Questions on Chapter 39

Questions on Chapter 39 - Protection Support and Movement...

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Protection, Support, and Movement Chapter 39 Epithelial coverings protect underlying tissues and may be specialized for sensory, respiratory, or other functions: Epithelial Tissue in both invertebrates and vertebrates protects underlying tissues specialized to receive sensory signals, for gas exchange or respiratory functions Integumentary System of Vertebrates includes the skin and structures that develop from it Describe the integumentary system of fishes, reptiles, amphibians and birds. How are the outer coverings for each of these groups important for protection? Name some general attributes of mammalian skin, and how they help in the protection of the body Structure and Function of the Epidermis (Fig 39-1): Protects body from outer environment. . The most superficial layer is the stratum corneum containing dead cells filled with keratin. What is keratin? What properties of keratin aid in the role of the stratum corneum to protect the body from external forces? We sometimes say that 90% of the dust in the room is made up of dead skin cells – why? Under the stratum corneum is the stratum basale; as the cells divide, they are pushed to the surface. These cells are mature and flattened; do they contain keratin also? This layer also contains other cells that produce a pigment important to fair skinned people. Name the cells, the pigment, and the reason why it’s important to fair skinned people ( hint: remember the effects of UV on the skin) Under the epidermis lies the dermis: this layers contains a dense, fibrous matrix of connective tissue, collagen and blood vessels This layer houses the hair follicles and sweat glands and rests on a layer of subcutaneous tissue. What is the composition of this layer? Skeletal systems, whether they are hydrostatic skeletons, exoskeletons, or endoskeletons, support and protect the body and transmit mechanical forces important in movement The Skeletal System: supports and protects the body. It also transmits mechanical forces
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This note was uploaded on 10/08/2010 for the course BIO 380 taught by Professor Martin during the Spring '10 term at Rutgers.

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Questions on Chapter 39 - Protection Support and Movement...

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