Unit 3 Flashcards
monogastrict
single stomach
fermentative digestion
ruminants’ digestion
acetylcoline
neurotransmitter associated with parasympathetic nervous system
norepinephrine
neurotransmitter associated with sympathetic nervous system
gastric
term associated with functions or diseases related to the stomach
enteric
term associated with functions or diseases related to the duodenum, jejunum, or ileum
colonic
term associated with functions or diseases related to the colon or large intestine
emetic
drug that produces vomiting with intent to remove toxic substance before absorption
emetic center
groups of neurons in medulla of brainstem that coordinates and controls vomiting or emesis
NTS- nucleus tractus solitarius
area in emetic center that has many receptors for drugs or compounds that stimulate vomiting or suppress vomiting
chemoreceptor trigger zone
This center in the brain has receptors that detect poisons, toxins, or other compounds in the blood or cerebral spinal fluid and sends signals that stimulate vomiting.
NK-1 receptor
this receptor responds to the presence of Substance P, and blocking of this receptor reduces vomiting.
Histamine H1
These receptors are more prevalent in the dog CRTZ than the cat, and are involved in vomiting associated with motion sickness; antimotion sickness drugs work via these receptors.
Alpha receptors
These receptors are more prevalent in the cat CRTZ tha the dog, and are involved with vomiting from common sedative drugs like xylazine.
seratonin receptors
another name for 5-HT receptors
vestibular apparatus
this is the structure in the inner ear that is responsible for balance
centrally acting emetics
a type of drug that produces vomiting by stimulating receptors in the CRTZ or emetic center
gastritis
inflammation of the stomach
apomorphine
Opiod emetic agent. More effective in dogs than cats.
xylazine
Emetic agent more effective in cats than dogs. This drug is more commonly used as an injectable sedative. Alpha 2 agonist drug.
hydrogen peroxide 3%
locally acting emetic agent recommended for use, if a locally acting agent is needed. Produces gastritis, especially in cats. Needs to be fresh.
anticholinergic drug
term to describe that the drug blocks affects of actylcholine and in so doing tends to block the effects of the parasympathetic nervous system.
prokinetic drug
term applied to a type of drug to indicate that the drug increases motility int he stomach and the small intestine. Such drugs also tend to increase muscle tone of the lower esophagus reducing acid reflux of stomach contents.
relatively contraindicated
this term means that a drug should not be used unless the medical condition justifies the risk.
absolutely contraindicated
this term means that a drug should not be used regardless of the medical condition
acepromazine
Phenothiazine antiemetic also used as a common veterinary tranquilizer
dimenhydrinate, diphenhydramine
these two human drugs attach to and block H1 receptors as their mechanism to decrease the effects of motion sickness
metoclopramide
prokinetic agent and antiemetic that works by blocking dopamine (and probably seratonin) receptors on the CRTZ but also by increasing gastric and intestinal motility in the “normal” direction. This drug is still available as a human drug unlike cisapride, which is only available by compounding.
ondansetron
seratonin antagonist antiemetic used to control vomiting from cancer chemotherapy in dogs or pancreatitis in cats that is poorly controlled by other antiemetic agents
maropitant
Neurokinin-1 (NK-1) receptor antagonist antiemetic drug introduced in 2006 for control of motion induced vomiting
secretory diarrhea
type of diarrhea in which the cells along the wall of the intestinal tract pump fluid into the intestinal lumen to produce diarrhea