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58 Cards in this Set

  • Front
  • Back
The glycoccalyx of the cell membrane is concerned primarily with...
protection and cell recognition
In bulk transport...
endocytosis results in the formation of a phagosome
Barr body...
inactive X chromosome
Within mitochondria, elementary particles...
contain enzymes for oxidative phosphorylation
In the Golgi...
secretory vesicles depart from the maturing face
During a root canal, you notice an unusual mass adjacent to the tooth root, remove mass and submit it for a biopsy b/c you suspect the mass may be of neural origin, you request which of the following special immunohistochemical stains for confirmation?
neurofilament protein
Most hypertrophy of the cell occurs during which phase of the cell cycle?
G1
Tetrad formation occurs during which phase of meiosis?
Prophase 1
During apoptosis, shrinkage of the nucleus is known as:
pyknosis
Which of the following is most consistent with anemia due to severe blood loss?
reticulocytosis
Gelatinase is present in the tertiary granules of:
neutrophils
While on a picnic, you are stung by a bee and within the next half hour begin to experience difficulty breathing. This anaphylactic rxn is a result of:
SRS from basophils
Lymphocytes which specialize in the production of antibodies are:
plasma cells (pregnant w/anitbody)
During erythropoieses:
late normoblasts are typically orthochromatic
During nemopoiesis:
5 classes of unipotential
Which of the following cell jxs is formed by the fusion of a circumferential band of cell memb b/t cells?
zonula occludens
most gland secrete only their cell products w/out any cytoplasm- this is known as _____ secretion
meorcrine
In smooth muscle myosin binding is controlled by:
calmodulin
atrioventricular valves are anchored to the wall of the heart by thin strands of CT referred to as:
chordae tendineae
nissl susbstance with in neurons represents:
rER
parasympathetic, post-synaptic neuron cell bodies are located:
near the effector organ
what type of neuroglial cell is responsible for myelination w/in the CNS?
oligodendrocyte
during nerve damage and repair:
anterograde degeneration is due to an interruption of axonal transport
What are the five basic tissues?
blood, connective tissue, epithelium, muscle, and nervous
What are parenchyma cells?
functionally specialized cells
What are stroma cells?
less specialized supporting tissue
What does connective tissue do?
surrounds and supports other tissues (structurally, metabolically, or both)
What does epithelium tissue do?
covers body surfaces and cavities (internal and external)
ex: gut lining, skin, glands
What is nervous tissue?
modified cell collection responible for communication and coordination
What is nervous tissue made of?
neurons and glial cells
Communication can be both...
electrical and chemical
What are organs?
anatomically discrete collections of tissue that perform specific functions
What is hematoxylin?
a dark blue basic dye that stains acids
What is eosin?
bright red, acidic dye that stains bases
What is the plasma memebrane/plasmalemma?
semipermeable phospholipid bilayer
What does amphoteric mean?
both hydrophilic and hydrophobic qualities
What accounts for the membranes trilaminar appearance on EM?
hydophilic outer layers are seen as separate entities, as well as the inner hyrophobic layer
What is the function of the plasma membrane?
transfer of nutrients and metabolites, attachment to adj cells, and cell-cell comm.
What increases fulidity/flexibility?
the presence of unsaturated f.a., which prevent close packing
What helps to regulate fluidity and stabilizes the membrane?
Cholesterol, present in an almost 1:1 ratio
Why does Cholesterol regulate fluidity and stabilize the membrane?
it is amphipathis and has a kinked conformation, preventing the overpacking of f.a. tails
Increasing cholesterol increases or decreases fluidity?
decreases
it fills the gaps btwn the kinks of the ufas
What makes up almost half of the total membrane mass?
proteins embedded in the bilayer
What are extrinsic proteins?
aka peripheral
on the outside, some span the entire thickmess (transmural/transmembrane), held in place by hydrophobic central zone, many times have pores/channels for usu hydrophilic molecs.
What are integral proteins?
embedded in phospholipid bilayer
What do pumps do?
transport ions across membrane
What is an example of a pump?
ex: Na/Cl pump: transmembrane protein complex that exchanges a Na for a K ion across the membrane
What are channels?
allow passage of small molecules via diffusion
What increases fulidity/flexibility?
the presence of unsaturated f.a., which prevent close packing
What helps to regulate fluidity and stabilizes the membrane?
Cholesterol, present in an almost 1:1 ratio
Why does Cholesterol regulate fluidity and stabilize the membrane?
it is amphipathis and has a kinked conformation, preventing the overpacking of f.a. tails
Increasing cholesterol increases or decreases fluidity?
decreases
it fills the gaps btwn the kinks of the ufas
What makes up almost half of the total membrane mass?
proteins embedded in the bilayer
What are extrinsic proteins?
aka peripheral
on the outside, some span the entire thickmess (transmural/transmembrane), held in place by hydrophobic central zone, many times have pores/channels for usu hydrophilic molecs.
What are integral proteins?
embedded in phospholipid bilayer
What do pumps do?
transport ions across membrane
What is an example of a pump?
ex: Na/Cl pump: transmembrane protein complex that exchanges a Na for a K ion across the membrane
What are channels?
allow passage of small molecules via diffusion