NEET 1999 · Class 11

Body Fluids and Circulation

Sympathetic nervous system induces

  1. (A)secretion of digestive juices
  2. (B)heart beat
  3. (C)secretion of saliva
  4. (D)all of these

The NCERT line that answers it

Verbatim line

Neural signals through the sympathetic nerves (part of ANS) can increase the rate of heart beat, the strength of ventricular contraction and thereby the cardiac output.

Chapter
Body Fluids and Circulation
Section
15.5 REGULATION OF CARDIAC ACTIVITY
Page
9
Words matched
26 of 26

The answer appears as a continuous sentence in NCERT. This is that sentence.

How this line gives the answer

5, emb=1.0, combined=0.8). Verified: high — The span explicitly states that sympathetic nerves increase the rate of heart beat, which directly matches option B and distinguishes it from the other options.

We did this for 1,565 questions.

Every one traced to the exact sentence in NCERT that answers it, including 90% of the 2026 paper. Sit a mock on the real NEET 2027 computer interface and every mark you drop comes back with its line attached.

Take the free 5-minute checkMore from this chapter

Question text is reproduced from the published NEET 1999 paper for study and commentary. NCERT text is quoted, not redistributed; textbooks remain at ncert.nic.in. Our mapping method, including its measured error rates, is published at /methodology.