Asked in Premeth Test 13 — Reproduction, Support and Movement, Immunity (15 March 2025) 2025Moderate

When more energy is required in muscle contraction then that energy can also be produced by _ as a secondary source.

Correct answer: B. Phosphocreatine

  • A. Glucose
  • B. Phosphocreatine
  • C. Fructose
  • D. Lactic acid

Explanation

After glucose, Phosphocreatine serves as a secondary source of energy.

Last updated

About Muscle Contraction

Muscle contraction is explained by the sliding filament model, in which myosin heads pull actin filaments within sarcomeres using ATP. The topic covers calcium, troponin, tropomyosin, the neuromuscular junction and relaxation, with attention to how filament length stays almost constant while the sarcomere shortens.

Practise Support and Movement

738 free Support and Movement MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.

Exams that ask Biology questions like this

Biology is on 6 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.

Related questions