BIOL-N - Biology BIOL-N 261 Lecture Notes - Lecture 4: Sebaceous Gland, Merocrine, Melanocyte

1-What type of tissue(s) is the hypodermis? Is the hypodermis a layer of skin?

2-What are the important functions of subcutaneous fat? Is liposuction a means of permanent fat loss? Why is the hypodermis the desirable site for subcutaneous injections, such as insulin shots?

3-How do partial-thickness burns differ from full-thickness burns? Is there typically scarring following first degree burns? Why so/why not? Why do severe second degree burns and third degree burns often require skin grafting?

4-Skin is referred to as soft keratin, but hair and nails are referred to as hard keratin. Why? What are the functions of a hair follicle? The arrector-pili reflex is considered to be a vestigial reflex. That is, it once had a physiological purpose, but that purpose does not exist anymore, but the reflex still does. What was the function of this reflex in distant humans? What are goosebumps? How do they relate to this reflex?

1.Because it is a thin tissue made of a single layer offlattened cells, many substances diffuse easily across simplesquamous epithelium. give two structures or organs that are linedwith simple squamous epithelium.

2.simple and pseudostratified columnar epithelium may containgoblet cells. what are golblet cells and what is their function

3.columnar cdells may have ciliated apical surfaces, what arecilia and what is their function

4.what features makes stratified squamous epithelium well suitedfor lining structures that are subject to abraision or wear andtear

5.what are common characteristics of connectie tissue

6.what suffix indicates an immature cell? a mature cell?

7.is areolar connective tissue classifie as a loose or denseconnective tissue? why?

8.what protein fiber type is found in dense regular connectivetissue?

9. tendons and ligaments are structures formed of dense reuglarconnective tissue. what are the functions of tendonds andligaments.

10.how does the arrangment of protein fibers differ whencomparing dense regular and dense irregular connective tissue

Short answers please, answer them all and I will rate you

1-What type of tissue(s) is the hypodermis? Is the hypodermis a layer of skin?

2-What are the important functions of subcutaneous fat? Is liposuction a means of permanent fat loss? Why is the hypodermis the desirable site for subcutaneous injections, such as insulin shots?

3-How do partial-thickness burns differ from full-thickness burns? Is there typically scarring following first degree burns? Why so/why not? Why do severe second degree burns and third degree burns often require skin grafting?

4-Skin is referred to as soft keratin, but hair and nails are referred to as hard keratin. Why? What are the functions of a hair follicle? The arrector-pili reflex is considered to be a vestigial reflex. That is, it once had a physiological purpose, but that purpose does not exist anymore, but the reflex still does. What was the function of this reflex in distant humans? What are goosebumps? How do they relate to this reflex?