Bio 1040 - Chapter 30, How Animals Move Study Guide Graded A+

The age at which bone mass is greatest is ______. - between 30 and 40 years of age for both men and women - between 30 and 40 years of age for women, and 40 and 50 for men - between 30 and 40 years of age for men, and 40 and 50 for women - between 20 and 30 years of age for women, and 40 and 50 for men - between 40 and 50 years of age for women and men {Ans: between 30 and 40 years of age for both men and women}Appendicular skeleton {Ans: bones comprised of appendages & those that anchor them to the axial skeleton.}The "Z" line {Ans: - made up of a single huge protein molecule called "connectin". - gets its name because it appears to zig-zag under the EM.}Chitin and protein in Arthropods. {Ans: Must be shed to permit growth.}the M line {Ans: the pale region in the middle of the A band.}Rib cage {Ans: protects heart & lungs.}Smooth {Ans: involuntary muscles of the internal organ systems (except the heart)}Why is a newly molted crab unusually slow and clumsy? A. It temporarily lacks an exoskeleton.