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Microanatomy I
| Question | Answer |
|---|---|
| mitochondria | are self replicating |
| some cells components that can be identified using the light microscopy | nucleolus, cilia, lipid globules |
| human cells are: | eukariotic |
| all body tissues are derived from cells | true |
| cell membrane is composed of: | bilayer of phospholipids and proteins |
| endoplasmic reticulum | may be associated with ribosomes |
| In an active cell, the nucleolus | appears dense and intensely stained |
| Meiosis | results in the formation of three polar bodies and one ovum |
| Apoptosis | part of normal fetal development |
| Embrionic tissue layers | endoderm, mesoderm, ectoderm |
| process of diferentiation involves | cells becoming more specialized in fuction |
| Mesothelial cells are found: | lining the pleural cavity |
| endothelial cells are found: | lining capillaries |
| Ingestion of foreign bodies | is not a fuction of ephitelial cells |
| Cadherin | protein involved and found in cell membranes and associated with cell junctions |
| Basal lamina | structure that separates ephitelial membranes from underlying structures |
| cilia | contain actin filaments attached to cytoskeleton |
| simple squamous ephitelium | presents minimal resistance to passage of nutrients |
| columnar ephitelial cells | are involves in adsoption, may be ciliated, may have a brush border |
| Goblet cells | contain mucopolyssaccharides/glycoprotein complexes |
| pseudostratified ephitelium | is found lining the respiratory tract |
| stratified squamous ephitelium | may be found covering the external os of the uterine cervix |
| urinary bladder | lined by transitional epithelium |
| diffuse endocrine system | contain cells referred as APUD cells |
| functions of supporting and connective tissue include | storage of nutrients, providing a medium for diffusion of nutrients, connection of body parts and organs |
| fibrillar proteins include | collagen,elastin, fibrillin |
| the parent cell of supporting tissue is | mesenchymal cell |
| endothelial cell | is not a supporting cell |
| describe an active fibroblast | spindle shaped, diffuse chromatin, large nucleolus, basophilic cytoplasm |
| myofibroblast | produce type III collagen and reticulin |
| brown fat is commonly found | in embrionic tissues |
| plasma cells | produce immunoglobulins |
| fenestrations | small perforations in elastic tissues |
| oxytalan and elaunin are | immature forms of elastin fibres |
| loose connective tissue | often contain macrophages and mast cells |
| dense regular connective tissue | found in tendons and ligaments |
| elastic fibres | appear yellow in unstained sections |
| adipocytes | have a flattened peripheral nucleous |
| Mesenchymal tissues | contain large amounts of amorphous ground substance |
| ground substance in umbilical cord is known as | Wharton's jelly |
| fibrocartilage | contains large amount of collagen |
| lamellar bone | prduced by osteoblasts |
| in bone, osteoblast appear as | cuboideal cells with large nucleous and basopjilic cytoplasm |
| skeletal muscle | referred sometimes as voluntary muscle |
| terms "fast twitch" and slow twitch" refer to | skeletal muscle fibres |
| smooth muscle | controlled by autonomic nervous system |
| sarcomere | portion of myofibril between adjacent Z bands |
| skeletal musclecells may be classified as | red and white fibres |
| sarcoplasm | contains smooth endoplasmic reticulum and mitochondria |
| muscle tissue | may sustain a state of semicontraction for long periods |
| in cross section through a cardiac muscle cell | nucleous will be centrally located |
| myoephitelial cells | found associated with glands and ducts |
Created by:
dduque
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