CPT Poultry Anatomy & Physiology 3

Question 1

In a commercial laying hen, approximately how long does it take from ovulation to oviposition (egg lay)?

Accepted Answer

24–26 hours

Answer

The total transit time through the oviduct is approximately 24–26 hours, which is why hens typically lay one egg per day when in peak production.

Question 2

In the hen's oviduct, which section is responsible for depositing the shell membranes around the egg?

Accepted Answer

Isthmus

Answer

The isthmus is the narrow section of the oviduct where the inner and outer shell membranes are formed around the albumin-covered yolk before the egg moves to the uterus for calcification.

Question 3

Where are the testes located in a male chicken (rooster)?

Accepted Answer

Internally within the abdominal cavity, near the cranial kidneys

Answer

Unlike mammals, roosters have internal testes located retroperitoneally near the cranial pole of the kidneys, which means sperm are maintained at body temperature rather than a cooler scrotal temperature.

Question 4

What are the chalazae in a hen's egg?

Accepted Answer

Twisted, rope-like strands of dense albumen that anchor the yolk centrally within the egg

Answer

The chalazae are spiral-twisted cords of thick albumen attached to opposite poles of the yolk; they suspend the yolk in the center of the egg and rotate to keep the germinal disc oriented upward.

Question 5

Which section of the hen's oviduct is responsible for depositing the bulk of the egg white (albumen) around the yolk?

Accepted Answer

Magnum

Answer

The magnum is the longest section of the oviduct and secretes the dense and thin layers of albumen (egg white) over approximately 3 hours as the egg passes through.

CPT - Certified Poultry Technician Practice Test

CPT - Certified Poultry Technician Practice Test

CPT Poultry Anatomy & Physiology 3