Log inSign up

MCAT Biological and Biochemical Foundations of Living Systems Flashcards: 3b Muscular System Contraction

Study 3b Muscular System Contraction in MCAT Biological and Biochemical Foundations of Living Systems with focused flashcards that help you recognize the idea, recall the key rule, and apply it in practice-style prompts.

QUESTION

What is the role of ATP hydrolysis by myosin ATPase during the cross-bridge cycle?

Tap card or press Space to flip

ANSWER

Hydrolysis cocks the myosin head into a high-energy state. ATP hydrolysis provides energy to position the myosin head in a cocked state, ready for attachment to actin upon site exposure.

1 / 25

MCAT Biological and Biochemical Foundations of Living Systems: Foundational Concept 3: Organ Systems and Homeostasis

You are hereMuscular System Structure and Contraction (3B)25 cards

All flashcards

25 cards

What this deck covers

This deck focuses on 3b Muscular System Contraction, giving you a quick way to review the definitions, rules, and examples that matter most for MCAT Biological and Biochemical Foundations of Living Systems.

How to use these flashcards

Work through these flashcards in short sessions. Try to answer each prompt before flipping the card, then revisit any cards you miss until the explanation feels automatic.

Practice questions

1 of 46Practice questions for this set
During repetitive stimulation of a skeletal muscle at 50 Hz, intracellular ATP falls from 5.0 mM to 2.0 mM while inorganic phosphate rises. The muscle begins to fail to relax fully between stimuli, producing a sustained increase in baseline tension. Assume cytosolic free Ca2+^{2+} transients remain normal in amplitude. Which factor is most likely to limit muscle contraction in the described conditions?
Choose an answer

Keep your progress across every deck

Free account · cards you mark are saved to it