Question

1. how is the stratified squamous epithelium of your skin different from that lining your orifices?
2. list six (6) functions of connective tissue.
3. of the four (4) basic tissue types, which one has the ability to reproduce the fastest?
4. draw the three (3) basic cell shapes of epithelium.
5. muscle cells do one thing: what is it?
6. list the three (3) types of muscle and where they are found.
7. define the terms involuntary, striated, nonstriated, and voluntary regarding muscle.
8. what is the function of cilia in epithelial tissue?
9. list the three (3) types of cells found in connective tissue and their functions?
10. what are the cells of nervous - tissue called?
11. list the functions of neurons and neuroglial cells.

Explanation:

1. The stratified squamous epithelium of the skin is keratinized, providing a tough, protective barrier against abrasion and water - loss. The stratified squamous epithelium lining orifices (such as the mouth, esophagus) is non - keratinized, allowing for more flexibility and moisture retention.
2. Connective tissue functions include: support (holding organs in place), protection (cushioning organs), insulation (adipose tissue), transportation (blood as connective tissue transports nutrients and waste), binding of tissues together, and storage of energy (adipose tissue stores fat).
3. Epithelial tissue has the fastest reproduction rate among the four basic tissue types. It is constantly exposed to the environment and undergoes wear and tear, so rapid cell division is necessary for repair and replacement.
4. The three basic cell shapes of epithelium are squamous (flat, scale - like cells), cuboidal (cube - shaped cells), and columnar (tall, rectangular cells).
5. Muscle cells contract. This contraction allows for movement of the body, movement of substances through organs (such as in the digestive tract), and maintenance of posture.
6. The three types of muscle are skeletal muscle (found attached to bones, responsible for voluntary movement), smooth muscle (found in the walls of internal organs like the stomach, intestines, and blood vessels, responsible for involuntary movement), and cardiac muscle (found only in the heart, responsible for the involuntary, rhythmic contraction of the heart).
7. Involuntary muscle is not under conscious control (like smooth and cardiac muscle). Striated muscle has a striped appearance under the microscope due to the arrangement of contractile proteins (skeletal and cardiac muscle are striated). Non - striated muscle lacks this striped appearance (smooth muscle). Voluntary muscle is under conscious control (skeletal muscle).
8. Cilia in epithelial tissue move substances across the surface of the tissue. For example, in the respiratory tract, cilia move mucus and trapped particles out of the lungs.
9. Fibroblasts in connective tissue produce fibers and ground substance. Adipocytes store fat. Macrophages are phagocytic cells that engulf and destroy pathogens and debris.
10. The cells of nervous tissue are called neurons.
11. Neurons transmit electrical impulses (nerve impulses) throughout the body, allowing for communication between different parts of the body. Neuroglial cells support, protect, and nourish neurons, and also play roles in maintaining the proper environment for neural function.

Answer:

1. Skin's is keratinized, orifice - lining is non - keratinized.
2. Support, protection, insulation, transportation, binding, energy storage.
3. Epithelial tissue.
4. Squamous, cuboidal, columnar.
5. Contract.
6. Skeletal (attached to bones), smooth (in internal organs), cardiac (in heart).
7. Involuntary: not under conscious control; Striated: striped appearance; Non - striated: no striped appearance; Voluntary: under conscious control.
8. Move substances across tissue surface.
9. Fibroblasts (produce fibers and ground substance), Adipocytes (store fat), Macrophages (phagocytize pathogens and debris).
10. Neurons.
11. Neurons: transmit electrical impulses; Neuroglial cells: support, protect, nourish neurons.