Smooth muscle cells
stretched
After a long meal, the stomach may be considerably ___
oxygen
Response to __ levels occurs in the smooth muscle of the lungs and blood vessels
relaxes
Smooth muscle of the stomach __ after being stretched and then begins contracting.
pacemakers
Specialized smooth muscle cells called __ coordinate contraction because they behave like nerves and set rhythm for smooth muscle cells to contract.
rhythm
Specialized smooth muscle cells called pacemakers coordinate contraction because they behave like nerves and set __ for smooth muscle cells to contract.
involuntary
Smooth muscle is ___ muscle.
dense
A network of intermediate filaments anchors the contractile proteins at the __ bodies
contractile
Arrangement of __ proteins - Smooth muscle has no sacromeres. Actin and myosin are arranged in a spiral
spiral
Arrangement of contractile proteins - Actin and myosin are arranged in a __
no
Arrangement of contractile proteins - Smooth muscle has __ sacromeres
varicosities
At smooth muscle, axons terminates in swellings called __ that deliver neurotransmitter to all nearby smooth muscle cells.
viscera
Blood vessels and most of the __, for instance, the stomach, intestines, and bladder, have walls of smooth muscle
actin
Myosin uses ATP to push __.
respond
Skeletal muscles __ only to neurotransmitter.
respond
Smooth muscle can __ to neurotransmitter, hormones, pH, and oxygen levels.
entire length
Smooth muscle can contract after being stretched because myosin heads occur along the __ __ of myosin in smooth muscle.
spindle
Smooth muscle cells are __ shaped
gap junctions
Smooth muscle cells are able to coordinate their activity because they are connected by __ __
sheets
Smooth muscle cells are arranged in __ and must contract together.
skeletal
Smooth muscle cells are tiny compared to __ muscle.
nucleus
Smooth muscle cells have one __
skeletal
The process of contraction in smooth muscle is similar to __ muscle
oxytocin
__ is a hormone that stimulates smooth muscle of the uterus to contract during labor
Innervation
__ of smooth muscle also helps coordinate coordinate contractions.
Calcium
__ released from the sarcoplasmic reticulum is a signal for contraction.