Podcast
Questions and Answers
Which of the following describes the term 'Apical'?
Which of the following describes the term 'Apical'?
- Middle
- Along the sides
- At the tip (correct)
- Bottom
What does 'Basal' refer to?
What does 'Basal' refer to?
- Tip
- Along the sides
- Base (correct)
- Uppermost part
Which structure is specifically associated with a 'Half connection'?
Which structure is specifically associated with a 'Half connection'?
- Adhering Junctions
- Tight Junctions
- Hemidesmosomes (correct)
- Desmosomes
What are Flagella primarily responsible for in sperm cells?
What are Flagella primarily responsible for in sperm cells?
Microvilli can be found on the exposed surface of epithelial cells in the small intestine.
Microvilli can be found on the exposed surface of epithelial cells in the small intestine.
Match the following cell structures with their functions:
Match the following cell structures with their functions:
Define the function of Desmosomes.
Define the function of Desmosomes.
What is the primary role of Cilia in the bronchus?
What is the primary role of Cilia in the bronchus?
Entamoeba histolytica is an anaerobic parasitic amoebozoan, predominantly infecting __________.
Entamoeba histolytica is an anaerobic parasitic amoebozoan, predominantly infecting __________.
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Study Notes
Cell Modifications Overview
- Apical surfaces refer to the top or tip of epithelial cells, involved in absorption and secretion.
- Basal surfaces represent the bottom of epithelial cells, where they attach to the underlying tissue.
- Lateral surfaces are located along the sides of epithelial cells, facilitating intercellular communication.
Cellular Extensions
- Cilia: Hair-like structures found in the bronchus and oviduct, aiding in movement of substances across epithelial surfaces.
- Flagella: A tail-like structure seen in sperm cells, crucial for motility.
- Microvilli: Finger-like projections present on the epithelial cells of the small intestine, increasing surface area for absorption.
Cell Structures and Functions
- Desmosomes: Provide strong adhesion, connecting intermediate filaments between two cells, allowing tissues to endure mechanical stress.
- Hemidesmosomes: Anchor cells to the extracellular matrix, specifically connecting to the basal lamina to stabilize tissues.
- Tight Junctions: Create a watertight seal, preventing molecule passage between cells.
- Adhering Junctions: Bind cells together, maintaining tissue integrity.
- Gap Junctions: Facilitate communication between adjacent cells by allowing the passage of signals.
Diseases and Organisms
- Entamoeba histolytica: An anaerobic parasitic amoeba that infects humans and primates, causing amoebiasis, a disease associated with gastrointestinal disturbances.
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