Question 1

Nervous tissue of the CNS that is composed primarily of myelinated axons is often referred to as ______ matter.

Accepted Answer

Myelinated axons in the central nervous system appear white due to the presence of myelin, which is a fatty substance, hence they are referred to as white matter.

Question 2

In order for local potentials to trigger an action potential, the membrane must reach a level called the ______.

Accepted Answer

The threshold is the critical level to which a membrane potential must be depolarized to initiate an action potential.

Question 3

Identify the correct sequence of information in a chemical synapse.

Accepted Answer

In a chemical synapse, the sequence is: the presynaptic terminal releases neurotransmitters into the synaptic cleft, which then bind to receptors on the postsynaptic membrane.

Question 4

Identify the type of synapse that includes a presynaptic cell, synaptic cleft, and postsynaptic cell.

Accepted Answer

Chemical synapses involve a presynaptic cell releasing neurotransmitters into a synaptic cleft, which then bind to receptors on a postsynaptic cell.

Question 5

The nervous system and the endocrine system are the major control systems of the body.

Accepted Answer

The nervous system and the endocrine system are the two major control systems of the body. The nervous system consists of the brain, spinal cord, and nerves that transmit signals throughout the body, while the endocrine system secretes hormones that regulate bodily functions. Together, these two systems work to maintain homeostasis and control the various functions of the body.

Question 6

When a neuron releases a neuromodulator that _____ the release of neurotransmitters from another neuron, this is called presynaptic facilitation.

Accepted Answer

Presynaptic facilitation occurs when a neuromodulator increases the release of neurotransmitters from another neuron, enhancing the signal transmission.

Question 7

Which type of circuit is associated with complex neuronal processes, such as solving mathematical equations?

Accepted Answer

Parallel after-discharge circuits are associated with complex neuronal processes because they involve multiple pathways that can process information simultaneously, allowing for complex computations like solving mathematical equations.

Question 8

Compounds classified as ______ alter synaptic transmission by changing neurotransmitter receptor numbers or affecting the breakdown and/or removal of neurotransmitter.

Accepted Answer

Neuromodulators alter synaptic transmission by changing neurotransmitter receptor numbers or affecting the breakdown and/or removal of neurotransmitters.

Question 9

The respiratory center of the brain (taking into account input from chemoreceptors, pulmonary stretch receptors and higher centers of the brain to determine respiratory output) is an example of a ______ circuit.

Accepted Answer

The respiratory center of the brain is an example of a converging circuit because it integrates multiple inputs from various sources (chemoreceptors, pulmonary stretch receptors, and higher brain centers) to produce a coordinated respiratory output.

Question 10

Synapses in which gap junctions allow ions to diffuse quickly from cell to cell are called ______ synapses.

Accepted Answer

Electrical synapses allow ions to diffuse quickly from cell to cell through gap junctions.

Question 11

When a neuron releases a neuromodulator that _____ the release of neurotransmitters from another neuron, this is called presynaptic facilitation.

Accepted Answer

Presynaptic facilitation occurs when a neuron releases a neuromodulator that enhances or facilitates the release of neurotransmitters from another neuron, increasing the likelihood of signal transmission.

Quiz 11: Functional Organization of Nervous Tissue

Nervous tissue of the CNS that is composed primarily of myelinated axons is often referred to as ______ matter.

In order for local potentials to trigger an action potential, the membrane must reach a level called the ______.

Identify the correct sequence of information in a chemical synapse.

Identify the type of synapse that includes a presynaptic cell, synaptic cleft, and postsynaptic cell.

The nervous system and the endocrine system are the major control systems of the body.

When a neuron releases a neuromodulator that _____ the release of neurotransmitters from another neuron, this is called presynaptic facilitation.

Which type of circuit is associated with complex neuronal processes, such as solving mathematical equations?

Compounds classified as ______ alter synaptic transmission by changing neurotransmitter receptor numbers or affecting the breakdown and/or removal of neurotransmitter.

The respiratory center of the brain (taking into account input from chemoreceptors, pulmonary stretch receptors and higher centers of the brain to determine respiratory output) is an example of a ______ circuit.

Synapses in which gap junctions allow ions to diffuse quickly from cell to cell are called ______ synapses.

When a neuron releases a neuromodulator that _____ the release of neurotransmitters from another neuron, this is called presynaptic facilitation.