BIOS 256 Exam 3 Review Questions with Correct Answers

BIOS 256 Exam 3 Review Questions with Correct Answers Which formed by the chorion of the embryo and the maternal endometrium? - Answer--placenta During which stage of labor is the baby born? - Answer--expulsion Decreased airway resistance means _____ - Answer--the airways have been dilated Which dietary factor is associated with high LDL cholesterol? - Answer--saturated fatty acids One of the functional characteristics of life is irritability. This refers to _____ - Answer--sensing changes in the environment and then reacting or responding to them A good example of a positive feedback mechanism would be _____ - Answer--enhancement of labor contractions of oxytocin There are 20 amino acids in proteins and they differ by their _____ - Answer--side chain (-R) Contractile proteins of muscle mostly are _____ - Answer--fibrous proteins The speed or rate of a chemical reaction is influenced by all of the following EXCEPT _____ - Answer--the presence or absence of carbon Which is NOT a function of membranes? - Answer--storage of triglyceride -containment of interstitial fluid Cellular respiration produces _____ - Answer--ATP The neurotransmitter utilized at neuromuscular junctions is _____ - Answer--acetylcholine The sympathetic nervous system _____ - Answer--accelerates heart rate What is the main function of the rods in the eye? - Answer--vision in dim light The posterior pituitary gland is not a true endocrine gland because _____ - Answer--it is only a hormone storage area that receives hormones made by the hypothalamus for release Tropic hormones _____ - Answer--regulate the function of other endocrine glands Hormones often cause a cell to elicit multiple responses; this is because _____ - Answer--second messengers stimulate groups of enzymes The subcellular functional unit of a skeletal muscle is _____ - Answer--a sarcomere