Recent Lessons

Show all results for ""

Feature Overview

Ace your exams with our all-in-one platform for creating and sharing quizzes and tests.

Quizzes

Create quizzes and tests automatically from your content using AI.

Flashcards

Automatically turn your notes into digital flashcards.

Share, Export & Embed

Share with classmates or export to Excel and your learning management system.

Stats & Reporting

Auto-grading quizzes and tests with detailed stats and reports.

Mobile Apps

The smarter way to study – wherever you are.

Pricing

Search...

Muscle Contraction and Sliding Filament Theory Quiz

9 Questions

2 Views

Muscle Contraction and Sliding Filament Theory Quiz

Choose a study mode

Play Quiz

Study Flashcards

Spaced Repetition

Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the role of calcium ions in muscle contraction?

Activate myosin cross bridges to attach to actin (correct)

Promote the breakdown of ATP in muscle cells

Prevent the sliding of myosin along the actin filaments

Inhibit myosin cross bridges from attaching to actin

What is the common reason for muscle fatigue?

Lack of actin-binding sites

High levels of calcium ions

Excess ATP production

Oxygen debt (correct)

What happens when a muscle is unable to contract even when stimulated?

Muscle fatigue (correct)

Reduced calcium ion levels

Enhanced actin-binding capacity

Excessive ATP production

How does accumulation of lactic acid affect muscle contraction?

Increases acidity and reduces ATP production Signup and view all the answers

What is the role of acetylcholine (ACh) in muscle contraction?

It opens sodium channels on the sarcolemma Signup and view all the answers

What happens at the peak of depolarization in the muscle cell?

K+ gates fully open Signup and view all the answers

What causes hyperpolarization in the muscle cell?

Potassium gates opening Signup and view all the answers

What is the function of the sodium-potassium pump in muscle cells?

To pump sodium out of the cell and potassium into the cell Signup and view all the answers

What is the consequence of reaching the threshold potential (-55mV) in the muscle cell?

Voltage-gated Na+ channels open, causing depolarization Signup and view all the answers