Test Bank Docx Body Plan Chick & Mouse Chapter 5

Type: multiple choice question

Title: Chapter 05 - Question 01

01) What determines the orientation of the antero-posterior axis in the epiblast of a chick embryo?

a. A random process

b. Interaction with the surrounding albumin

c. Gravity effects on the embryo

d. It is oriented away from the site of sperm entry

Type: multiple choice question

Title: Chapter 05 - Question 02

02) Which of the options given is the Nieuwkoop center analog in the chick embryo?

a. Anterior marginal zone

b. Posterior marginal zone

c. Area pellucida

d. Area opaca

Type: multiple choice question

Title: Chapter 05 - Question 03

03) Which of the following is not true of the trophectoderm?

a. Cells on the morula’s periphery tend to become trophectoderm

b. Formation of the trophectoderm is the first differentiation event in mammalian embryonic development

c. The transcription factor Oct4 promotes trophectoderm formation

d. Mouse chimeras have been used to study trophectoderm specification

Type: multiple choice question

Title: Chapter 05 - Question 04

04) What is the result of Gata6 expression within the inner cell mass?

a. Cells differentiate into a layer of primitive endoderm

b. Cells differentiate into trophoblasts

c. Cells differentiate into epiblast

d. Cells revert back to a more pluripotent state

Type: multiple choice question

Title: Chapter 05 - Question 05

05) What is another way of referring to the paraxial mesoderm?

a. Intermediate mesoderm

b. Somitic mesoderm

c. Lateral plate mesoderm

d. Notochord

Type: multiple choice question

Title: Chapter 05 - Question 06

06) What is the signaling protein responsible for initiating neural tissue induction in the chick embryo?

a. FGF

b. BMP

c. Chordin

d. Cerberus

Type: multiple choice question

Title: Chapter 05 - Question 07

07) Which of the following is not true of somites?

a. Somites give rise to bone, cartilage, and muscle of the body axis

b. Two somites form simultaneously

c. Somites form rhythmically from posterior to anterior

d. Somites are formed from mesoderm adjacent to the neural tube

Type: multiple choice question

Title: Chapter 05 - Question 08

08) What does the “clock and wavefront” model propose?

a. Cells must undergo a specific number of oscillations of gene activity in order to form a somite

b. Cells must be passed by the wavefront to commit to forming a somite

c. Cells must not have yet been passed by the wavefront to commit to forming a somite

d. Genes that position a wavefront have clock-like gene expression

Type: multiple choice question

Title: Chapter 05 - Question 09

09) Which of the following genes determines the identity of somites in mouse and chick embryos and can be disrupted in order to induce transformations or antero-posterior shifts in vertebral fate?

a. Hox

b. BMP

c. Fgf

d. Notch

Type: multiple choice question

Title: Chapter 05 - Question 10

10) The sclerotome region of a somite gives rise to vertebrae and ribs. From which tissues does the sclerotome receive signals to direct these fates?

a. Lateral plate mesoderm

b. Notochord and floor plate

c. Roof plate and overlying ectoderm

d. Endoderm