Question 1

Refer to the figure.
 About how old is this embryo, assuming normal development, based on the figure?

Accepted Answer

A)  18 days 
B)  20 days 
C)  22 days 
D)  24 days

Question 2

The loss of the distal part of an axon after injury is known as _______.

Accepted Answer

The answer of The loss of the distal part of...

Question 3

Discuss the observations that would likely result from microscopic examination of cortical tissue samples from an Alzheimer's patient.

Accepted Answer

The answer of Discuss the observations that would likely result...

Question 4

Explain the process of site-directed mutagenesis. What are the advantages and disadvantages to such a process?

Accepted Answer

The answer of Explain the process of site-directed mutagenesis. What...

Question 5

PKU is a hereditary disorder that involves faulty metabolism of

Accepted Answer

A)  sugar. 
B)  alcohol. 
C)  lipid. 
D)  protein.

Question 6

When a neuron dies, a surviving neuron that once received inputs from that cell loses some of its dendrites by a process called

Accepted Answer

A)  Wallerian degeneration. 
B)  transneuronal degeneration. 
C)  retrograde degeneration. 
D)  sprouting.

Question 7

Explain how newly born cells are guided from their point of origin to their final destinations in the nervous system.

Accepted Answer

The answer of Explain how newly born cells are guided...

Question 8

In Rett syndrome, the mutation appears to be located in

Accepted Answer

A)  all glial cells. 
B)  red blood cells. 
C)  bone marrow cells that stay in the bloodstream. 
D)  microglia.

Question 9

The interior of the neural tube eventually develops into the _______ zone.

Accepted Answer

The answer of The interior of the neural tube eventually...

Question 10

Migrating neurons are guided during migration by

Accepted Answer

A)  astrocytes. 
B)  oligodendrocytes. 
C)  Schwann cells. 
D)  radial glia.

Question 11

Using an example, discuss how experiences other than visual stimuli can affect neural development.

Accepted Answer

The answer of Using an example, discuss how experiences other...

Question 12

Describe the order of myelination in the central nervous system; also discuss the benefits of myelin and a problem that may arise if myelination is lost.

Accepted Answer

The answer of Describe the order of myelination in the...

Question 13

The sum of all the physical characteristics that an individual displays at one point in time is its

Accepted Answer

A)  genotype. 
B)  congenital state. 
C)  phenotype. 
D)  chromotype.

Question 14

After migrating to their new positions, newly born cells undergo _______.

Accepted Answer

The answer of After migrating to their new positions, newly...

Question 15

Rodent pups with an inattentive mother secrete an abnormally high amount of glucocorticoids in response to stress. In terms of epigenetics, this response is due to

Accepted Answer

A)  methylation of glucocorticoids. 
B)  methylation of the gene for the glucocorticoid receptor. 
C)  decreased glucocorticoid expression. 
D)  inactivation of stress genes.

Question 16

In neurons undergoing apoptosis, DNA is cut up by

Accepted Answer

A)  caspases. 
B)  IAPs. 
C)  Diablo. 
D)  death genes.

Question 17

Describe the cellular processes associated with apoptosis.

Accepted Answer

The answer of Describe the cellular processes associated with apoptosis....

Question 18

NGF and BDNF are members of which chemical family?

Accepted Answer

A)  Death gene proteins 
B)  Phenylketones 
C)  Adhesion molecules 
D)  Neurotrophins

Question 19

Provide a synopsis of the development of the human central nervous system from its earliest distinguishable point to about the time the embryo becomes a fetus.

Accepted Answer

The answer of Provide a synopsis of the development of...

Question 20

Write a coherent and informative paragraph incorporating each of the following terms or concepts: Diablo; apoptosis; IAPs; caspases; DNA

Accepted Answer

The answer of Write a coherent and informative paragraph incorporating...

Exam 7: Life-Span Development of the Brain and Behavior

Refer to the figure. About how old is this embryo, assuming normal development, based on the figure?