Exam 27: Skeletons, Muscles, and Movement

A hydrostat generates energy as it creates pressure.

Muscle fibers contain only actin while sarcomeres contain both actin and myosin.

Animals that swim expend less energy to move than do animals that walk or fly because

Which of the following statements about bone tissue is false?

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

Cartilage bends more easily than bone does.

The axial skeleton includes the

Which of the following is a likely explanation as to why terrestrial animals do not have a skeleton built of entirely cartilage?

Which of the following series correctly describes the organization of muscle tissue from smallest to largest component?

The matrix of cartilage tissue is made up of

In the contraction of a sarcomere, which of the following "walks" its way along filaments?

Which of the following animals has a skeleton made of carbohydrates linked with proteins?

A hydrostat stiffens when a muscles contract around a body cavity filled with a _________.

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

Soft-bodied animals rely on _______ for support.

Muscle contraction is caused by

A myofibril

In human embryos, the skeleton starts out as cartilage and is later replaced by bone.

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.