Exam 47: Musculoskeletal Systems

While lifting weights at the gym, you pause to use your fingertip to adjust the volume on your iPod.Which statement about the muscle contractions involved in adjusting the volume is true?

Refer to the graph showing world record times for running events of different durations.Each colored band in the graph (labeled 1-3) corresponds to the time courses of the three energy systems that supply fuel to the muscles. During which time period(s) are mitochondria the main source of ATP for the runner's muscles?

Depletion of muscle glycogen results in

Refer to the figure showing the growth of a long bone. How does the type of bone at E differ from that shown at G in terms of weight, and what structural differences are responsible this weight difference?

Which feature characterizes skeletal muscle contraction?

_______ chemically binds with calcium, and this complex activates myosin kinase in smooth muscle cells.

A muscle's capacity to be shortened is limited by

The type of skeleton a lobster has is a(n) _______.In order to grow larger, the lobster must molt.

How does the action of Ca²⁺ in smooth muscle contraction differ from its action in skeletal muscle?

Refer to the figure. If the structures in the figure are exposed to calcium ions, to which structure will the ions bind?

A simple _______ skeleton consists of a fluid-filled cavity controlled by muscle movement.

If the slow-twitch muscle fiber of a world-class marathon runner, a weight lifter, and a 100-meter dash Olympian were compared, which would represent the correct order, from highest to lowest, of the percentage of slow-twitch muscle in their bodies?

If we compare a vertebrate jaw and knee joints as lever systems,

Which statement about the vertebrate heart is true?

When the circular muscles of a segment in an earthworm contract, that compartment _______, and when the longitudinal muscles of a segment contract, that compartment _______.

Cells that break down bone are the _______.

An adolescent breaks a leg bone close to the ankle joint.After the break heals, that leg may not grow as long as the other one.Why?

An advantage of an endoskeleton over an exoskeleton is that an endoskeleton

Which feature characterizes slow-twitch skeletal muscle fibers?

Cartilage tissue consists of cells embedded in an extracellular matrix containing _______ fibers that give it strength and resiliency.