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BIO 110 Lecture Test

Chapter 4

QuestionAnswer
What is a body membrane? Cover body surfaces. Form protective sheets
3 types of epithelial membranes Cutaneous: skin Mucous: lining of body cavities open to exterior of body. Serous: lining of body cavities closed to exterior of body.
Parietal and Visceral membranes Parietal layer: lines wall of ventral body cavity Visceral layer: covers outside of organ
Membrane that lines the walls of the Peritoneal cavity. parietal peritoneum.
Membrane that lines the walls of the Pleural cavity. parietal pleura.
Where are Synovial membranes located? lining the cavities of freely movable joints. synovial joints
Why is the skin classified as an organ? Because it is made up of two or more tissues
A few functions of the skin maintains body temp, water balance, synthesizes vitamin D
Two layers of the skin Epidermis & Dermis
Tissue that makes up the Epidermis Stratified squamous epithelium
Layers of epidermis from deep to surface Stratum Basale Stratum Spinosum Stratum Granulosum Stratum Lucidum (only in thick skin) Stratum Corneum
Where is the Hypodermis located? beneath the dermis
Cells found in Epidermis Melanocytes: produce melanin Epidermal Dendritic: alert & activate immune cells Merkel: sensory nerve endings
Function of Melanin absorbs UV to prevent DNA mutations of skin cells
Function of Dermal Papillae Form friction ridges (fingerprints)
Function of Dermal Blood vessels regulate body temp. conserve and get rid of body heat
Factors that contribute to skin color Melanocytes produce different amounts and sizes of pigment. determined genetically
Structures of skin appendage Cutaneous glands Hair & nail follicles Nails
Where are sebaceous glands found? Dermis layer
Sebum oily mixture of fatty material. Keep skin and hair waterproof
Apocrine and Endocrine sweat glands Apocrine: Become active during puberty. pubic hair Endocrine: throughout body. thermoregulation
Parts of hair Hard keratinized epithelial cells Root Bulb Shaft
Parts of Nail Nail body plate Nail bed Lunula Cuticle
function of sensory receptors in the skin provide information about external environment
Created by: user-2067544
 

 



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