Tag: organ and organ systems in animals

Quizzes (10) Questions (16)

Questions Related to organ and organ systems in animals

Multiple choice frog - control and coordination system frog animal diversity - ii (phylum: chordata) organ and organ systems in animals zoology

A frog with crushed brain is pinched on the leg. The leg is drawn away. It is

  1. Automatic motor response

  2. Neurotransmitter induced response

  3. Conditional reflex

  4. Simple reflex
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The withdrawal of a leg in response to a stimulus in a brain-crushed frog is a classic example of a simple reflex, which is mediated by the spinal cord and does not require higher brain centers.

Multiple choice frog - control and coordination system frog animal diversity - ii (phylum: chordata) organ and organ systems in animals zoology

What is true about buccophayngeal respiration in frog-

  1. Sternohyal muscle contracted-Buccal air pumped into lungs. petrohyal muscle cotractedpulmonary air pumped out.

  2. Sternohyal muscle contracted-atmospheric air sucked in, petrohyal muscle contract-Buccal air pumped out

  3. Sterohyal muscle relaxed-atmospheric air pumped out, petrohyal muscle contracted-Buccal air pumped into lungs

  4. None
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In buccopharyngeal respiration, the contraction of sternohyal muscles lowers the floor of the buccal cavity to draw in air, while the contraction of petrohyal muscles raises the floor to pump air into the lungs or out of the mouth.

Multiple choice frog - control and coordination system frog animal diversity - ii (phylum: chordata) organ and organ systems in animals zoology

What happens if ophthalmic branch of trigeminal is cut in frog?

  1. Frog dies

  2. Frog becomes blind

  3. Frog loses its capacity of sensing

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The ophthalmic branch of the trigeminal nerve is a sensory nerve in frogs that carries sensory information from the snout and head region. Cutting it results in a loss of sensation in those areas.

Multiple choice frog - control and coordination system frog animal diversity - ii (phylum: chordata) organ and organ systems in animals zoology

Insufficient production of ______ in the tadpoles leads to the incomplete development.

  1. Thyroid

  2. Thyroxine

  3. Iodine

  4. Larve
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The process of growth and development is regulated by thyroxine hormone which is produced by thyroid gland. Iodine is required for thyroxine production. Thus insufficient production of thyroxine in the tadpoles leads to the incomplete development.

Multiple choice frog - control and coordination system frog animal diversity - ii (phylum: chordata) organ and organ systems in animals zoology

Tadpoles growing in ___________ water shows retarded growth.

  1. Iodine deficient

  2. Iodine rich

  3. Magnesium deficient

  4. Magnesium rich
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The process of growth and development is regulated by thyroxine hormone which is produced by thyroid gland. Iodine is required for thyroxine production. That is why retarded growth is seen in tadpoles living in iodine deficient water. 

Multiple choice frog - control and coordination system frog animal diversity - ii (phylum: chordata) organ and organ systems in animals zoology

For the metamorphosis of tadpoles which of the following element must be available in water?

  1. Chlorine

  2. Carbon

  3. Sulphur

  4. Iodine
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In an insect or an amphibian, the process of transformation from an immature form to an adult form in two or more distinct stages is known as metamorphosis. For the metamorphosis of tadpoles, thyroid hormone along with the essential constituent iodine is necessary.

Multiple choice frog - control and coordination system frog animal diversity - ii (phylum: chordata) organ and organ systems in animals zoology

Which of the following statement is true with reference to
teeth in frog

  1. The lower jaw is toothless

  2. The upper jaw is toothless

  3. Both lower and upper jaws are toothless

  4. Both lower and upper jaws are toothed
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The lower jaw of frog is toothless. Teeth are present on premaxillae , maxillae of upper jaw.

Multiple choice frog - control and coordination system frog animal diversity - ii (phylum: chordata) organ and organ systems in animals zoology

One of the examples of the action of the autonomous neural system is ____________.

  1. Swallowing of food

  2. Pupillary reflex

  3. Peristalsis of the intestine

  4. All of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Autonomous neural system controls and coordinates the involuntary activities of various organs. It regulates involuntary activities of the body i.e., activities that are not under the will power of the animal, e.g. swallowing of food, pupillary reflex, peristalsis of the intestine, etc.