9.1: There are three types of muscle tissue
The prefix myo and mys mean
muscle
What does neural control allow the heart to do ?
speed up for brief periods
Describe stabilize joints in muscle function
Even as they pull on bones to cause movement, they strengthen and stabilize the joints of the skeleton.
What enables muscle tissue to perform duties ?
Excitability (responsiveness), contractility, extensibility, and elasticity
Explain the ability of contraction in skeletal muscle
It can contract rapidly, but it tires easily and must rest after short periods of activity
Describe generate heat in muscle function
Muscles generate heat as they contract, which plays a role in maintaining normal body temperature.
Deine Muscle Fibers
Skeletal and smooth muscle cells (but not cardiac muscle cells) are elongated,
Describe produce movement in muscle function
Skeletal muscles are responsible for all locomotion and manipulation. They enable you to respond quickly to jump out of the way of a car, direct your eyes, and smile or frown.
True or False Cardiac muscle tissue can and does contract without being stimulated by the nervous system.
True
True or False Skeletal muscle is also remarkably adaptable.
True
True or False Cardiac muscle usually contracts at a fairly steady rate set by the heart's pacemaker.
True
Describe maintain posture and body position in muscle function
We are rarely aware of the skeletal muscles that maintain body posture. Yet these muscles function almost continuously, making one tiny adjustment after another to counteract the never-ending downward pull of gravity.
How does blood course through the body
because of the rhythmically beating cardiac muscle of your heart and the smooth muscle in the walls of your blood vessels, which helps maintain blood pressure.
Three key words to remember when discussing cardiac muscle tissue
cardiac, striated, and involuntary
The prefixes sacro means
flesh reference to muscle
What is the role of smooth muscle tissue?
force fluids and other substances through internal body channels
How does smooth muscle tissue regulate the passage of substances through internal body openings?
forms valves
Smooth muscle tissue forms the arrector pili muscles attached to ___
hair follicles
Is cardiac muscle voluntary or involuntary?
involuntary
Where is smooth muscle tissue located?
is found in the walls of hollow visceral organs, such as the stomach, urinary bladder, and respiratory passages.
Describe excitability of muscle tissue
is the ability of a cell to receive and respond to a stimulus by changing its membrane potential.
Describe elasticity of muscle tissue?
is the ability of a muscle cell to recoil and resume its resting length after stretching
Describe extensibility of muscle tissue?
is the ability to extend or stretch. Muscle cells shorten when contracting, but they can be stretched, even beyond their resting length, when relaxed
Example of excitability of muscle tissue?
neurotransmitter released by a nerve cell
What kind of control does skeletal muscle have ?
often activated by reflexes, voluntary muscle because it is the only type subject to conscious control.
Where is cardiac muscle tissue located ?
only in the heart, where it constitutes the bulk of the heart walls.
What locomotion is the skeletal muscle responsible for ?
overall body mobility
What are the four important functions of the body that muscles perform
produce movement, maintain posture and body position, stabilize joints, and generate heat
Smooth muscle tissue dilate and constricts _______
pupils of eye
______ longest muscle cells and have obvious stripes called striations
skeletal muscle fibers
What tissue is packaged into the skeletal muscles organs that attach to and cover the skeleton.
skeletal muscle tissue
When you think of skeletal muscle what three words are key
skeletal, striated, and voluntary
Describe contractility of muscle tissue?
the ability to shorten forcibly when adequately stimulated. This ability sets muscle apart from all other tissue types
Smooth muscle in organs of the digestive, urinary, and reproductive tracts propels substances through ________
the organs and along the tract.
Key words to remember when discussing smooth muscle tissue ?
visceral, nonstriated, and involuntary