What do the proteoglycan and collagencomponents of cartilage contribute to connective tissue?(Explainthe mechanical reason the gel-like aggregates of proteoglycan areimportant to the knee)

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Irving HeathcoteLv2

28 Sep 2019

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Build a dichotomous key to all the tissues you have seen in the lab. For this, you can use any of their morphological characteristics (under the microscope) but not their physiological functions.

Tissues seen in this lab:

1) Epithelia: simple squamous, simple cuboidal, simple columnar, pseudostratified columnar, stratified squamous, stratified cuboidal and columnar, transitional, and specialized epithelia (goblet cells).

2) Connective Tissue: Adipose, Areolar, Cartilage, hyaline cartilage, fibrocartilage, elastic cartilage, bone and blood.

3) Muscle: Smooth muscles, Cardiac muscles, skeletal muscle

4) Nervous tissues: Neurons, central nervous system (CNS), satellite cells, schwann cells, ependymal cell

The extracellular matrix of cartilage contains high concentrations glycosaminoglycan-linked proteoglycans. How do you suppose these proteoglycans help to establish a hydrated gel-like environment around the cell?

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Differentiate the range of motion of hip flexion with the knee flexed and then with it extended. Passively flex the hip through its full range permitting the knee to flex. Then passively flex the hip with the knee straight. Note the differences in range and end feels. Why is there a difference in range of motion and what is this mechanical limitation called? What are the structures that limit hip flexion when the knee is in extension?

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What do the proteoglycan and collagencomponents of cartilage contribute to connective tissue?(Explainthe mechanical reason the gel-like aggregates of proteoglycan areimportant to the knee)

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