Question

A neurogenic heart is characteristic of

• A. Lower vertebrates
• B. Humans
• C. Rat
• D. Rabbit

Answer 1

The correct option is A

Lower vertebrates

The correct option is A.

Explanation for the correct option:

Option A:

1. In the neurogenic heart, the nerve from the brain initiates cardiac movement.
2. A neurogenic heart is found in lower invertebrates like annelids and arthropods.
3. The heartbeat is initiated by the ganglion situated near the heart.
4. The impulse for contraction is generated by the nervous system.
5. They have a sac-like heart and blood does not flow through the vessels
6. In a myogenic heart, the muscles present in the heart initiates cardiac movement.
7. The myogenic heart is found in vertebrates. This kind of heart is called a human heart which can beat on its own and doesn’t need any external impulse.
8. The impulse is generated by a pacemaker in the heart.
9. This kind of heart is present in rats, rabbits, humans, and other mammals too.

Explanation for the incorrect options:

Option B:

Humans come under the class of vertebrates, hence they have a myogenic heart.

Option C:

Rats are mammals, hence they have a myogenic heart.

Option D:

Rabbits are mammals, hence they have a myogenic heart

Final answer: A neurogenic heart is characteristic of Lower vertebrates.