Structural Organization in Animals
Test 4

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following is the excretory product of frogs?

Ammonia
Urea
Uric acid
Creatinine
2

Frogs excrete urea as their primary nitrogenous waste and are classified as ureotelic animals.

Which of the following organs in a frog is responsible for producing digestive enzymes?

Liver
Pancreas
Gall bladder
Kidney
2

The pancreas produces pancreatic juice, which contains digestive enzymes for breaking down carbohydrates, proteins, and fats.

What is the role of the fat bodies in frogs during reproduction?

Produce hormones
Provide energy for gamete production
Aid in digestion
Facilitate fertilization
2

Fat bodies store energy, which is utilized during reproduction for gamete production and development.

Which of the following statements about frog respiration is correct?

Frogs respire only through their lungs.
Frogs use cutaneous respiration in water and pulmonary respiration on land.
Frogs have gills throughout their life for respiration.
Frogs rely only on buccal respiration for gas exchange.
2

Frogs use their skin for respiration in water (cutaneous respiration) and lungs for respiration on land (pulmonary respiration).

Which of the following statements about the frog’s endocrine system is correct?

The thyroid gland regulates metamorphosis in frogs.
The pancreas does not function as an endocrine gland.
Frogs do not have an adrenal gland.
The pituitary gland only controls digestion.
1

The thyroid gland in frogs regulates metamorphosis from the tadpole to the adult stage.

Which of the following statements about the frog’s skeletal system is incorrect?

Frogs have an internal skeleton made of bones.
The vertebral column provides body support.
Frog skeletons are composed entirely of cartilage.
Frog skulls are bony structures protecting the brain.
3

The frog's skeleton is made primarily of bones, not cartilage.

What is the function of the hepatic portal system in frogs?

Transport oxygenated blood to the lungs
Carry blood from intestine to the liver
Regulate heartbeat
Store digestive enzymes
2

The hepatic portal system in frogs carries nutrient-rich blood from the intestine to the liver for metabolism.

Which of the following structures is absent in the frog’s body?

Liver
Diaphragm
Lungs
Kidneys
2

Frogs lack a diaphragm; they use buccal pumping to aid in respiration.

Which chamber of the frog’s heart pumps blood to the body?

Right atrium
Left atrium
Ventricle
Sinus venosus
3

The ventricle of the frog's heart pumps mixed oxygenated and deoxygenated blood to the body.

Which of the following statements about the skeletal system of frogs is correct?

Frogs have an exoskeleton made of chitin.
The skeleton of a frog is entirely cartilaginous.
Frogs have an endoskeleton made primarily of bones.
Frogs do not have a vertebral column.
3

Frogs have an endoskeleton composed mainly of bones, supporting their body structure and movement.

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