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BIO101 CH5 Obj 1+4
| Question | Answer |
|---|---|
| What are the four major tissue types? | Epithelial, connective, muscle, and nervous tissue. |
| What is the function of epithelial tissue? | Protection, secretion, absorption, and excretion. |
| Where is epithelial tissue located? | Covers body surface, covers and lines internal organs, and composes glands. |
| What are the distinguishing characteristics of epithelial tissue? | Lack blood vessels, cells readily divide, and cells are tightly packed. |
| What is the function of connective tissue? | Bind, support, protect, fill spaces, store fat, and produce blood cells. |
| Where is connective tissue located? | Widely distributed throughout the body. |
| What are the distinguishing characteristics of connective tissue? | Mostly have good blood supply, cells are farther apart than epithelial cells, with extracellular matrix in between. |
| What is the function of muscle tissue? | Movement. |
| Where is muscle tissue located? | Attached to bones, in the walls of hollow internal organs, and the heart. |
| What is the distinguishing characteristic of muscle tissue? | Able to contract in response to specific stimuli. |
| What is the function of nervous tissue? | Conduct impulses for coordination, regulation, integration, and sensory reception. |
| Where is nervous tissue located? | Brain, spinal cord, and nerves. |
| What is the distinguishing characteristic of nervous tissue? | Cells communicate with each other and other body parts. |
| What are the three types of intercellular junctions? | Tight junctions, desmosomes, and gap junctions. |
| What are tight junctions? | Close space between cells by fusing cell membranes. (Keep your body's integrity and prevents things from passing through) |
| What is an example of tight junctions? | Cells that line the small intestine. |
| What are desmosomes? | Bind cells by forming "spot welds" between cell membranes. |
| What is an example of desmosomes? | Cells of the outer skin layer. |
| What are gap junctions? | Form tubular channels between cells that allow exchange of substances. |
| What is an example of gap junctions? | Muscle cells of the heart and digestive tract. |
| What is a general characteristic of epithelium? | Lack blood vessels (avascular). |
| What are the three epithelial cell shapes? | Squamous (flat), cuboidal (cube-shaped), and columnar (tall). |
| What are the three epithelial tissue layers? | Simple (one layer of cells), stratified (2 or more layers of cells), and pseudostratified (appears layered, but is not). |
| What does pseudo mean? | Fake. |
| What is simple squamous epithelium? | Single layer, flattened cells. |
| What is the function of simple squamous epithelium? | Filtration, diffusion, osmosis, covers surface. |
| Where is simple squamous epithelium located? | Air sacs of lungs, walls of capillaries, linings of blood and lymph vessels, part of the membranes lining body cavities and covering viscera. |
| What is simple cuboidal epithelium? | Single layer, cube-shaped cells. |
| What is the function of simple cuboidal epithelium? | Protection, secretion, absorption. |
| Where is simple cuboidal epithelium located? | Surface of ovaries, linings of kidney tubules, and linings of ducts of certain glands. |
| What is simple columnar epithelium? | Single layer, elongated cells. |
| What is the function of simple columnar epithelium? | Protection, secretion, absorption. |
| Where is simple columnar epithelium located? | Linings of uterus, stomach, and intestines. |
| What is pseudostratified columnar epithelium? | Single layer, elongated cells. |
| What is the function of pseudostratified columnar epithelium? | Protection, secretion, absorption. |
| Where is pseudostratified columnar epithelium located? | Linings of uterus, stomach, and intestines. |
| What is stratified squamous epithelium? | Many layers, top cells flattened. |
| What is the function of stratified squamous epithelium? | Protection, outer layer of skin, called the epidermis, is keratinized. |
| Where is stratified squamous epithelium located? | Superficial layer of skin and linings of oral cavity, vagina, and anal canal (exit from outside world). |
| What is transitional epithelium? | Many layers of cube-shaped and elongated cells. |
| What is the function of transitional epithelium? | Stretchability, protection. |
| Where is transitional epithelium located? | Inner lining of urinary bladder and linings of ureters and part of urethra. |
| What is glandular epithelium? | Composed of cells that produce and secrete substances into ducts or body fluids. |
| What are the two types of glands in the body? | Endocrine glands and exocrine glands. |
| What are endocrine glands? | Secrete into tissue fluid or blood. |
| What are exocrine glands? | Secrete into ducts that open onto a surface. |
| What are merocrine glands? | Secrete fluid products by exocytosis. |
| What are examples of merocrine glands? | Salivary and sweat glands, pancreas. |
| What are apocrine glands? | Lose small part of cell during secretion. |
| What are examples of apocrine glands? | Mammary and ceruminous glands. |
| What are holocrine glands? | Release entire cells filled with product. |
| What is an example of a holocrine gland? | Sebaceous glands. |
Created by:
jullian18