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BIOL-3160 Lecture Notes - Lecture 4: Salivary Gland, Connexon, Desmosome

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raspberryskunk140

22 Sep 2017

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Clemson University

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Document Summary

Tissues are formed from three primary germ layers. Cells bound closely together by different junctions. Minimal amount of extracellular matrix is in between cells. Apical surface (exposed to the environment or some internal space) All have basal surface where epithelium is attached to underlying ct. At base of epithelial surface it is bound to a thin basement membrane. This membrane is produced by epithelium and ct. Richly inverted to detect changes in the environment. Most nervous tissue is in the underlying ct. Frequently damaged because they are exposed to the surface so their regeneration rate is high to deal with lost or damaged cells. All substances that enter/exit body must pass through epithelium. Innervated by nerve endings to detect changes in external surfaces. Nerve endings and nerves in ct supply info to body. The two laminae contain collagen fibers as well as specific proteins/carbs. All of these strengthen the membrane and form selectively permeable membrane.

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Related Questions

!) Connective tissues:
A) are made primarily of extracellular matrix.
B) arise from different types embryonic tissue; connective tissuestherefore have little
relationship or kinship to one another.
C) are delicate tissues, not designed to bear weight or withstandabrasion or tension.
D) are never vascularized.

2) Which of the following is incorrectly matched?
A) Stratified squamous epithelia: found in areas subjected to wearand tear
B) Simple cuboidal epithelia: found in areas that stretch
C) Simple columnar epithelia: associated with absorption andsecretion
D) Simple squamous epithelia: associated with filtration andexchange

3) Select the true statement.
A) Loose connective tissue includes cartilage.
B) Dense connective tissue is often called fibrous connectivetissue
C) Bundles of collagen are often found in loose connectivetissue.
D) Dense connective tissue includes adipose tissue.

4) Which of the following is not correctly matched?
E) Kidney: absorption
A) Skin: protection
B) Skin: absorption
C) Kidney: filtration
D) Digestive tract: absorption

5) Smooth muscle:
A) has long, cylindrical cells.
B) is under involuntary control.
C) contains intercalated discs.
D) has striations.

6) Which of the following increases the surface area of certainepithelial tissues?
A) Cilia
B) Basal lamina
C) Microvilli
D) Basement membrane
E) Desmosomes

7) Choose the correct answer.
A) Muscle is derived from the primary germ layer, called theectoderm.
B) Epithelium is derived from all three primary germ layers:ectoderm, mesoderm, and endoderm.
C) Nervous tissue is derived from the primary germ layer, calledthe mesoderm.
D) Connective tissue is derived from the primary germ layer, calledthe endoderm

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