Cardiovascular Development Quiz

Which of the following structures contributes MOST significantly to the formation of the atrioventricular septum?

• Neural crest cells

• Primary cardiac muscle cells

• Endocardial cushions derived from endothelial cells

• Smooth muscle cells from the developing aorta

In which of the primary germ layers the development of the heart occurs?

• mesoderm

• ectoderm

• endoderm

What are the 5 regions of the heart tube?

• pulmonary trunk, truncus arteriosus, aorta, left ventricle and right ventricle

• truncus arteriosus, SA node, coronary sinus, bulbus cordis and primitive atrium

• truncus arteriosus, bulbus cordis, primitive ventricle, primitive atrium and sinus venosus.

Which of the following structures contributes MOST significantly to the formation of the atrioventricular septum?

• Neural crest cells

• Primary cardiac muscle cells

• Endocardial cushions derived from endothelial cells

• Smooth muscle cells from the developing aorta

Which days does septation occur?

• day 17-27

• day 27 - 37

• day 37-47

• day 47-57

What causes the expression of NKX2.5?

• BMP activity and WNT inhibition by crescent and cerebrus

• BMP inhibition and WNT activity by crescent and cerebrus

• Activity of WNT

• inhibitors crescent and cerebrus of WNT protein

The distal portion of the heart tube is the _____ and is the precursor for the ___________ tracts.,

• bulbus cordis, trabeculated

• truncus arteriosus, ventricular outflow

• conus cordis, ventricular outflow

• conus cordis, arterial outflow

Which week of gestation does the foundation of the conducting system start developing relative to the heart tube?

• week 1-2

• week 7-8

• week 5-6

• week 3-4

When the heart first starts forming in a baby's development, what kind of messages help the cells know what to become?

• signaling molecules

• Transcription factors

• Electrical activity

Which structure in the developing heart gives rise to the sinoatrial (SA) node, the pacemaker of the heart?

• Neural crest cells

• Secondary heart field

• Endocardial cushions

• Myocardial trabeculae