Saladin Ch24: Water, Electrolyte, and Acid-Base Balance Flashcards
Where are the largest quantities of water found in the body?
ICF (intracellular fluid)
What is water loss through respiring (breathe) and cutaneous transpiration? How much water is lost through this each day?
Insensible water loss; 700mL/day
What is the dominant cation that creates both an osmotic and electrical gradient, and influences water and Cl- homeostasis?
sodium
What is the cation that is in high concentration in the ICF and imbalances are the most dangerous of electrolytes
Potassium
What involves rehydration of blood to inhibit thirst long-term?
blood osmolarity
What has the most powerful influence over the pH balance of the ICF because of concentrations in cells?
protein buffers
What works with the respiratory system to expel carbon dioxide and the kidneys to excrete bicarbonate and hydrogen ions?
bicarbonate buffer system
What type of water loss results from sweat, urine formation, fecal moisture, breath and cutaneous transpiration, and how much water is lost through this?
obligatory water loss, 400mL /day
This physiological buffer system works the fastest, but limited by quantity
Respiratory system
This physiological buffer system buffers the largest quantity, but is limited by time
urinary system
Passive anion strongly attracted to sodium and potassium, most abundant anion in teh ECF
chloride ions
Condition that lowers blood volume and blood pressure and leads to an increase in blood osmolarity
Dehydration
condition of excess fluid sequestration, usually in interstitial spaces
Edema
The “salt retaining hormone” that causes increased sodium and decreased potassium to be reabsorbed
aldosterone
Major cation that influences muscle contractions, second messenger systems, exocytosis, and blood clotting
calcium
Anion compounds found concentrated in the ICF; components of nucleic acids plasma membrane, and ATP
phosphates
Compounds placed in water will ionize freely and release H+ in solution
acids
Compounds placed in water will ionize freely and release OH- or take up excess H+
Bases
Water ingested as food and drink
preformed water
Water formed as a by-product of aerobic respiration metabolism and dehydration synthesis reactions
metabolic water
The digestive tract is made up of
Oral cavity, pharynx, esophagus, stomach, small intestine, large intestine
The accessory digestive organs include
Teeth, tongue, salivary glands, liver, gallbladder, and pancreas
Ingestion takes place when
materials enter the oral cavity. An active process involving conscious choice and decision making
The crushing and shearing that makes materials easier to propel along the digestive tract. Increases surface area to make more susceptible to enzymes
mechanical processing
Digestion refers to
the chemical breakdown of food into small organic fragments
Secretion refers to
the release of water, acids, enzymes, buffers, and salt by teh epithelium of the digestive tract and glandular organs
Absorption refers to
The movement of molecules across the digestive epithelium and into the interstitial fluid of the digestive tract
excretion refers to
removal of wates from the body
The digestive epithelium and its secretions provide a ____ defense against bacteria
nonspecific
The abdominopelvic cavity contains the ___ cavity
peritoneal
A swelling of the abdomen caused by an increase in peritoneal fluids is
ascites
Mesenteries serve to….
Provide a route for blood vessels, nerves, and lymphatic tissues and also stabilize the position of the attached organs
After embryonic development, the ventral mesentery becomes the
lesser omentum - between stomach and liver
falciform ligament - between liver and anterior abdominal wall
The lesser omentum functions by
stabilizing the stomach and provides an acces route for vessels leaving the liver
The falciform ligament functions by
Stabilizing the liver relative to the diaphragm and abdominal wall
Peritonitis is
An inflammation of the peritoneal membrane. Can be caused by rupture of the appendix
The greater omentum hangs like an ______ from the ______ and ______ borders of the stomach
Apron, lateral, inferior
” Beer belly” is an accumulation of fat in the
Greater omentum
All but the first 25 cm of the small intestine is suspended by the
Mesentery proper
The pancreas and duodenum are ______ because they lie posterior to the peritoneal cavity
Retroperitoneal
The mesocolon is associated with
A portion of the large intestine
During normal development the mesocolon fuses which structures to the posterior body wall?
Ascending colon, descending colon, and rectum making them retroperitoneal
The four layers of the digestive tract from deep to superficial are
Mucosa
Submucosa
Muscularis externa
Serosa
What is the function of enteroendocrine cells?
Secreting hormones that coordinate the activities of the digestive tract and accessory glands
The mucosal epithelium is either
Simple or stratified
A simple columnar epithelium is located where
Absorption occurs
Blood vessels, sensory nerve endings, lymphatic vessels, secretory cells of mucous glands, and smooth muscle cells are located in the
Lamina propria
The network of intrinsic nerve fibers and scattered neurons make up the
Submucosal plexus
The enteric nervous system is primarily innervated by the
Parasympathetic division of the ANS
The serosa is absent in the
Oral cavity, pharynx, esophagus and rectum. Replaces by the adventitia
The muscular layers of the digestive tract consist of _______ muscle tissue
Visceral smooth
Pacesetter cells are located in the
Muscularis mucosae and the muscularis externa.
Segmentation is the
Churning and fragmenting of the bolus that mixes the contents with intestinal secretions
The superior surface of the tongue and the opposing surface of the hard palate are covered by a
Layer of keratinized cells to protect against abrasion
The mucosa inferior to the tongue is thin enough and vascular to permit
Rapid absorption of lipid soluble drugs such as Nitroglycerin
The lingual papilllae is located on the
Dorsum of the body of the tongue
Ducts from two pairs of salivary glands open on either side of the
Lingual Frenulum
Ankyloglossia is
An overly restrictive lingual frenulum that prevents normal eating or speach
Lingual lipase functions by
Beginning lipid digestion in the mouth and continuing in the stomach (Specifically triglycerides)
The large extrinsic tongue muscles perform
All gross movements of the tongue
The smaller intrinsic tongue muscles function by
Changing the shape of the tongue and assisting in precise movements such as speech
Intrinsic and extrinsic tongue muscles are under the control of the _____ cranial nerves.
Hypoglossal
Salivary amylase is secret by the _____ salivary glands
Parotid
The _____ salivary glands produce a mucous secretion that acts as a buffer and lubricant
Sublingual
The _____ salivary glands secrete a mixture of buffers, glycoproteins (mucins) , and salivary amylase.
Submandibular. Empties on either side of the lingual frenulum
The salivary glands produce _____ liters of saliva each day
1.0-1.5
Buffers in saliva keep the pH of the mouth near
7.0