17 Questions
What is the main function of archaeocytes in sponges?
Secrete support elements in mesohyl layer
Which cells are responsible for secreting spicules in sponges?
Sclerocytes
What is the main function of spongocytes in sponges?
Secrete fibers composed of spongin
What do totipotent cells refer to?
Cells that can differentiate into any other specialized cell
Which cells may arise through morphological modification of existing choanocytes?
Archaeocytes
What is the significance of spicules and fibers in sponges?
Species identification for sponges
What is the role of gemmules in sponges?
Asexual reproduction
How long can gemmules stay dormant and still hatch successfully?
25 years
During unfavorable conditions, what happens to some freshwater and marine sponges instead of forming gemmules?
Tissue regression
What is the outer, epithelial-like layer of most sponges called?
Pinacoderm
Which type of sponge canal system is the most complex and efficient?
Leuconoid
What is the function of pinacocytes in sponges related to water flow?
Shape changes regulation
What is the term used to describe cells that can differentiate into cells from all three germ layers?
Totipotent
What is the primary function of collencytes and lophocytes in cell differentiation?
Secrete collagen
What are gemmules and what distinguishes them from other sponge structures?
Dormant structures resistant to vernalization
During gemmule formation, what is the role of archaeocytes?
Accumulate nutrients by phagocytosis
What is the function of the thick, protective covering secreted around clusters of archaeocytes during gemmule formation?
Provide structural support
Test your knowledge on archaeocytes, versatile amorphous amoeboid cells in sponges responsible for intracellular digestion, storing food, and potential role in reproduction and waste elimination. Learn about the support elements they secrete in the mesohyl layer.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
