CPT Poultry Anatomy & Physiology 2

Question 1

What is the normal body temperature range for a healthy adult chicken?

Accepted Answer

105–107°F (40.6–41.7°C)

Answer

Chickens maintain a core body temperature of approximately 105–107°F (40.6–41.7°C), which is significantly higher than the human norm due to their elevated metabolic rate.

Question 2

Which hormones work together to regulate calcium mobilization and eggshell calcification in laying hens?

Accepted Answer

Parathyroid hormone (PTH) and estrogen

Answer

PTH mobilizes calcium from bone and increases intestinal absorption, while estrogen stimulates medullary bone formation and calcium transport proteins, both essential for eggshell calcification.

Question 3

What is the approximate resting heart rate of an adult chicken?

Accepted Answer

250–300 beats per minute

Answer

Adult chickens have a resting heart rate of roughly 250–300 beats per minute, reflecting the high cardiac output needed to sustain their elevated metabolic rate and body temperature.

Question 4

What is the Harderian gland in poultry and what role does it play?

Accepted Answer

A lacrimal gland behind the eye that produces mucus and plays a role in ocular immune defense

Answer

The Harderian gland is located in the posterior orbit of the eye and secretes mucus to lubricate the nictitating membrane; it also contains lymphoid tissue important for local immune responses.

Question 5

What is the primary function of the ceca (cecal pouches) in poultry?

Accepted Answer

Microbial fermentation of undigested fiber and water reabsorption

Answer

The paired ceca harbor a dense microbial community that ferments dietary fiber and produces short-chain fatty acids; they also reabsorb water and electrolytes from cecal contents.

CPT - Certified Poultry Technician Practice Test

CPT - Certified Poultry Technician Practice Test

CPT Poultry Anatomy & Physiology 2