anatomy

Question 1

The adult human brain contains

Answer 1

80‒90 billion neurons

Question 2

The range of diameters of mammalian axons is

Answer 2

0.2‒20𝜇m

Question 3

Dendrites are

Answer 3

the input zone of a nerve cell.

Question 4

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

Answer 4

collaterals

Question 5

Synaptic vesicles are found in the

Answer 5

synaptic boutons.

Question 6

Synaptic boutons are

Answer 6

swellings found at axon terminals

Question 7

Which type of cells give rise to brain tumors?

Answer 7

Glial cells

Question 8

Which cranial nerve carries both motor and sensory information?

Answer 8

Facial

Question 9

Fibers that carry information away from the brain are called _______, whereas fibers that carry information toward the brain are called _______.

Answer 9

efferents; afferents

Question 10

The major function of Schwann cells is the

Answer 10

myelination of peripheral nerve fibers.

Question 11

How many distinct layers are observed in the human neocortex?

Answer 11

Six

Question 12

In the cerebral cortex, layers V and VI are unique in that they

Answer 12

contains many neurons with large cell bodies

Question 13

The structures of the limbic system are critical in

Answer 13

emotion and learning.

Question 14

Which structure contains the reticular formation?

Answer 14

Mesencephalon

Question 15

Parallel fibers are a feature of the

Answer 15

cerebellum.

Question 16

Purkinje cells are located in the

Answer 16

cerebellum

Question 17

The specialized vascular tissue that produces the cerebrospinal fluid is called the

Answer 17

choroid plexus

Question 18

Which arteries provide blood to the brain?

Answer 18

Basilar artery, carotid artery, and vertebral artery

Question 19

Two important motor nuclei, the substantia nigra and the _______ nucleus, are contained within the _______.

Answer 19

red; midbrain