7.1 Functions of Muscular System Flashcards
Movement within the body is accomplished by what three things?
- Cilia or flagella on the surface of cells
- Force of gravity
- CONTRACTION OF MUSCLES- most movement
What are the types of muscle tissues?
- Cardiac
- Skeletal
- Smooth
What are the major functions of the muscular system?
- Movement-
contraction of skeletal muscles - Posture-
skeletal muscles maintain tone - Respiration-
contraction of thoracic cage muscles and diaphragm - Body heat production-
muscle contraction gives off heat
5.communication-
muscles are involved in how we talk and communicate - Constriction of organs and vessels- contraction of smooth muscle within the walls of internal organs and vessels causes them to constrict.
- Contraction of the heart- beating, propelling blood to all parts of the body
What’s the location of skeletal muscle ?
Attached to bones (by tendons)
Where is smooth muscle found?
Walls of hollow organs, blood vessels, and glands
Where is cardiac muscle found ?
The heart
skeletal muscle- nucleus
multiple, peripherally located
smooth muscle- nucleus
single, centrally located
cardiac muscle- nucleus
single, centrally located
skeletal muscle- striations (y/n)
yes
skeletal muscle- -control
voluntary and involuntary (reflexes and twitches)
skeletal muscle- function
body movements
smooth muscle- cell to cell attachments
gap junctions join some smooth muscle cells together
smooth muscle- striations (y/n)
no
smooth muscle- control
involuntary
smooth muscle- function
move food thru digestive tract, empty bladder, regulating the blood vessel diameter, contracting many gland ducts
cardiac muscle- cell to cell attachments
inter calculated discs
cardiac muscle- striations
yes
cardiac muscle- control
involuntary
cardiac muscle- function
pumps blood, contractions provide force for propelling blood thru the blood vessels
