Rather than tightly coupled synapses between neurons and muscle cells, single-unit smooth muscle contains
A. varicosities of a subset of muscle fibers so that individual cells can be separately stimulated.
B. plaques and caveolae that contain multiple hormone receptors for discrete endocrine control.
C. gap junctions that connect neurons to smooth muscle cells.
D. diffuse junctions where neuron varicosities are responsible for neurotransmitter release.
Answer: D
You might also like to view...
Which statement about the ganglion is true?
A. A ganglion is a group of dendrites that create a bulge in the spinal nerve. B. A ganglion is found in the dorsal roots of the spinal nerves. C. A ganglion is a group of cell bodies in the bipolar neurons. D. A ganglion is associated with spinal nerves that carry efferent messages.
Cardiac muscle tissue ________
A) is under the control of the voluntary (conscious) nervous system B) is striated, like skeletal muscle tissue C) is found in the heart and major blood vessels D) has spindle-shaped cells, like smooth muscle tissue
Ptosis (drooping of the upper eyelid) of the left eye would be caused by damage to the ________ nerve.
A. optic B. abducens C. trochlear D. oculomotor E. facial
Each staff member must know the veterinarian's abilities and time frames to schedule procedures
Indicate whether the statement is true or false