Cell Biology Concepts

Plasma cells are active in synthesizing and secreting antigen-binding proteins.

The proliferation of uterine endometrium depends on estrogen.

Spermatogonia are exclusively located in the basal compartment of the seminiferous tubules.

Keratin expression indicates cells have differentiated into epidermal epithelial tissue.

A protein translated on a cytoplasmic ribosome is directed to the endoplasmic reticulum because it has a hydrophobic signal sequence encoded at its amino terminus.

In the renal cortex, efferent arterioles directly supply the labyrinth of capillaries that carry resorbed glucose out of the kidney.

Region C (level 2) on the graph likely represents cells in metaphase II during spermatogenesis.

Following growth factor binding to its receptor, phosphorylation of tyrosine residues in receptor proteins is the direct signal transduction event.

After a barbiturate overdose, the greatest increase in hepatocytes after 2 days will be smooth endoplasmic reticulum.

During the final stage of secretory glycoprotein formation, glycoproteins are found in the trans Golgi complex

Synthesis of rRNA is specifically associated with the nucleolus.

Beating of cilia is mediated by dynein arms.

Long straight endometrial glands with narrow lumens in a thick stratum functionale are consistent with diminished activity of granulosa lutein cells in the ovary.

Detrusor muscle of the bladder consists of multinucleated myocytes.

In hematopoiesis, the differentiation of promyelocytes into neutrophilic myelocytes is marked primarily by the appearance of specific granules.

The cell process illustrated in the diagram is endocytosis.

The blood-brain barrier excludes albumin from the brain parenchyma.

A substance of low molecular weight being injected into a cell, with electron microscopy showing gap junctions, indicates electrical coupling.

Fenestrated capillaries are located in endocrine glands.

Erythroid cells with hyperchromatic nuclei and eosinophilic cytoplasm are likely orthochromatic erythroblasts.

Brain capillaries differ from those in the gut by the absence of endothelial cell membrane fenestrations.

Intrafusal fibers contain stretch-sensitive nerve endings, unlike extrafusal muscle fibers.

Spherocytosis can result from a point mutation in spectrin(protein A).

Cells will accumulate in the G2 phase if cultivated with an agent that blocks the cell cycle after DNA synthesis.

In demonstrating graft-versus-host rejection, lymphocytes migrate into the graft to initiate an immunologic response.

Nondisjunction during oogenesis is the most likely cause of autosomal trisomy

Dense, spherical granules in the mammalian heart store atrial natriuretic peptide which lowers blood pressure.

Supporting the hypothesis that muscles release a chemical trophic substance is partial denervation causing sprouting from intact axons that innervate denervated muscle cells.

Olfactory receptor cells. are the structures labeled X in the diagram of the olfactory epithelium.

For the oocyte, meiosis is completed at sperm entry into the secondary oocyte, known as fertilization.

Drugs, including alcohol, increase detoxifying enzymes in the liver through extensive proliferation of smooth endoplasmic reticulum.

The sarcoplasmic reticulum(structure A) is most active during energy generation for muscle contraction.

Cones are the most abundant type of cell within the fovea of the retina centralis.

Absence of interstitial cell-stimulating hormone(ICSH) will most likely cause atrophy of the prostate and seminal vesicles.

The key difference between somatic cells in adults is in their mRNAs.

Precursors of goblet cells migrate from superior to inferior in the wall the proximal intestine, during weeks 8-12 of gestation.

Axons lack rough endoplasmic reticulum.

The annulus fibrosus is dependent on diffusion of nutrients from synovial fluid.

Schwann cells are important in promoting axonal regrowth after ulnar nerve transaction.

A white belly spot and tail caused by a recessive genetic mutation indicates that melanocytes are most likely impacted..

Microvilli rely on a core of helical F-actin filaments for their skeletal framework.

Tumor cells promote endothelial cell proliferation and angiogenesis primarily through fibroblast growth factor (FGF) secretion.

Basophilic erythroblast can be recognized in the chart through Point Y where the hemoglobin is increasing but the amount of RNA diminishes

The pacinian corpuscles are most likely to detect the vibrations of a tuning fork.

The geniculate ganglia innervates the taste buds on the anterior two thirds of the tongue.

Purkinje's cell fibers provide the only output of the cerebellar cortex.

