To review:
The mode of glandular secretion when the DNA (deoxyribonucleic acid), RNA (ribonucleic acid), and membrane components are present.
Introduction:
The different modes of glandular secretion include the eccrine (merocrine), apocrine, and holocrine secretion. In the merocrine secretion, the cell is not destroyed and remains intact. Rather, the secretory product is packaged into secretory vesicles and is released onto surface of the cell through exocytosis. For example, secretions from globlet cells in the intestine. During the apocrine secretions, only the apical portion of the cell’s cytoplasm is shed off to release secretory product. For example, secretions from lactiferous cells of the mammary glands.
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Chapter 3 Solutions
EP HUMAN ANATOMY-MODIFIED MASTERING ACC
- Secretory vesicles fuse with the cell membrane to release their contents to the outside of the cell. In this process, the membrane of the secretory vesicle becomes part of the cell membrane. Because small pieces of membrane are continually added to the cell membrane, we would expect the cell membrane to become larger and larger as secretion continues. However, the cell membrane stays the same size. Explain how this happens.arrow_forwarda. Which class of extracellular matrix is not seen in the figure above? b. Which type of stress does the extracellular matrix in Question 1 help to resist? c. With the function of this extracellular matrix stated in Question 2, name two types of tissue where this extracellular matrix is abundantly foundarrow_forwardGive the following (a.) cell, (b.) description, and (c.) type of fiber present in tissues below: 1. Mesenchyme 2. Wharton's jelly of umbilical cordarrow_forward
- Define each of these terms: a freely permeable membrane, an impermeable membrane, and a selectively permeable membrane. During your next exam, you may begin to sweat a solution of sodium, chloride, and water, but not proteins, sugars, or nucleotides. Are the membranes of your sweat gland cells freely permeable, impermeable, or selectively permeable?arrow_forwardThe glandular secretions contain a large number of which different chemical substances?arrow_forwardRETICULAR CONNECTIVE TISSUE Describe this tissue. A. ["contains collagen fibers arranged "regularly" in bundles", B."fine interlacing network of reticular fibers and reticular cells", C."fine interlacing network of elastic fibers and chondrocytes"] What is the location where this tissue can be found? A. ["stroma of liver, spleen, lymph nodes; red bone marrow; reticular lamina of basement membrane; around blood vessels and muscles", B."forms tendons, most ligaments, aponeuroses", C."fasciae, reticular region of the dermis, pericardium, periosteum, perichondrium, joint capsules, membrane capsules around organs, heart valves"] What is the function of this tissue type? A. ["strength, elasticity, support", B."tensile strength", C."forms stroma of organs; binds smooth muscle tissue; filters and removes work out blood cells in spleen and microbes in lymph nodes"] ADIPOSE CONNECTIVE TISSUE What is the main cell type in this tissue?…arrow_forward
- Draw the structure of glandular epithelium?arrow_forwardn which type of secretion do cell products accumulate in the cytoplasm before the entire cell disintegrates? Multiple Choice Exocrine Holocrine Aprocrine Endocrine Autocrinearrow_forwardThe trans epithelial electrical resistance (TEER) is a characteristic property of an epithelium. Which of the following statements best describes the TEER? a.) A high trans epithelial electrical resistance (TEER) is an indicator of a leaky epithelium in which paracellular diffusion of solute is likely to be high b.) A high trans epithelial electrical resistance (TEER) is an indicator of a tight attachment between the epithelium and the basement membrane in which diffusion of solute across the basolateral surface is likely to be low c.) A high trans epithelial electrical resistance (TEER) is an indicator of a tight epithelium in which paracellular diffusion of solute is likely to be lowarrow_forward
- Match the terms with the most suitable description. ___ exocrine gland a. strong, pliable; like rubber ___ endocrine gland b. secretion through duct ___ cartilage c. deep skin layer ___ dermis d. contracts, not striated ___ smooth muscle e. assist and support neurons ___ bone f. makes skin dark ___ melanin g. lines lungs ___ blood h. cells in a hardened matrix ___ neuroglia i. fluid connective tissue ___ brown fat j. ductless secretion ___ simple squamous epithelium k. many mitochondria produce heatarrow_forwardall the following statements which relate to apical surface modifications(brush border) of epithelial cells are true except. * these are anchored in a dense mat of microfilaments in the apical cytoplasm called the terminal, lateral web. The apical surface of cells in intestine is usually covered with microvilli. the microfilaments can contract, By interacting with cytoplasmic myosin, then caused the shortening of the microvilli. cores of microvilli are composed of parallel actin microfilaments.arrow_forwardMatch the following to their proper description (answers may be used more than once). Exocrine glands Endocrine glands Goblet cells Goblet cells Merocrine secretion Holocrine secretion Apocrine secretion Endocrine glands Mucus Are unicellular glands. Have lost connection with the surface epithelium. Involves exocytosis of proteins or glycoproteins. Involves the discharge of secretory product with some cytoplasm and plasmalemma. Involves the disruption and shedding of the whole cell after being filled with secretory product. Is a hydrated form of the hydrophilic glycoproteins called mucins. Occur in the lining of the small intestine and the respiratory tract. Produce hormones. Retain connection with the surface epithelium.arrow_forward
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