Exocrine Glands

2021 ◽  
pp. 371-371
Keyword(s):  
Exocrine Glands

Biogenesis of Catalase-Positive Rods in Excretory Duct Cells of Salivary Glands

1976 ◽  
Vol 34 ◽  
pp. 62-63
Author(s):  
Dwight K. Romanovicz ◽  
Jacob S. Hanker
Keyword(s):  
Light Microscopy ◽  
Salivary Glands ◽  
Submandibular Gland ◽  
Excretory Duct ◽  
Exocrine Glands ◽  
Duct Cells ◽  
Peroxidatic Activity ◽  
Microscopic Studies ◽  
Different Dimensions

The presence of catalase-positive rods (Fig. 1) of different dimensions, which frequently have a crystalline appearance by light microscopy, has been reported. They seem to be related to peroxisomes which were characterized morphologically and cytochemically in parotid and other exocrine glands of the rat by Hand in 1973. Our light microscopic studies of these spherical microbodies and rods of different sizes, stained by virtue of the peroxidatic activity of their catalase, indicate that they are almost entirely confined to the cells of the striated and execretory ducts of the submandibular gland in the mouse. The rods were usually noted only in the proximity of the ductal microbodies. The latter frequently showed a tendency to appear in linear close array, or even to be contiguous (Fig. 2). This suggested that the rods could be formed by the fusion of microbodies.

scholarly journals Aquaporin water channels in exocrine glands

2000 ◽  
Vol 15 (Suppl) ◽  
pp. S7 ◽  
Author(s):  
Martin Steward ◽  
Tae Hwan Kwon
Keyword(s):  
Water Channels ◽  
Exocrine Glands

Urinary Retention Due to Severe Pseudocystic Mucoid Degeneration of the Prostatic Matrix: A Rare Urologic Manifestation of Cystic Fibrosis

2015 ◽  
Vol 95 (4) ◽  
pp. 486-488
Author(s):  
Gesa Kellermann ◽  
Aristotelis G. Anastasiadis ◽  
Desirée L. Dräger ◽  
Friedrich Prall ◽  
Oliver W. Hakenberg
Keyword(s):  
Cystic Fibrosis ◽  
Urinary Retention ◽  
Genetic Disease ◽  
Autosomal Recessive ◽  
Structural Changes ◽  
Histopathological Examination ◽  
Underlying Disease ◽  
Exocrine Glands ◽  
Mucoid Degeneration ◽  
Prostatic Enlargement

Cystic fibrosis (CF) is an autosomal recessive genetic disease, which is characterized by the production of thick mucus in exocrine glands. The main cause for morbidity and mortality in CF patients is respiratory failure. The gastrointestinal system is also commonly affected. Urologic manifestations of CF include infertility and azoospermia, nephrolithiasis, and stress urinary incontinence. In this report, we describe a 33-year-old male, who presented with recurrent urinary retention due to prostatic enlargement despite his young age. After transurethral resection, the voiding problems resolved. Histopathological examination, however, revealed a severe pseudocystic mucoid degeneration of the prostatic matrix as a cause of his subvesical obstruction. Although these structural changes are most probably due to his underlying disease, detailed histologic features have not been described in the literature.

The Exocrine Glands of the Honey Bees

Bee Products ◽  
1997 ◽  
pp. 137-150 ◽  
Author(s):  
Pierre Cassier ◽  
Yaacov Lensky
Keyword(s):  
Honey Bees ◽  
Exocrine Glands

scholarly journals Exocrine glands of Schwarziana quadripunctata (Hymenoptera, Apinae, Meliponini)

2001 ◽  
Vol 61 (3) ◽  
pp. 497-505 ◽  
Author(s):  
C. CRUZ-LANDIM ◽  
R. D. REGINATO
Keyword(s):  
Salivary Gland ◽  
Dufour Gland ◽  
Exocrine Glands ◽  
Degree Of Maturity ◽  
Gland System

This article describes the location, anatomy, histology and ontogeny of adult Schwarziana quadripunctata exocrine glands. These glands appear either as individualized organs (salivary gland system and Dufour gland) or as epidermis differentiation (tegumentary glands). Variations in the occurrence and degree of development among colony components with regard to their degree of maturity are also described.

scholarly journals A study on biochemical composition of the sting gland (poison gland) and the reservoir (poison sac) of the dwarf honey bee Apis florea F. workers

2014 ◽  
Vol 6 (1) ◽  
pp. 101-105
Author(s):  
Neelima R. Kumar ◽  
Anita Devi
Keyword(s):  
Amino Acids ◽  
Alkaline Phosphatase ◽  
Honey Bee ◽  
Biochemical Composition ◽  
Free Amino ◽  
Distal Part ◽  
Wide Spectrum ◽  
Venom Gland ◽  
Apis Florea ◽  
Exocrine Glands

The glands associated with the sting apparatus of worker honey bee Apis florea produce Venom which is known to be composed of a wide spectrum of biomolecules ranging from biogenic amines to peptides and proteins. The Venom apparatus showed the presence of two important associated exocrine glands i.e. Venom gland and Dufors gland. The secretions of both glands are apocrine and are released into the lumen to be stored in the venom sac. The presence of some exocrine cells in the distal part of venom sac which is otherwise known to only store the component of Venom gland led to the present study. The present study that there were considerable differences in the biochemical composition of Venom gland and Venom sac secretions of Apis species The concentration of lipids (Sting gland =1.423±0.0001 and Reservoir = 1.21±0.0067), proteins (Sting gland=0.440±0.0226, Reservoir = 0.390± 0.032), activity of acid phosphatase (Sting gland=112.09±21.100, Reservoir=22.63±1.467) and hexokinase (Sting gland=20.7±4.016, Reservoir=10.66±2.465) was found to be more in case of Venom gland while cholesterol(Sting gland=0.138±0.0161 reservoir=0.324±0.00323), glucose (Sting gland=189±1.31, Reservoir=321±7.19), free amino acids, and activity of alkaline phosphatase (Sting gland=21.03±0.195 Reservoir=22.4±0.685) was more in Venom sac. Glycogen was absent in both Venom gland and Venom sac of Apis species as confirmed by the absence of glucose-6-phosphatase activity. It is established from the present study that Venom sac also secretes various biochemicals and enzymes which are added to the total Venom.

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