Question 1

Which histological technique is used for tract tracing?

Accepted Answer

Labeled pseudorabies virus is used for tract tracing as it can travel across synapses, allowing researchers to map neural pathways.

Question 2

The adult human brain contains

Accepted Answer

The adult human brain contains approximately 80-90 billion neurons, which are the fundamental units of the brain responsible for processing and transmitting information.

Question 3

The neuron doctrine

Accepted Answer

The neuron doctrine was confirmed using electron microscopy, proposed the existence of synaptic contacts, and stemmed from Ramón y Cajal's work.

Question 4

The "giant" axons of some invertebrate animals can have diameters as large as

Accepted Answer

The answer of The "giant" axons of some invertebrate animals...

Question 5

Which statement does not describe a reason that tract-tracing studies have been difficult to perform?

Accepted Answer

All the given reasons contribute to the difficulty of tract-tracing studies: fibers with different destinations traveling together, the small diameter of axons making them hard to see, and the similarity in appearance of axons from different sources.

Question 6

The size range of most nerve cell bodies is

Accepted Answer

Most nerve cell bodies typically range from 10 to 100 micrometers (μm) in size.

Question 7

The range of diameters of mammalian axons is

Accepted Answer

The answer of The range of diameters of mammalian axons...

Question 8

In which way(s) are dendrites and axons similar?

Accepted Answer

Both dendrites and axons are characterized by branching, which allows them to connect with other neurons and transmit signals.

Question 9

Dendrites are

Accepted Answer

Dendrites are the input zone of a nerve cell, receiving signals from other neurons.

Question 10

The "slow" rate of axonal transport is

Accepted Answer

The "slow" rate of axonal transport is typically less than 8 mm/day, which is much slower compared to the "fast" axonal transport rates.

Question 11

Which statement about dendritic spines is true?

Accepted Answer

The answer of Which statement about dendritic spines is true?
...

Question 12

Which statement about dendrites is false?

Accepted Answer

Dendrites are typically short, branched extensions of a neuron, and while they can vary in length, they do not reach several meters in length, even in large animals like giraffes.

Question 13

Substances are conveyed from the cell body of the neuron to the distant reaches of the axon through the process of

Accepted Answer

Axonal transport is the process by which substances are conveyed from the cell body of the neuron to the distant reaches of the axon.

Question 14

Although nerve cells typically have only one axon, an axon may divide into numerous axon

Accepted Answer

Axons can branch into multiple axon collaterals, which allow a single neuron to communicate with multiple target cells.

Question 15

Which neurons can collect the most information?

Accepted Answer

Multipolar neurons have multiple dendrites and one axon, allowing them to collect and integrate a large amount of information from various sources.

Question 16

Every neuron has all of these components except

Accepted Answer

The answer of Every neuron has all of these components...

Question 17

Most neurons

Accepted Answer

Most neurons in the human nervous system are interneurons, which connect other neurons within the brain and spinal cord and are involved in processing information.

Question 18

Synaptic vesicles are found in the

Accepted Answer

Synaptic vesicles are located in synaptic boutons, which are the terminal ends of axons where neurotransmitters are stored and released.

Question 19

Axon terminals form the _______ side of a synapse, and dendrites form the _______ side of a synapse.

Accepted Answer

Axon terminals are part of the presynaptic neuron, releasing neurotransmitters, while dendrites are part of the postsynaptic neuron, receiving signals.

Question 20

The gaps between segments of myelin are known as

Accepted Answer

The gaps between segments of myelin are known as nodes of Ranvier. These gaps allow for the saltatory conduction of action potentials along the axon.

Quiz 2: Functional Neuroanatomy: The Cells and Structures of the Nervous System