Asked by Amber McDaniel on Jul 01, 2024
Verified
Four of the five answers listed below are molecules that directly participate in muscle contraction within a muscle fiber. Select the exception.
A) acetylcholine
B) ATP
C) calcium
D) actin
E) myosin
Acetylcholine
A neurotransmitter in the nervous system that plays a crucial role in muscle movement and various brain functions.
Myosin
A type of protein found in muscle cells that, along with actin, facilitates muscle contraction.
Actin
A protein that forms the cytoskeletal filaments involved in muscle contraction and cellular movement.
- Comprehend the biochemical and physical mechanisms that facilitate muscle contraction and movement.
Verified Answer
ZK
Zybrea KnightJul 07, 2024
Final Answer :
A
Explanation :
Acetylcholine is a neurotransmitter that binds to receptors on the muscle fiber to initiate the release of calcium ions, which in turn triggers muscle contraction. However, acetylcholine itself does not directly participate in muscle contraction within the muscle fiber. The other options (ATP, calcium, actin, and myosin) all play direct roles in muscle contraction.
Learning Objectives
- Comprehend the biochemical and physical mechanisms that facilitate muscle contraction and movement.