What is the purpose of motor nerve varicosities as they relate to smooth muscle?
A. They prevent single-unit smooth muscle cells from pulling apart.
B. They enable each cardiomyocyte to directly stimulate its neighbors.
C. They link the thin filaments to the inside of the sarcolemma in smooth muscle.
D. They reabsorb the decomposition products of acetylcholine after acetylcholinesterase breaks it down.
E. They release neurotransmitter molecules onto smooth muscle cells.
Answer: E
You might also like to view...
Choose the directional term to make the following sentence correct. The knee is ________ to the foot.
A) lateral
B) medial
C) superficial
D) distal
E) proximal
The average resting heart rate is normally established by the rhythm of the AV node
Indicate whether the statement is true or false
The ability of smooth muscle to contract over a wide range of lengths is called ________, while its normal background level of activity is known as ________
A) extensibility; plasticity B) elasticity; tone C) electicity; spasticity D) plasticity; tone E) plasticity; compaction
Most of the carbon dioxide in the blood is transported
A. as carbaminohemoglobin. B. as bicarbonate ions in the plasma. C. dissolved in the plasma. D. All apply.