BI13_Problem Set 2 (key)

BI13_Problem Set 2 (key) - 3,) What is the difference...

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Sawa Biology 13 Name: Points (20): Laboratory Day: Saturday Lecture Exam 2 Problem Set This sheet is due Saturday 3/7/09. You may turn it in earlier underneath my office door (S11). You may work with others on this assignment, but copying is not allowed. Late work will not be accepted because I will post the answer key on Blackboard immediately after lab class. 1.) What is the difference between merocrine and holocrine glands? Give one example of each type. (4 points) Merocrine glands secrete using exocytosis. Most glands are merocrine, for example the goblet cell. Holocrine glands secrete by breaking cells open. An example of a holocrine gland is the sebaceous gland. 2.) Name the four types of connective tissue and tell which type of cell makes up each tissue (8 points). Connective tissue proper contains fibroblasts Cartilage contains chondrocytes Bone or osseous tissue contains osteocytes Blood contains blood cells
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Unformatted text preview: 3,) What is the difference between thick and thin skin? Where is thick skin located? (4 points) Thick skin contains an extra layer called the stratum lucidum. Thin skin contains only four layers (stratum basale, stratum spinosum, stratum granulosum, and stratum corneum) Thick skin is found on plams, fingertips and soles of the feet. 1 Sawa Biology 13 4.) What cell causes skin cells to become cancerous? (2 points) UV light damages DNA. This causes mutations in some cells that allow the cell to grow uncontrollably. 5.) If a person has first degree burns on the posterior surface of his trunk and both arms, what percentage of his body is burnt? Is this considered a critical burn? (2 points) He is burned over 27% of his body. No, this is not critical because they are only 1 st degree burns. (It would be critical if they were 2 nd degree burns) 2...
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This note was uploaded on 08/12/2009 for the course BI 13 taught by Professor Alexasawa,ph.d during the Spring '09 term at College of the Desert.

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BI13_Problem Set 2 (key) - 3,) What is the difference...

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