The Arrows indicate structures that are directly regulated by secretions of the follicular cells of the thyroid.

Supraoptic nuclei secrete oxytocin into the circulation.

The Clara cell are the most characteristic cell types of terminal bronchioles.

Mucus comes from the muscus on the alveolar ducts of of a a 12 year old girl with chronic athsma that is coughing up large amounts of mucus.

Periodic acid-Schiff (PAS) aining clearly shows abundant secretions of mucus in the bronchial epithelium.

Structure A in the respiratory tissue photomicrograph shows the most proximal region where respiration occurs.

increased activity of succinic dehydrogenase found in relatively less active, which must develop tension for long periods of time (eg, antigravity muscles) muscles

The destruction of Folliculostellate cells in the hypothalamus can result in increased secretion of a product if the anterior pitutary is no longer under hypothalmic control.

A genetic mutation that renders kinesin incapable of binding to microtubules is most likely to impair fast axonal transport

Rigor mortis is caused by ATP depletion with muscle relaxation requires ATP, thus myofibrils remain in a contracted state in the absence of neuronal stimulation

Meissner's corpuscles are structures arrows are pointing to in skin is specialized to transduce light touch that the sensory stimuli into action potentials

Sertoli cells prevent interaction between developing sperm and the immune system.

The Zona fasciculata will result in decreased thickness to chronic administration of glucocorticoids

fetal capillaries, and trophoblastic cells separate the maternal from fetal circulation.

Arterioles are the structures responsible for a fair-skinned woman's skin becomes pale and cold because the blood is diverted away from the capillary bed in the superficial layers of the dermis.

Thhe epithelium lining that is likely to be the site of a primary squamous cell carcinoma is the vagina.

The ducts of apocrine sweat glands are characteristically lined with are characteristically lined with Stratified cuboidal.

Multilaminar bodies in type II pneumocytes produce a substance that lowers alveolar surface tension

Epithelial cells derived from the pharyngeal pouches are the in the determining influence on the differentiation of T lymphocytes

Lung: The polypeptide with a molecular weight of 500 daltons that is most likely to remain in the blood bed introduced into the circulation through an intravenous drip

Acidophils can be responsible for abnormally rapid growth, administration of somatostatin will depress secretion for those cells in the pituitary gland

rough endoplasmic reticulum membrane, translocation of protein from the ribosome into the lipid bilayer of a membrane occurs most frequently at the level of the

Initial glycosylation of glycoproteins occurs at the structure C on the electron micrograph of cells of a gastric gland

spermatogonis/E are the in prepubertal boys, cells within the seminiferous tubules.

Satellite cells are the new skeletal muscle can be after injury is in skeletal muscle

Progesterone secretory phase of the endometrium is directly controlled by

laminin molecule that promotes adhesion of epithelial cells to the basement membrane

smooth endoplasmic reticulum is the aintedstupidgouples istic of cells

portion "B" in the electron micrograph that is directly with the proximal tubule is cell the layer that is directly for a normal adult kidney

DHGA is coming from zona recticularis region of the gland Adrenal gland due to facial coarse

Proton pump (E)is where a proton pump is

longintudinal growth: Is located at the epiphyseal plate

A epiphyseal area: epiphysea are has secondary area B-galactosidase Activity at the cell surface:A decrease in best explains woman that has milk product and pain in her stomach. incorporate choline into surfactant.Injection of 'H-labeled choline into the systemic circulation of Because they incorporate choline into surfactant

hyaline cartilage II triple helix. type mutation.

Merkel's cells are a the reduced.

longintudinal growth: Is located at the ephiphyseal plate

B proton Pump for the the high conc of protons

B is basilar memrbane has cell assoiated with axonal endings

FiberoBlast can be what makes a woud in face to decreases

The doudenum relases enezyme exocrine pancrease for the digestion of enzymes primarily

proximal convoluted tubule reabsoption for the protein from glomerous filtration has through protein

mMelanosome for the for transfere the dermar skin or other place

Thick ascending limb, absence basul interdetions . absence brushes

villis absoroption eputlehal cells can syntheszie

"Z" line or Z dsis are simillar

after mitosis the amount of Dna is A

Collagen fiber Type 2 for the matrix nasal is inhlaeed

afferent arteriole for the renin secrtung are in the Kidney