Exam 10: Muscle Tissue and Organization

The _____________ is the connective tissue covering of a fascicle.

Which protein makes up the thick filaments?

______________ muscle fibers have large myoglobin stores,slow contraction velocity,and the highest resistance to fatigue.

The _____________ is the innermost connective tissue layer that surrounds each muscle fiber.

The enzyme _____________ resides in the synaptic cleft and breaks down molecules of Ach.

In a sarcomere,which letter is associated with a region within the A band that is more lightly shaded because only thick filaments are present?

Using the mandible to close your mouth as you bite on food is an example of a _________ lever.

During muscle contraction,myosin heads attach to actin and thereby form connections called ______________.

When the muscles on the posterior side of the head pull on the skull and oppose the tendency of the head to tip anteriorly,one has an example of a _____ lever.

The type of muscle fibers that are striated,form Y-shaped branches,and have junctions called intercalated discs are

Which are the reservoirs that store the calcium required for muscle contraction?

The number of satellite cells in skeletal muscle steadily decreases with age.

The type of fibers specialized to continue contracting for extended periods of time,as would be required in running a marathon,for example,are _____ fibers.

The primary function of the abdominal muscles is not to flex the spine,but to hold the abdominal organs in place.

The majority of skeletal muscle fibers in the body are _____ fibers.

A muscle whose name has "triceps" in it

______________ are Z disc proteins that anchor and interconnect the thin filament ends at either end of a sarcomere.

Which structures are reservoirs that store acetylcholine?

Pennate muscles resemble a

Which are considered specific characteristics of all muscle cells? A: Contractility B: Extensibility C: Excitability D: Elasticity E: Conductivity