ureteropelvic junction

junction /junc·tion/ (-shun) the place of meeting or coming together.junc´tional

---

adherent junction  a type of intercellular junction that links cell membranes and cytoskeletal elements within and between cells, connecting adjacent cells mechanically.

amelodentinal junction  dentinoenamel j.

atrioventricular junction , AV junction part or all of the region comprising the atrioventricular node and the bundle of His, with the bundle branches sometimes specifically excluded.

cementoenamel junction  the line at which the cementum covering the root of a tooth and the enamel covering its crown meet, designated anatomically as the cervical line.

dentinocemental junction  the line of meeting of the dentin and cementum on the root of a tooth.

dentinoenamel junction  the plane of meeting between dentin and enamel on the crown of a tooth.

esophagogastric junction  the site of transition from the stratified squamous epithelium of the esophagus to the simple columnar epithelium of the cardia of the stomach.

gap junction  a narrowed portion of the intercellular space containing channels linking adjacent cells and through which pass ions, most sugars, amino acids, nucleotides, vitamins, hormones, and cyclic AMP. In electrically excitable tissues, these gap junctions transmit electrical impulses via ionic currents and are known as electrotonic synapses.

Gap junctions providing passageways between the interiors of adjacent cells.

gastroesophageal junction  esophagogastric j.

ileocecal junction  the junction of the ileum and cecum, located at the lower right side of the abdomen and fixed to the posterior abdominal wall.

intercellular junctions  specialized regions on the borders of cells that provide connections between adjacent cells.

mucocutaneous junction  the site of transition between skin and mucous membrane.

mucogingival junction  the histologically distinct line marking the separation of the gingival tissue from the oral mucosa.

myoneural junction , neuromuscular junction the site of apposition between a nerve fiber and the motor end plate of the skeletal muscle which it innervates.

occluding junction  tight j.

sclerocorneal junction  corneal limbus.

tight junction  an intercellular junction at which adjacent plasma membranes are joined tightly together by interlinked rows of integral membrane proteins, limiting or eliminating the intercellular passage of molecules.

ureteropelvic junction  the junction between the ureter and the renal pelvis.

---

ureteropelvic junction,

the area where the renal pelvis meets the ureter.

---

junction [jungk´shun]

a place of meeting or coming together. adj., adj junc´tional.

atrioventricular junction in the conduction system of the heart, the junction between the atrioventricular node and the nonbranching portion of the bundle of His.

cementoenamel junction the line at which the cementum covering the root of a tooth meets the enamel covering the crown.

gap junction a narrowed portion of the intercellular space, containing channels linking adjacent cells and through which can pass ions, most sugars, amino acids, nucleotides, vitamins, hormones, and cyclic AMP. In electrically excitable tissues the gap junctions serve to transmit electrical impulses via ionic currents and are known as electrotonic synapses; they are present in such tissues as myocardial tissue.

myoneural junction (neuromuscular junction) the site of junction of a motor nerve fiber and a skeletal muscle fiber that it innervates. The discoid expansion of the terminal branch of the axon forms the motor end plate, the neurotransmitter that diffuses across the synapse is acetylcholine.

sclerocorneal junction limbus (def. 2).

ureteropelvic junction the area where the renal pelvis meets the ureter.

---

ureteropelvic

pertaining to the ureter and the renal pelvis.

---

ureteropelvic junction

junction of the renal pelvis and the ureter; strictly speaking the renal pelvis is the dilated proximal portion of the ureter.