Question 1

Myelin around axons:

Accepted Answer

A)   speeds up transmission of information.
B)   slows down transmission as if by an insulator.
C)   has no effect on speed of transmission but acts as a protective coat on the fragile axon.
D)   has no effect on speed of transmission but allows the cell access to nutrition.

Question 2

The simplest neuron is a(n) :

Accepted Answer

A)   somatosensory neuron.
B)   motor neuron.
C)   bipolar neuron.
D)   interneuron.

Question 3

The notion that two individuals with the exact same genes could end up developing differently is explained by:

Accepted Answer

A)   phenotypic plasticity.
B)   codominance.
C)   genetic mutation.
D)   recessive alleles.

Question 4

A chain of amino acids forms a:

Accepted Answer

A)   protein.
B)   carboxyl group.
C)   peptide bond.
D)   carbohydrate. A

Question 5

Which three elements constitute more than 90% of a cell?

Accepted Answer

A)   oxygen,potassium,sodium
B)   oxygen,hydrogen,sodium
C)   oxygen,hydrogen,carbon
D)   carbon,hydrogen,sodium

Question 6

The blood-brain barrier is made up of _____ attached to neurons and blood vessels.

Accepted Answer

A)   astrocytes
B)   microglia
C)   Schwann cells
D)   ependymal cells A

Question 7

The concordance rates in identical twins for diseases like Alzheimer,schizophrenia,and multiple sclerosis is:

Accepted Answer

A)   100%.
B)   25%.
C)   between 90% and 100%.
D)   between 30% and 60%.

Question 8

Astroglia are NOT associated with:

Accepted Answer

A)   expansion of blood vessels.
B)   the blood-brain barrier.
C)   formation of scar tissue.
D)   removal of dead tissue.

Question 9

The human central nervous system consists of approximately:

Accepted Answer

A)   86 billion neurons.
B)   1 trillion neurons.
C)   16 billion neurons.
D)   1 million neurons.

Question 10

DNA is composed of four nucleotide bases.Which one of the following is NOT a nucleotide base?

Accepted Answer

A)   thymine
B)   adenine
C)   histamine
D)   cytosine C

Question 11

Interneurons:

Accepted Answer

A)   produce glial cells in the midbrain.
B)   are responsible for producing myelin sheets.
C)   are involved in processing sensory information and sending information to the motor neurons.
D)   are involved in processing motor feedback.

Question 12

One method that could be used to produce new tissue or organs for transplant to the original donor is:

Accepted Answer

A)   cloning.
B)   gene transfer.
C)   knock-in technique.
D)   selective breeding.

Question 13

The place in a cell where protein packages are wrapped and shipped is called:

Accepted Answer

A)   endoplasmic reticulum.
B)   mitochondrion.
C)   Golgi body.
D)   lysosome.

Question 14

Cell wastes are handled by:

Accepted Answer

A)   Golgi bodies.
B)   lysosomes.
C)   microtubules.
D)   endoplasmic reticulum.

Question 15

_____ are branches extending out of a neuron's cell membrane that allow it to collect information from other cells.

Accepted Answer

A)   Somas
B)   Axons
C)   Terminal buttons
D)   Dendrites

Question 16

Stellate cells are:

Accepted Answer

A)   sensory neurons.
B)   interneurons.
C)   motor neurons.
D)   not affected by either sensory input or motor output.

Question 17

The nucleotide sequence MOST common in a population is called the:

Accepted Answer

A)   homozygous allele.
B)   heterozygous allele.
C)   wild-type allele.
D)   mutant allele.

Question 18

Golgi staining makes use of _____ to stain neurons so they can be viewed under a microscope.

Accepted Answer

A)   cresyl violet
B)   silver nitrate
C)   pen ink
D)   squid ink

Question 19

The _____ is the core region of the cell that contains the nucleus.

Accepted Answer

A)   dendrite
B)   axon
C)   Golgi body
D)   soma

Question 20

Which of the following is NOT one of the ways in which epigenetic mechanisms can influence the expression of a particular gene?

Accepted Answer

A)   ribosome modification
B)   histone modification
C)   DNA modification
D)   mRNA modification

Exam 3:What Are the Nervous System's Functional Units? Part C

Myelin around axons:

Correct AnswerverifiedShow Answer

The simplest neuron is a(n) :

Correct AnswerverifiedShow Answer

The notion that two individuals with the exact same genes could end up developing differently is explained by:

Correct AnswerverifiedShow Answer

A chain of amino acids forms a:

Correct AnswerverifiedA

Which three elements constitute more than 90% of a cell?

Correct AnswerverifiedShow Answer

The blood-brain barrier is made up of _____ attached to neurons and blood vessels.

Correct AnswerverifiedA

The concordance rates in identical twins for diseases like Alzheimer,schizophrenia,and multiple sclerosis is:

Correct AnswerverifiedShow Answer

Astroglia are NOT associated with:

Correct AnswerverifiedShow Answer

The human central nervous system consists of approximately:

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DNA is composed of four nucleotide bases.Which one of the following is NOT a nucleotide base?

Correct AnswerverifiedC

Interneurons:

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One method that could be used to produce new tissue or organs for transplant to the original donor is:

Correct AnswerverifiedShow Answer

The place in a cell where protein packages are wrapped and shipped is called:

Correct AnswerverifiedShow Answer

Cell wastes are handled by:

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_____ are branches extending out of a neuron's cell membrane that allow it to collect information from other cells.

Correct AnswerverifiedShow Answer

Stellate cells are:

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The nucleotide sequence MOST common in a population is called the:

Correct AnswerverifiedShow Answer

Golgi staining makes use of _____ to stain neurons so they can be viewed under a microscope.

Correct AnswerverifiedShow Answer

The _____ is the core region of the cell that contains the nucleus.

Correct AnswerverifiedShow Answer

Which of the following is NOT one of the ways in which epigenetic mechanisms can influence the expression of a particular gene?

Correct AnswerverifiedShow Answer

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