18 Questions
What is the function of the teat meatus in a cow?
To prevent the escape of milk between two milkings
Which part of the suspensory system in cows has great tensile strength?
Median suspensory ligament
What is the main function of the median suspensory ligament in cows?
Allow for increased weight of the gland
What is the average size for fore teats in cows?
6.6 cm long and 2.9 cm in diameter
Which part of a cow's teats consists of convex epithelial projections that form a star-shaped slit?
Teat meatus
What happens to the sphincter muscles in a cow when it is being milked?
They relax to allow the orifice to open
What is the primary factor responsible for the decrease in milk production as lactation progresses?
Loss of secretory epithelial cells
Which vein carries less than 10% of the blood leaving the udder?
Perineal vein
What is the approximate blood flow per hour when a cow produces 60 liters of milk per day?
$1250$ liters
From which vein does the Subcutaneous abdominal vein (milk vein) exit the mammary gland?
External iliac vein
What is the term used to describe the process of programmed cell death leading to a decrease in milk production?
Apoptosis
Which vessel carries blood away from the mammary gland anti-parallel to the arteries?
$CMA ext{&}V$ (caudal mammary artery and vein)
What is the purpose of post-milking germicidal teat dips?
To minimize the chance of bacteria entering the mammary gland
In the mammary gland, what is the limiting factor for the milk producing capacity of the udder?
Number of secreting cells
What happens when milk ejection is induced by the release of oxytocin?
Contraction of myoepithelial cells
What is the structure that surrounds groups of lobules in the mammary gland?
Connective tissue sheath
Why is it important to keep cows standing for a while after milking?
To minimize teat end contamination before closure
What is the function of tactile teat stimulation in milk ejection?
To induce myoepithelial contraction for milk ejection
Learn about the crucial role of blood supply in mammary function, including the process of milk production and circulation through the udder. Understand how the volume of blood flow correlates with milk production levels and the impact on lactation.
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