Vet.Physiology Flashcards
Fermentation in the gastro-intestinal tract of carnivores occurs in?
Large intestine
What organelle performs intracellular digestion?
Lysosomes
When contraction of a whole muscle belly occurs without relaxation, the muscle is said to be in state of?
Tetany
The rapid depolarization of the membrane after threshold is reached and reached by the entry of this ion into the cell.
Sodium (Na)
What do you call the myelinated part of the neuron?
Axon
The P wave component of a normal complex is caused by the depolarization of the?
Atria
The neuromuscular junction is the synapse between a neuron and a:
Skeletal muscle
This substance mediates fibrinolysis.
Plasma
Polymorphonuclear cells (PMNs) is also known as:
Neutrophils (Basophils and eosinophils)
The volume of distribution of this substance approximates the volume of the ECF compartment.
Evan’s Blue
Site of tricarboxylic acid (TCA) cycle.
Mitochondria
What are the cells that posses least negative resting membrane potentials?
Smooth muscles - 50 mv
When the blood comes from the system circulation, it enters the heart via?
Vena cava
The volume of the blood pumped out of the heart per minute is called:
Cardiac output
The portion of the nephron referred to as the renal corpuscle:
Glomerulus + bowman’s capsule
Which WBC is most numerous in goats, sheep, cows and pigs?
Lymphocytes
Approximate life span of erythrocyte (RBC) in most domestic animals?
80-150 days
Which of the ff.most accurately approximates the amount of blood in an animal?
a. 2% of BW
b. 16% of BW
c. 8% of BW
d. 24% of BW
8%
Icterus is present in a dog upon physical examination and severe liver disease is apparent. Which form of bilirubin is most likely cause of the icterus?
Free bilirubin
Where is erythropoietin produced?
Kidney
It is the ability of the cat to land on its feet when dropped from a position of its feet in a skyward direction is known as?
Righting reflex
Because of its greater work, the heart chamber with the greatest muscle mass is the:
Left ventricle
It is the maintenance of constant environment within the body.
Homeostasis
T/F: The negative feedback loops are homeostatic?
True
T/F: The positive feedback loops are homeostatic?
False: Not homeostatic
It negates or oppose the initiating factors or stimulus and is a series of change that return the factor toward a certain mean values.
Negative feedback loops
It is also known as the vicious cycle because it does not lead to stability but to instability and often death.
Positive feedback loops
All of the following are examples of what feedback mechanism?
After hemorrhage
Blood pressure drops
Hearts ability to pump blood decreases
Harmful Positive Feedback
T/F: Most of the proteins present in the cell membranes are glycoproteins?
True
Its function is to transport hydrophilic polar substances and ions across the membrnes and to act as signalling or transducing sites to conduct messages across the cell membrane.
Cell membrane
