SmarterEd

Aussie Maths & Science Teachers: Save your time with SmarterEd

HMS, BM EQ-Bank 178 MC

A netball player performs a 30-second high-intensity defensive sequence followed by 2 minutes of moderate-intensity play.

Which energy system sequence best represents this activity pattern?

  1. ATP-PCr → Aerobic → Lactic Acid
  2. Lactic Acid → ATP-PCr → Aerobic
  3. ATP-PCr → Lactic Acid → Aerobic
  4. Aerobic → ATP-PCr → Lactic Acid
Show Answers Only

Show Worked Solution

Consider Option C: ATP-PCr → Lactic Acid → Aerobic

  • ATP-PCr is first used for the immediate high-intensity defensive moves (0-10 seconds), then the lactic acid system is used for continued high-intensity work (10-30 seconds), and finally the aerobic system is relied upon for the moderate-intensity play (30 seconds onwards).

Other Options:

  • A is incorrect: Aerobic would not be the second system engaged
  • B is incorrect: Lactic acid system would not be first in this sequence
  • D is incorrect: Aerobic would not be first for high-intensity work