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...

Motor Units and Neuromuscular Junctions Quiz

12 Questions

1 Views

Motor Units and Neuromuscular Junctions 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

Which type of motor unit is responsible for gross contractions in skeletal muscle?

Small motor units

Large motor units (correct)

Motor units are not responsible for contractions

Both large and small motor units

What is the main elimination method for acetylcholine (ACh) at the neuromuscular junction?

Enzymatic degradation (correct)

Reuptake

Diffusion through the blood

All of the above

Which receptors are involved in the end plate of skeletal muscle?

No receptors are involved

Nicotinic 1 (N1 or Nm) (correct)

Nicotinic 2 (N2 or Nn)

Both N1 and N2 receptors

Which protein inhibits the binding site for myosin heads on actin filaments?

Tropomyosin Signup and view all the answers

What is the function of Troponin I in the sarcomere?

Inhibits tropomyosin Signup and view all the answers

Which band in the sarcomere contains both thick and thin filaments?

A band Signup and view all the answers

Which ion is released into the cytoplasm during excitation-relaxation coupling in skeletal muscle?

Calcium ions Signup and view all the answers

What is the role of acetylcholine (ACh) in excitation-relaxation coupling in skeletal muscle?

It triggers the opening of cation channels Signup and view all the answers

Where are nicotinic receptors located in skeletal muscle?

End plate Signup and view all the answers

During muscle contraction, what happens to troponin-tropomyosin complex?

It is removed from the myosin binding sites on actin Signup and view all the answers

What is the role of ATP in muscle contraction?

It allows myosin heads to detach from actin and reattach to another binding site Signup and view all the answers

How is muscle relaxation achieved?

By the sequestration of calcium ions by SERCA Signup and view all the answers