potential?

Figure 11.2 Using Figure 11.2, match the following: -Ion channel.

During the relative refractory period of an action potential,a larger than normal stimulus is needed to cause another action potential.This is due to the fact that ________.

When a sensory neuron is excited by some form of energy,the resulting graded potential is called a(n)________.

In myelinated axons the voltage-regulated sodium channels are concentrated at the nodes of Ranvier.

Figure 11.1 Using Figure 11.1, match the following: -Which neuron is typically involved in the special senses of sight and smell?

Bacteria in the blood can be prevented entry to the fluids surrounding the brain.Which cells are most responsible for preventing bacteria from entering the fluids of the brain?

Neurons in the CNS are organized into functional groups.

Which of the following is true about the movement of ions across excitable living membranes?

A postsynaptic potential is a graded potential that is the result of a neurotransmitter released into the synapse between two neurons.

Figure 11.1 Using Figure 11.1, match the following: -In a reflex arc,which neuron has its cell body inside the spinal cord?

The concentration of ions in the chemical environment surrounding the neurons must be tightly regulated for neurons to function properly.Which of the following cells is most responsible for this?

When information is delivered within the CNS simultaneously by different parts of the neural pathway,the process is called ________ processing.

An inhibitory postsynaptic potential (IPSP)is associated with ________.

The effect of acetylcholine can be stimulating or inhibiting.Which of the following gives the best explanation for why this is so?