1.04 UTF-8 0 0 0 A nerve is... 1 the same as a neuron 0 a group of neurons 0 a bundle of fibers 1 any long axon 0 in the PNS and CNS 0 What is NOT a function of astrocytes? 1 phagocytize dead neurons and infectious microorganisms in the brain 1 control the concentrations of ions int he tissue fluid between neruons 0 help synapses to work better 0 control blood flow to nervous tissue by making arterioles dilate or constrict 0 conduct waves of calcium ions 0 Circle the FALSE statement about muscle spindles. 1 consist of intrafusal muscle fibers and a capsule, but not extrafusal fibers 0 measure muscle stretch 0 their sensory nerve fibers fire more often when the whole muscle is contracting than when the muscle is stretched 1 occur in the perimysium around muscle fascicles 0 occur in skeletal muscle but not in smooth or cardiac muscle 0 Circle the CORRET statement about a TRIAD in skeletal muscle tissue. 1 all three of its parts are made of sarcoplasmic reticulum 0 it lies external to muscle fibers but internal to myofibrils 0 a triad is found at each z line, so there are as many triads as sarcomeres 0 it functions to excrete calcium ions out of the deepest part of the muscle cell, into the extracellular space to signal the motor-nerve endings 0 it consists of a T tumbule and two terminal cisterns of smooth endoplasmic reticulum 1 Intercalated disc: Which type of cell junction is NOT present in an intercallated disc? 2 Zonula Occludens 1 A nerve membrane 1 occurs on the internal surface of the stomach and intestine 0 is made of mesothelium and connective tissue 1 forms the fibrous pericardium 0 does not line any adult body-cavities that develop from the embryonic coelom 0 Multiple sclerosis is a disease that progressively destroys myelin in the CNS. What is the main cell type affected by this disease? That is, which cell is damaged first? 2 oligodendrocyte 1 a bone lamina... 1 is synonymous with a bone lamella 0 has no cappillaries near it 0 several laminae make up each "circumferential lamella" 1 Neutrophils... 2 phagocytise bacteria secrete protein nets into the extracellular matrix to trap and kill bacteria rush to areolar CT that is newly infected with bacteria secrete bactericidal chemicals are short lived 1 which is the FALSE statement about epithelial types... 1 stratified squamous is thich and protective 0 simple squamous borders the lumen of blood vessels and lymph vessels 0 The secretory units of glands are ususally simple cuboidal or simple columnar 0 in stratified epithelia, cells in the basal layer divide then move up to replace the apical layers of cells. 0 despite its double confusing name, pseudostratified epithelium is indeed a stratified type. 1 Loose CT: which part of the extracellular matrix is not produced by fibroblasts 1 glycoproteins, such as fibronectin 0 tissue fluid 1 collagen molecules 0 ground substance 0 glycosaminoglycans 0 when do epiphyseal plates first appear in growing endochondral bones? 2 around the time of birth 1 what is responsible for the relative impermeabilityu of the blood/brain barrier capillaries, expecially to the smallest, non-vital molecules in the blood plasma? 2 the lack of intercellular clefts, because the zonula occludens are complete and continuous 1 Collagen type I: what is the correct size-order of the various subunits of the thich collagen strands you see in the dermis from largest to smallest. 2 fiber, unit fibril, (tropo)collagen colecule, alpha chain, amino acid 1 not a granulocyte, changes into another cell type after diapedesis, nucleus often C-shaped, reletively large cell. 1 eosinophil 0 monocyte 1 platelet 0 megakaryocyte 0 erythrocyte 0 Most pieces of carilage in the human skeleton consist of ... 2 hyaline cartilage 1 grows by appositional growth only 2 bone 1 what is not present in loose reticular CT: Lymphoid tissue stroma of bone marrow splenic cords 2 hematopoietic stem cells 1 a Purkinje myocyte 2 connects to other purkinje myocytes, in a row, by desmosomes and gap junctions but not by intercalated discs. 1 Nucleolus 2 in nucleus makes the two kinds of subunits of ribosomes 1 relatively abundant within protein-secreting gland cells, such as goblet cells 2 RER 1 salivary gland is what type of gland 2 compound tubuloacinar 1 what causes cilia to beat 2 microtubules in a cilium grip and try to move along one another. 1 similar to a desmosome, except it is a longer junction and contains more actin 2 zonula adherans 1 continuous with SER, but branches less. Has attached ribosomes. 2 RER 1 resist compression foces on cells 2 microtubules 1 resist tension forces 2 intermediate filaments 1 osteocytes and brown-fat cells are not present... 2 in bone marrow 1 cells in the bone marrow include: 2 immature RBCs mesenchymal stem cells megakaryocytes young B lymphocytes, dividing and rearranging their genes so they become assigned to their antigens 1 hyperactive B lymphocytes 2 plasma cells 1 the only immune organ that lacks true lymphoid tissue and does not directly fight infection is: 1 lymph node 0 tonsil 0 thymus 1 spleen 0 GALT 0 no marrow cavity ever forms in... 2 intramembranous ossification of a flat bone of the skull 1 red pulp in spleen 2 destroys worn-out RBCs 1 central arteries are associated more with 2 white pulp than with red pulp 1 removes and destroys antigens from the bloodstream in spleen 2 white pulp 1 what type of CT holds spleen together 2 capsule of dense CT 1 responsible for making carilage resilient 2 aggrecan proteoglycans 1 secretes hormones related to our body's nutritive functions 2 adipose tissue 1 occurs along with loose areolar connective tissue in mesenteries 2 adipose tissue 1 a pt with a allergy attach or worms should show... 2 elevated eosinophils 1