Exam Prep | Ch7 – Morphogenesis: Change In Form In The Early

Type: multiple choice question

Title: Chapter 07 - Question 01

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

a. Cadherins

b. CAMs

c. Integrins

d. Laminins

Type: multiple choice question

Title: Chapter 07 - Question 02

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

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.

Type: multiple choice question

Title: Chapter 07 - Question 03

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

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.

Type: multiple choice question

Title: Chapter 07 - Question 04

04) 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?

a. Asymmetric division

b. Symmetric division

c. Radial division

d. Spiral division

Type: multiple choice question

Title: Chapter 07 - Question 05

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

a. Sodium

b. Osmosis

c. Tight junctions

d. Apoptosis

Type: multiple choice question

Title: Chapter 07 - Question 06

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

a. Inhibition of myosin motor activity

b. Activation of Snail protein

c. Endocytosis of cadherins

d. Asymmetric actin-based contraction

Type: multiple choice question

Title: Chapter 07 - Question 07

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

a. Delamination

b. Involution

c. Epiboly

d. Convergent extension

Type: multiple choice question

Title: Chapter 07 - Question 08

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

a. Ingression

b. Involution

c. Epiboly

d. Convergent extension

Type: multiple choice question

Title: Chapter 07 - Question 09

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

a. Neural fold

b. Neural crest

c. Neural furrow

d. Neural groove

Type: multiple choice question

Title: Chapter 07 - Question 10

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

a. Rachischisis

b. Craniorachischisis

c. Anencephaly

d. Spina bifida