Exercise 2-A:
Classification of Tissues
1. Name the three types of cells in the alveolus:
1. type I cell ; simple squamous epithelium
2. alveolar macrophage ; removes debris and microbes
3. surfactant - secreting cell (type II cell) ; secretes surfactant.
2. Proximal tubule: The simple cuboidal cells of the proximal tubule are called brush border cells because
they contain numerous microvilli. The microvilli increase the luminal membrane for reabsorption.
The proximal tubule cells are highly permeable to water and many solutes. The tight junctions permit the
movement of water between the cells.
3. List the four regions of the stomach:
1. Fundus
2. Body
3. Cardia
4. Pyloric region
4. List the three sheets of muscle in the stomach’s muscularis externa:
1. Longitudinal muscle layer
2. Circular muscle layer
3. Oblique muscle layer
5. Label the three sheets of muscle in the stomach’s muscularis externa in the diagram below.
Classification of Tissues
1. Name the three types of cells in the alveolus:
1. type I cell ; simple squamous epithelium
2. alveolar macrophage ; removes debris and microbes
3. surfactant - secreting cell (type II cell) ; secretes surfactant.
2. Proximal tubule: The simple cuboidal cells of the proximal tubule are called brush border cells because
they contain numerous microvilli. The microvilli increase the luminal membrane for reabsorption.
The proximal tubule cells are highly permeable to water and many solutes. The tight junctions permit the
movement of water between the cells.
3. List the four regions of the stomach:
1. Fundus
2. Body
3. Cardia
4. Pyloric region
4. List the three sheets of muscle in the stomach’s muscularis externa:
1. Longitudinal muscle layer
2. Circular muscle layer
3. Oblique muscle layer
5. Label the three sheets of muscle in the stomach’s muscularis externa in the diagram below.
