Question

question 16
0.5 points
simple columnar epithelium of the digestive tract is characterized by:
fibroblasts.
a rich vascular supply.
dense microvilli.
cilia.
clear selection
question 17
0.5 points
embryonic connective tissue that arises from mesoderm and produces essentially all types of connective tissues.
elastic cartilage
hyaline cartilage
mesenchyme
reticular tissue
clear selection
0.5 points
question 18
match the following characteristics to the tissues listed below: joined by junctions called intercalated discs.
last saved 11:46:13 pm

Explanation:

Question 16

• Fibroblasts are in connective tissue, not epithelium.
• Epithelial tissues (like simple columnar) are avascular, so no rich vascular supply.
• Simple columnar epithelium of the digestive tract has dense microvilli (to increase surface area for absorption).
• Cilia are more common in respiratory tract epithelium, not digestive.

• Elastic cartilage and hyaline cartilage are mature connective tissues, not embryonic.
• Reticular tissue is a type of connective tissue but not the embryonic one that gives rise to all connectives.
• Mesenchyme is embryonic connective tissue from mesoderm, producing all connective tissues.

Answer:

C. dense microvilli.

Question 17