BIOB34H3 Chapter Notes - Chapter 7, 4: Chromatin, Covalent Bond, Peristalsis

• School: UTSC
• Department: Biological Sciences
• Course: BIOB34H3
• Professor: Blake Aaron Richards

Document Summary

2nd law of thermodynamics: if an isolated system undergoes internal change, the direction of the change is always toward greater disorder. In terms of thermodynamics, animals must function as open systems (system that is not isolated) Without energy input, the (cid:271)lood (cid:272)oursi(cid:374)g through a(cid:374) a(cid:374)i(cid:373)al"s (cid:272)ir(cid:272)ulatory syste(cid:373) (cid:449)ill slo(cid:449) to a halt, vital molecules will lose their critical structural and functional properties, positive and (cid:374)egati(cid:448)e io(cid:374)s (cid:449)ill distri(cid:271)ute the(cid:373)sel(cid:448)es ra(cid:374)do(cid:373)ly a(cid:272)ross a(cid:374) a(cid:374)i(cid:373)al"s (cid:373)e(cid:373)(cid:271)ra(cid:374)es. Loss of order would eventually kill the animals as order is essential for life. Animals require energy from the outside because the energy is necessary to create and maintain their essential internal organization. 4 main types of energy: chemical, electrical, mechanical and heat. Chemical energy: energy required when atoms rearrange into new configurations: animals obtain the energy they need to stay alive by reconfiguring atoms in food molecules.