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Exocrine glands are classified as either unicellular or multicellular. Unicellular glands are individual cells which are scattered throughout an epithelial lining. Goblet cells are an example of a unicellular gland type found extensively in the mucous membranes of the small and large intestine.
In the space below, draw and color an example of how multicellular organisms are organized (many cells create tissues, many tissues create organs, many organs create systems).
Cells, Tissues and Organs Homework Exercise 1 Q.1. Cells within the human body can be described as ‘specialised’, explain what this term means. (1) Q.2. The diagrams below contain examples of specialised cells. Match each of the diagrams to the correct description of their function. a (3) Q.3.
A gland is a single cell or a multicellular structure that secretes substances onto a surface, into a cavity, or into the blood. A.Match these terms with the Endocrine correct statement or definition: Exocrine 1. Glands with a duct (e.g., sweat glands). 2. Glands with no duct; secrete hormones (e.g. pituitary gland).
1. Tight junction‐fuse adjacent membranes 2. Gap junction‐protein tunnel; allows substances to pass between adjacent cells 3. Desmosomes‐connects adjacent cell membranes; allows tissue to stretch 4. Hemidesmosomes‐anchor basal surface to basement membrane
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The multicellular exocrine glands known as serous glands develop from simple epithelium to form a secretory surface that secretes directly into an inner cavity. These glands line the internal cavities of the abdomen and chest and release their secretions directly into the cavities.
