Asked by Kyara Negra on Jun 16, 2024
Verified
What is a cross-bridge?
A) A protein found along the groove of the F-actin double helix
B) A T tubule and two adjacent terminal cisternae
C) The combination of myosin heads with active sites on actin molecules
D) The movement of myosin head while attached to actin myofilament
E) After exercise, the O2 taken in that exceeds the O2 required for resting metabolism
Cross-bridge
The connection formed between the actin filament and the myosin head during muscle contraction.
Myosin Heads
Protrusions on myosin filaments in muscle cells that bind to actin filaments to generate muscle contraction.
Actin Molecules
Protein filaments that are part of the cytoskeleton in all eukaryotic cells, playing key roles in cell movement and shape.
- Acquire knowledge about the configuration and purpose of muscular parts including the triad and myofilaments.
Verified Answer
TA
thewilderbeast adamsJun 17, 2024
Final Answer :
C
Explanation :
Cross-bridges refer to the connections formed between myosin heads and active sites on actin filaments during muscle contraction.
Learning Objectives
- Acquire knowledge about the configuration and purpose of muscular parts including the triad and myofilaments.