Asked by Blake Mieser on May 25, 2024
Verified
To begin the actual contraction, calcium ions must first bind to ____ in the muscle cell.
A) actin
B) myosin
C) troponin
D) sarcoplasmic reticulum
E) T tubules
Calcium Ions
Charged calcium particles (Ca2+) that play critical roles in biological processes, including muscle contraction, neurotransmitter release, and cell signaling.
Troponin
A regulatory protein in the actin filaments of muscle fibers.
Actin
Actin is a globular protein that forms filaments, which are crucial for various cellular processes including muscle contraction and cell motility.
- Classifying different tissues and their exclusive roles within the human anatomy.
Verified Answer
GM
Guillermo munizMay 26, 2024
Final Answer :
C
Explanation :
Calcium ions bind to troponin on the thin filaments (actin filaments) in muscle cells, which initiates the contraction process by causing a conformational change that allows myosin to bind to actin.
Learning Objectives
- Classifying different tissues and their exclusive roles within the human anatomy.