5 Written Questions

1. is the strongest osseous tissue having the osteon as the basic structural unit; this type of tissue is found in long bones and the surfaces of all bones.
2. are cell fragments in blood that participate in blood clotting.
3. lubricates and nourishes the articular cartilage covering the bones at movable joints and contains macrophages that remove microbes and debris from the joint cavity.
4. consists of columns of bone called trabeculae which contain lamellae, osteocytes, lacunae and canaliculi; it does not have osteons.
5. the layer of a serous membrane which is attached to and lines the walls of the cavity.

5 Matching Questions

1. excitable cells
2. neurons
3. erythrocytes
4. trabeculae
5. serous fluid

1. a are nerve cells which are sensitive to various stimuli which they convert into electrical signals called action potential or nerve impulses.
2. b are columns of bone within spongy bone; red bone marrow is found in the spaces between the columns.
3. c Neurons and muscle cells which exhibit electrical excitability, the ability to respond to certain stimuli by producing actions potentials.
4. d is a watery lubricant that allows organs to glide easily over one another or to slide against the walls of cavities.
5. e are cells in blood which carry oxygen from the lungs to the tissues and carbon dioxide from the tissues to the lungs.

5 Multiple Choice Questions

1. in blood are the cells that are involved in phagocytosis, immunity and allergic reactions.
   1. synoviocytes
   2. osteocytes
   3. leucocytes
   4. thrombocytes
2. a thin cylindrical process that may be very long and carries the nerve impulse to another neuron or another tissue; there is usually only one of these per neuron.
   1. osteon
   2. axon
   3. neurons
   4. lymph
3. the layer of a serous membrane which covers and adheres to the organs within the cavity.
   1. visceral layer
   2. trabeculae
   3. lamellae
   4. parietal layer
4. consists of concentric rings of extracellular matrix of mineral salts and collagen fibers; lacunae in the matrix contain osteocytes; projecting from the lacunae are small canals containing the processes of osteocytes; a central canal contains blood vessels and nerves.
   1. osteon
   2. axon
   3. osteocytes
   4. neurons
5. is usually involuntary, nonstriated with a single, centrally located nucleus in a small spindle-shaped fiber.
   1. muscular tissue
   2. smooth muscle tissue
   3. skeletal muscle tissue
   4. cardiac muscle tissue

5 True/False Questions

1. muscular tissue → is a connective tissue with a liquid extracellular matrix and formed elements (cells).

   True        False

2. synoviocytes → form a discontinuous layer of cells of synovial membranes and they secrete some components of synovial fluid.

   True        False

3. fibrosis → is the process of scar tissue formation when fibroblasts are active in the tissue repair.

   True        False

4. membranes → the parts of a neuron which receive stimuli; they are usually short, tapering highly-branched cell processes which are connected to the cell body.

   True        False

5. blood plasma → is a connective tissue with a liquid extracellular matrix and formed elements (cells).

   True        False