Match each term listed with the correct description. Rese Wave summation Fusion of twitches: Twitch Time prior to tension: Depolarization Response to a single stimulus: Recruitment Latent period Shift in transmembrane potential toward 0 mV: Incomplete tetanus Activating more motor units: Contraction with rapid relaxation cycles:

Explain what the zone of overlap is, and how it contributes to muscle contraction (hint: include cross-bridge formation). Then describe how this impacts muscle tension at different lengths: optimal overlap, shortened (decreased length) and stretch (increased length)

When motor units are recruited to participate in tension development in a muscle, the order of recruitment is typically: Question 13 options:   from slow twitch to fast twitch   from fast twitch to slow twitch   it depends on the type of contraction   related to the size and shape of the muscle

Sketch a myogram of a single muscular twitch, and identify the latent period, period of contraction, and period of relaxation.

With muscular dystrophy, the membrane of muscle cells is destroyed. Given how muscle cells contract, which of the following would fail to happen? Reuptake of acetylcholine by the muscle cells ) Reuptake of acetylcholine by lower motor neurons ) Action potential conduction on muscle cells Action potential conduction on the lower motor neurons

HQ7. Determine whether each label describes skeletal or cardiac muscle.

Match the following types of contractions: The stimulus above which no stronger contraction can be elicited, because all motor units are firing in the muscle Determined by alternating motor units of a muscle organ even when the muscle is at rest Continued sustained smooth contraction due to rapid stimulation The situation in which contractions become stronger due to stimulation before complete relaxation occurs How a smooth increase in muscle force is produced [Choose] [Choose ] [Choose] [Choose] [Choose]

Define what the NMJ is and why it's important for muscle contraction. Explain in short the process of the NMJ signaling the muscle to contract.  Note the difference between a motor unit and the NMJ.

Which type of contraction is associated with increased skeletal muscle fiber damage?     concentric     eccentric     asymmetrical     isometric

What happens when the muscular action potential spreads through transverse (T) tubules of the sarcolemma?    The action potential in T tubules triggers the release of acetylcholine from the axon terminals of the motor neuron.   The action potential in T tubules triggers closing of sodium channels and opening of potassium channels, which enables myosin cross bridges to form.   The action potential in T tubules opens voltage-sensitive calcium channels in the T tubules, allowing calcium to flow into the sarcoplasm.   The action potential in T tubules causes a shape change in voltage-sensitive proteins that pull open calcium channels in the sarcoplasmic reticulum.