Topics:
Animal Physiology, Animal Refresher
Match: Anatomical Structures and Their Descriptions
View Complete Answer & Explanation
Question (English)
Match the column:
| TABLE-I | TABLE-II |
|---|---|
| 1) Rumen | a) Natural pacemaker |
| 2) Reticulum | b) Vocal organ of mammals |
| 3) SA node | c) Largest chamber of ruminant stomach |
| 4) ANP | d) Vocal organ of birds |
| 5) Larynx | e) Heart muscles |
| 6) Syrinx | f) Smallest chamber of ruminant stomach |
- 1-c, 2-f, 3-a, 4-e, 5-b, 6-d ✓ Correct
- 1-c, 2-f, 3-a, 4-b, 5-e, 6-d
- 1-c, 2-e, 3-a, 4-f, 5-b, 6-d
- 1-f, 2-c, 3-a, 4-e, 5-b, 6-d
Explanation:
Correct Answer: 1-c, 2-f, 3-a, 4-e, 5-b, 6-d
Explanation of Each Match
- 1-c) Rumen → Largest chamber of ruminant stomach: The rumen is the largest of the four stomach compartments (~80% of stomach volume in adults). It contains billions of microorganisms for fermentation.
- 2-f) Reticulum → Smallest chamber of ruminant stomach: The reticulum is the smallest compartment. It is connected to the rumen (together called reticulorumen) and initiates regurgitation.
- 3-a) SA node → Natural pacemaker: The Sinoatrial (SA) node located in the right atrium is the natural pacemaker of the heart. It generates spontaneous electrical impulses (automaticity) at the highest rate (~70–80/min in humans), setting the heart rate.
- 4-e) ANP → Heart muscles: Atrial Natriuretic Peptide (ANP) is secreted by atrial muscle cells (cardiomyocytes) of the heart in response to increased blood volume/pressure. It promotes renal Na⁺ excretion and reduces blood pressure.
- 5-b) Larynx → Vocal organ of mammals: The larynx (voice box) is the organ of phonation in mammals. It contains the vocal cords that vibrate to produce sound.
- 6-d) Syrinx → Vocal organ of birds: Birds have a larynx, but it does not produce sound. Instead, the syrinx (located at the junction of the trachea and bronchi) serves as the vocal organ in birds, producing their characteristic calls and songs.
