Tissues Basics
What is a tissue?
A group or mass of similar cells working together to perform common functions.
What are the five main functions of epithelial tissue listed in the slides?
Protection, secretion, absorption, excretion, and sensing.
What is collagen described as doing in the skin?
It acts like glue, anchoring the epidermis to the dermis.
Name two functions of connective tissues
support, protection, binding structures, filling space, storing fat, producing blood cells, or fighting infection.
What are the three types of muscle tissue shown in the slides?
Cardiac, skeletal, and smooth muscle
What pigment is discussed as contributing to skin color?
What are the four main types of tissue?
Epithelial, connective, muscle, and nervous tissue.
What do simple and stratified mean?
Simple means one cell layer; stratified means multiple layers
Which gene mutation is associated with the form of EB discussed in the slides?
A mutation in the COL7A1 gene
What is the matrix made of?
Ground substance, fibers, fibroblasts, macrophages, mast cells
Which muscle tissue is identified as striated?
Skeletal Muscle
What are the two main epidermal cell types named in the slides?
Melanocytes and keratinocytes.
Which tissue type covers body surfaces and lines surfaces inside the body?
Epithelial tissue
What do squamous, cuboidal, and columnar describe?
Squamous = flat; cuboidal = square; columnar = column-shaped/rectangular.
Why do blisters form in the skin condition discussed in the slides?
The dermis pulls away from the epidermis, causing blisters.
What do fibroblasts do?
Produce fibers
What is the function of a neuron?
To transmit signals
How does tanning contribute to protecting skin from UV damage contributed to skin cancer?
Which tissue type binds structures together and provides support and protection?
Connective tissue.
Which epithelial tissue is thin and suited for diffusion and filtration, and where is it found?
Simple squamous; air sacs in the lungs and capillaries.
How can this skin condition affect nutrition?
Blistering in the mouth and esophagus can make swallowing difficult; scar tissue may narrow food passageways.
What is the difference between tendons and ligaments?
Tendons connect muscles to bones; ligaments connect bones to bones.
What are axons and dendrites associated with?
Neurons; they are structures which make up a neuron.
What are sutures, and name two alternatives
Sutures are stitches that hold tissue together while it heals; alternatives include glue, medical tape, and staples.
Which two cell types are found in nervous tissue, and what does each do?
Neurons transmit signals; neuroglia support cells.
Which epithelial tissue stretches, prevents leaking, and lines the urinary bladder?
Transitional epithelium.
Which type of connective-tissue protein fibers are discussed as helping hold tissues together, and what other fiber is mentioned with them?
Collagen fibers are anchor tissues and elastin assists with flexibility
Name the three cartilage types and one location or feature of each.
Hyaline: ends of joints, nose, respiratory passages/padding; elastic: external ear and larynx; fibrocartilage: tough, shock-absorbing, between vertebrae.
What are neuroglia?
Support cells in nervous tissue.
What gene is associated with skin pigmentation ?
MC1R.