Unit 1 : The Human Body

Question

Lesson 2 : Holding It All Together : Muscles and Bones

1. In which way does the circulatory system rely on the skeletal system?

A. Glucose is secreted by compact bone as an energy source for blood.
B. Spongy bone stores minerals needed by blood cells
C. Bones provide a source of oxygen to blood
***D. Blood cells are produced in bone marrow.

2. A rock climber climbs up the rock wall. How do the bones and muscles in his arm interact to allow him to climb up?

A. All of the muscles in his arm contract as he climbs up.
***B. His arm muscles work in pairs so that one contracts while the other relaxes as he climbs up.
C. His arm muscles work independently of each other as he climbs up.
D. All of his arm muscles relax as he climbs up.

3. Muscles located in the walls of the small intestine help push digested material along. Muscles located in the walls of arteries help push blood along. Based on this information and your understanding of muscle types, which of the following statements is correct?

***A. Both sets of muscles are involuntary and smooth
B. Both sets of muscles are voluntary and smooth
C. Both sets of muscles are smooth, although one set is voluntary, and the other set is involuntary.
D. Both sets of muscles are voluntary, although one set is striated, and the other set is smooth.

Which of the following sets of words best fills in the blanks in the following sentence?
Despite their _____ structure, human bones are surprisingly _____.

***A. hollow ; strong
B. solid ; lightweight
C. compact ; flexible
D. spongy ; fragile

100% correct, have a good day!