Term
|
Definition
| A group of cells that interact in one or more task |
|
|
Term
| What are the four main types of tissues? |
|
Definition
| Epithelia, Muscle, Connective, Nervous |
|
|
Term
| What are the main characteristics of epithelial tissue? |
|
Definition
| One free surface faces a body fluid or the environment |
|
|
Term
| Where is epithelial tissue found? |
|
Definition
| Lines the body's surface, cavities, ducts, and tubes |
|
|
Term
| Compare squamous, cuboidal, columnar |
|
Definition
Squamous: flattened
Cuboidal: Cube- shaped, 3 dimensional, not flat
Columnar: Column shaped, more length than width. |
|
|
Term
| Compare simple to stratified |
|
Definition
Stratified: Two or more layers, more protective.
Simple: only one layer. |
|
|
Term
| Where are secretory organs derived from? |
|
Definition
|
|
Term
| What kinds of junctions hold cells together? |
|
Definition
Tight Junctions: very close proximity of cells to each other…. Rows of proteins fasten cells together and prevent any leakage (very little diffusion out) -stomach ling cells.
Gap Junctions: allow movement between cells therefore they dont have to cross membrane.
Adhering Junctions:hold cells together at a mass of proteins…more space between cells. |
|
|
Term
| What are the characteristics of connective tissue? |
|
Definition
Most abundant tissue, cells are scattered in an extracellular matrix. Matrix is a collagen and/or elastin fibers in a polysaccharide ground substance.
(Matrix- stuff between cells, has fibers, is the ground substance) |
|
|
Term
| Loose? Dense? Irregular? Regular? |
|
Definition
Loose: contains fibers and fibroblasts in a semifluid ground substance. Also, macrophages found in. (Under skin and epithelia). They are not right up next to each other.
Dense, Irregular: Not as much organization to fibers. Fibroblasts and collagen fibers. (In skin and around organs that don’t stretch much)
Dense, regular: Tissue close together, fiber organized. Fibroblasts found between rows of parallel bundles of collagen fibers. |
|
|
Term
| Cartilage? Bone? Adipose? |
|
Definition
Cartilage: cells found inside lagoon, rubbery matrix.
Bone: Found in la goony, middle place for blood cells.
Adipose tissue: filled with triglyceride |
|
|
Term
| Why is blood considered a C.T? |
|
Definition
| Blood cells arise in bone |
|
|
Term
| What is the function of muscle tissue? |
|
Definition
| Helps move the body and specific body parts, Contracts when stimulated |
|
|
Term
|
Definition
| Skeletal, Cardiac, Smooth |
|
|
Term
| Characteristics of : Skeletal, Cardiac, and Smooth? |
|
Definition
Skeletal: voluntary muscle, attached to bones by tenants, long, cylindrical cells are striated, cells are bundled close together in parallel lines.
Smooth: In walls of many internal organs and some blood vessels, nonvoluntary, not stripped and taper at the ends.
Cardiac: Only in the heart, cells are striated and branching, ends of cells are joined by communication junctions. Gap Junctions are found here. Intercalated disc hold cells together. |
|
|
Term
| Functions of Nervous Tissue? |
|
Definition
| Detects stimuli, integrates info, and relays commands for response. |
|
|
Term
|
Definition
Neurons: main communicators, excitable cells, when stimulate produce electrical impulse.
Glia: more numerous, come in diff. variety, consist more than half nervous tissue, protect and support neuron by structurally and metabolically. |
|
|
Term
| What are the three primary tissues? |
|
Definition
Ectoderm: epidermis of skin, nervous system.
Mesoderm: Most internal organs, and most skeletal muscle.
Endoderm: inside linage. |
|
|
Term
What is meant by integument?
Integumentary system? |
|
Definition
An animals outer covering. Examples
Chitin-hardened cuticle of many invertebrates
Vertebrate skin and its derivatives |
|
|
Term
| What are the two main layers of the skin? |
|
Definition
|
|
Term
| What functions does the skin have? |
|
Definition
1. Barrier Protection.
2. Vitamin D synthesis
3. Most extensive sense organ
4. Thermoregulation |
|
|
Term
| What is the rapidly dividing layer of the epidermis? |
|
Definition
|
|
Term
| What are three types of cells found in the stratum basale? |
|
Definition
| Keratinocytes, Melanocytes, Merkel Disc |
|
|
Term
| How many layers of epidermis are there? |
|
Definition
|
|
Term
| Name the layers of the epidermis and the approximate amount of layers of each. |
|
Definition
Stratum Corneum: 30 + layers.
Stratum Lucidum: only in thick skin.
Stratus Granulosum: 2- 5 layers.
Stratum Basale: single layer.
Stratum Spinosum: several layers. |
|
|
Term
| How does the blood get to epidermal cells, since there is no vessel in the epidermis? |
|
Definition
|
|
Term
| What is the role of Keratin? |
|
Definition
|
|
Term
| What is found in the dermis? |
|
Definition
| Mostly fibrous connective tissue (predominately collagen fibers, but some elastin and reticular) with blood vessels, sweat glands, sebaceous glands, hair follicles (with assoc arrector pili musc.) |
|
|
Term
| Why is nail Keratin more compact than hair keratin? |
|
Definition
| More compacted and more disulfide bridges because made of "hard keratin" |
|
|
