Human Biology End Of Semester Exam And Complete Answers 2024.

Tight junction - Answer junction which hold cells tightly together to prevent leaking; found in the urinary & digestive tract Adhesion junction - Answer junction where cells are not actually touching, but rather held together by intercellular filaments; found in the skin and heart muscle (allows flexibility) Gap junction - Answer connect cytoplasm of adjacent cells, only allow certain small molecules through; found in smooth muscle & heart (helps synchronize electricital activity) Acid - Answer increase H+ concentration; 1-6 pH Base - Answer decrease H+ concentration; 8-14 pH Cell - Answer smallest unit of life confounding variables - Answer variable which could have caused error in an experiment stom - Answer basic unit of matter atomic mass - Answer # of protons + # of neutorons atomic # - Answer # of protons isotope - Answer atoms with same # of protons, but varying # of neutrons