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.