Question 1

Which of these statements is true of cells moving through the primitive streak of a chick or a mouse embryo?

Accepted Answer

A)  Cells become mesenchymal in nature. 
B)  Cells maintain their epithelial nature. 
C)  Cells strengthen adherens junction complexes. 
D)  Cells maintain their tightly packed organization. 
A)  Cells become mesenchymal in nature. 
B)  Cells maintain their epithelial nature. 
C)  Cells strengthen adherens junction complexes. 
D)  Cells maintain their tightly packed organization. A

Question 2

Which of the following results from a failure to close the neural tube in the fore- and midbrain regions?

Accepted Answer

A)  Rachischisis 
B)  Craniorachischisis 
C)  Anencephaly 
D)  Spina bifida 
A)  Rachischisis 
B)  Craniorachischisis 
C)  Anencephaly 
D)  Spina bifida C

Question 3

Which of the following does not play a role in the formation of a blastocoel?

Accepted Answer

A)  Sodium 
B)  Osmosis 
C)  Tight junctions 
D)  Apoptosis 
A)  Sodium 
B)  Osmosis 
C)  Tight junctions 
D)  Apoptosis D

Question 4

Which of the following is not associated with the differential adhesion hypothesis?

Accepted Answer

A)  Cells sort according to differences in adhesiveness and surface tension 
B)  Cells sort similarly to molecules of two immiscible liquids 
C)  Cells sort according to the types and numbers of cell-adhesion molecules 
D)  Cell sorting recapitulates the final positions of cell layers in the normal embryo. 
A)  Cells sort according to differences in adhesiveness and surface tension 
B)  Cells sort similarly to molecules of two immiscible liquids 
C)  Cells sort according to the types and numbers of cell-adhesion molecules 
D)  Cell sorting recapitulates the final positions of cell layers in the normal embryo.

Question 5

What is the family of cell-adhesion molecules that require calcium to adhere to the same molecules on another cell?

Accepted Answer

A)  Cadherins 
B)  CAMs 
C)  Integrins 
D)  Laminins 
A)  Cadherins 
B)  CAMs 
C)  Integrins 
D)  Laminins

Question 6

What is the ectodermal interface between non-neural ectoderm and the neural plate during neurulation called?

Accepted Answer

A)  Neural fold 
B)  Neural crest 
C)  Neural furrow 
D)  Neural groove 
A)  Neural fold 
B)  Neural crest 
C)  Neural furrow 
D)  Neural groove

Question 7

Which of the following cell movements involves remodeling of intercellular junctions to guide medio-lateral intercalation?

Accepted Answer

A)  Delamination 
B)  Involution 
C)  Epiboly 
D)  Convergent extension 
A)  Delamination 
B)  Involution 
C)  Epiboly 
D)  Convergent extension

Question 8

What is the subcellular event that provides the force required for puckering the epithelium during invagination?

Accepted Answer

A)  Inhibition of myosin motor activity 
B)  Activation of Snail protein 
C)  Endocytosis of cadherins 
D)  Asymmetric actin-based contraction 
A)  Inhibition of myosin motor activity 
B)  Activation of Snail protein 
C)  Endocytosis of cadherins 
D)  Asymmetric actin-based contraction

Question 9

Which of the following embryonic cell movements involves the separation of cells from a continuous sheet of cells?

Accepted Answer

A)  Ingression 
B)  Involution 
C)  Epiboly 
D)  Convergent extension 
A)  Ingression 
B)  Involution 
C)  Epiboly 
D)  Convergent extension

Question 10

The first cleavage event in a C. elegans embryo gives rise to two differently sized cells with different content and fates. What is this type of cell division called?

Accepted Answer

A)  Asymmetric division 
B)  Symmetric division 
C)  Radial division 
D)  Spiral division 
A)  Asymmetric division 
B)  Symmetric division 
C)  Radial division 
D)  Spiral division

Which of these statements is true of cells moving through the primitive streak of a chick or a mouse embryo?

Which of the following results from a failure to close the neural tube in the fore- and midbrain regions?

Which of the following does not play a role in the formation of a blastocoel?

Which of the following is not associated with the differential adhesion hypothesis?

What is the family of cell-adhesion molecules that require calcium to adhere to the same molecules on another cell?

What is the ectodermal interface between non-neural ectoderm and the neural plate during neurulation called?

Which of the following cell movements involves remodeling of intercellular junctions to guide medio-lateral intercalation?

What is the subcellular event that provides the force required for puckering the epithelium during invagination?

Which of the following embryonic cell movements involves the separation of cells from a continuous sheet of cells?

The first cleavage event in a C. elegans embryo gives rise to two differently sized cells with different content and fates. What is this type of cell division called?

History and Basic Concepts

Drosophila Life Cycle and Development of the Body Plan

Vertebrate Life Cycles, Experimental Techniques Human Development

Laying Down the Vertebrate Body Plan: Xenopus and Zebrafish

Laying Down and Completing the Vertebrate Body Plan: Chick and Mouse

Cell Differentiation Stem Cells

Germ Cells, Fertilization Sex

Organogenesis

Development of the Nervous System

Growth, Post-Embryonic Development and Regeneration

Plant Life Cycle and Development

Evolution and Development

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Exam 7: Morphogenesis: Change in Form in the Early Embryo

Which of these statements is true of cells moving through the primitive streak of a chick or a mouse embryo?

Which of the following results from a failure to close the neural tube in the fore- and midbrain regions?

Which of the following does not play a role in the formation of a blastocoel?

Which of the following is not associated with the differential adhesion hypothesis?

What is the family of cell-adhesion molecules that require calcium to adhere to the same molecules on another cell?

What is the ectodermal interface between non-neural ectoderm and the neural plate during neurulation called?

Which of the following cell movements involves remodeling of intercellular junctions to guide medio-lateral intercalation?

What is the subcellular event that provides the force required for puckering the epithelium during invagination?

Which of the following embryonic cell movements involves the separation of cells from a continuous sheet of cells?

The first cleavage event in a C. elegans embryo gives rise to two differently sized cells with different content and fates. What is this type of cell division called?

History and Basic Concepts

Drosophila Life Cycle and Development of the Body Plan

Vertebrate Life Cycles, Experimental Techniques Human Development

Laying Down the Vertebrate Body Plan: Xenopus and Zebrafish

Laying Down and Completing the Vertebrate Body Plan: Chick and Mouse

Cell Differentiation Stem Cells

Germ Cells, Fertilization Sex

Organogenesis

Development of the Nervous System

Growth, Post-Embryonic Development and Regeneration

Plant Life Cycle and Development

Evolution and Development

Filters