Lecture 8 Assignment Flashcards
Whatever quality do all muscle tissue types (skeletal, smooth, and cardiac) exhibit? ________________________.
Excitability
Muscle fibers of each skeletal muscle are organized into individual bundles called a ___________________________.
fascicle
The functional unit of a skeletal muscle fiber is the _______________________.
sarcomere
In muscle cells, thick filaments are composed of the protein _____________________.
myosin
In muscle cells, thin filaments are composed of the protein _____________________.
actin
Every skeletal muscle fiber in every skeletal muscle is innervated by a motor neuron at the __________________________.
neuromuscular junction (NMJ)
The electrical gradients across cell membranes are referred to as _____________________________.
membrane potentials
At the neuromuscular junction, the axon terminal releases a neurotransmitter called __________________________________.
acetylcholine (ACh)
When a skeletal muscle fiber contracts, the thin filaments are pulled and then slide past which other filaments? ____________________________
thick filaments
During muscle movements, if oxygen is not available, pyruvic acid is converted to ___________________.
lactic acid
In isotonic contractions, the tension in the muscle stays __________________________.
constant
What type of muscle is present in the walls of hollow organs like the urinary bladder, uterus, stomach, and intestines? ____________________________.
Smooth muscle
The end of the muscle attached to a fixed (stabilized) bone is called the ___________________________.
origin
Name the four muscles that comprise the quadriceps group.
________________________
________________________
________________________
________________________
1)Rectus Femoris
2)Vastus Lateralis
3)Vastus Medialis
4) Vastus Intermedius
Name the three muscles that comprise the hamstring group.
______________________________
______________________________
______________________________
the biceps femoris
semitendinosus
semimembranosus
