Muscle system test #3

Front

all of the characteristics of the sarcoplasm of muscle fibers.

Back

Myofibrils, Many nuclei, Many mitochondria

Front

The ___and the ___ are made of dense irregular connective tissue while the ___ is made of areolar loose connective tissue.

Back

epimysium/perimysium, epimysium/perimysium, endomysium

Front

________ are places where the sarcolemma folds into the muscle fiber. They function to bring action potentials to all parts of the sarcoplasm

Back

T tubules

Front

characteristics of cardiac muscle.

Back

Branched, 1 or 2 nuclei, Activity is involuntary, Contains intercalated discs

Front

Individual muscle cells (fibers) are wrapped in ______

Back

endomysium

Front

List the structures of the skeletal muscle from largest to smallest.

Back

epimysium, perimysium, endomysium

Front

___ muscle is most likely to be found in the heart. ____ muscle is most likely to be found attached to bones and ___ muscle is most likely found in hollow organs and blood vessels. All of these three muscle tissues exhibit a quality called ____ which is when their plasma membranes can change their electrical states (from polarized to depolarized) and send an action potential along the entire length of the membrane.

Back

cardiac, skeletal, smooth, excitability

Front

steps of muscle contraction in order.

Back

1. Ach is released
2. Na+ channels open
3. Membrane of muscle fiber depolarizes
4. Ca+ channels open
5. Ca+ binds to troponin

Front

What chemical messenger do the neurons at the neuromuscular junction release to begin muscle excitation-contraction coupling?

Back

acetylcholine

Front

Which of the following is a function of smooth muscle?

Back

helps regulate and control movements and processes throughout the body