Answer: Contains much less protein than blood plasma.
- A Contains red blood cells in similar numbers to blood
- B Has a higher protein concentration than blood plasma
- C Contains much less protein than blood plasma
- D Is transported only by active pumping from a dedicated lymph heart in mammals
Correct answer: C. Contains much less protein than blood plasma
Explanation: Lymph is formed from tissue fluid and has a lower protein content than blood plasma, since large plasma proteins do not readily filter out of blood capillaries into the surrounding tissue spaces.
A single ECG cycle: the P wave marks atrial depolarisation (contraction signal), the large QRS complex marks ventricular depolarisation, and the T wave marks ventricular repolarisation (recovery) before the next cycle begins.
Concept context
Blood, lymph, the heart, the cardiac cycle, blood pressure, and ECG. High NEET weightage.