Exam 31: Skeletons, Muscles, and Movement

Lobsters, insects, and many other invertebrate groups have a(n)____________________, an external skeleton that surrounds and encloses the soft tissues it supports.

Flying and swimming animals share the features of streamlined bodies to reduce drag and appendages with ____________________ surfaces to efficiently push against air or water.

Which of the following statements about support structures is true?

The heart of a moose contains both cardiac and smooth muscle.

Where would you not expect to find spongy bone?

One of the most common knee injuries involves the tearing of the anterior cruciate ligament (ACL). How would an injury like this affect the function of the knee?

The illustration below

In the skeleton of a house cat, compact bone forms the hard, white outer region, and ____________________ bone lies inside the compact bone.

An athlete with torn cartilage in the knee should expect

The blue whale reduces drag with its streamlined shape and also its ____________________.

A single muscle fiber from a flea can lift about the same weight as a single muscle fiber from a human.

Tendons are connective tissues that connect ____________________ to bone.

Cartilage bends more easily than bone does.

Examine the figure below. Which letter indicates a region of a human where you would find muscle that lacks sarcomeres?

Someone trying to increase muscular strength should

Specialized bone cells, called ____________________, are surrounded by calcium and phosphate compounds.

Muscle contraction is caused by

Ostriches are huge nonflying birds that can run at speeds of up to 40 miles per hour over long distances and maintain speeds of 30 miles per hour over longer distances. The legs of ostriches probably contain mostly ____________________ muscle fibers.