Arrange the following steps of muscle fiber contraction in the correct sequence.1. The muscle impulse reaches the sarcoplasmic reticulum and calcium is released.2. Thin filaments are pulled over the thick filaments.3. Calcium floods the sarcoplasm and binds to troponin molecules leaving active sites.4. The impulse arrives at the synapse and travels through the transverse tubules.5. The muscle fiber shortens and contracts.6. Myosin heads bind to exposed active sites on actin, forming cross-bridges.
A. 4, 1, 3, 5, 6, 2
B. 4, 3, 6, 2, 5, 1
C. 4, 1, 3, 6, 2, 5
D. 4, 1, 3, 2, 6, 5
Answer: C
Anatomy & Physiology
You might also like to view...
Sebum has bactericidal properties
Indicate whether this statement is true or false.
Anatomy & Physiology
The ___ is (are) responsible for producing seminal fluid.
A. testes B. prostate gland C. seminal vesicles D. b and c
Anatomy & Physiology
Which vessel supplies the blood to the kidneys?
A) Suprarenal artery B) Renal artery C) Femoral artery D) Celiac trunk
Anatomy & Physiology
The temporomandibular joint is a(n) ________ joint
A) osseous B) fibrous C) bony D) cartilaginous E) synovial
Anatomy & Physiology