Practice Exam V Bio 1107 Choose the best most complete answer 1 During ovulation all of the following occur EXCEPT a b c d Rupture of the mature follicle Estradiol production reaches its lowest point LH plasma levels surge progesterone levels begin to increase 2 Which of the following is generally the site of fertilization a Ovary b oviduct c Fundus of uterus d Cervix e Vagina 3 Action potentials have three distinct phases and 4 Summation a Is caused by a combining of several local potentials b Can occur when two action potentials arrive simultaneously at two different presynaptic terminals c Can occur when two action potentials arrive in very close succession at a single presynaptic terminal d All of the above 5 The corpus luteum secretes progesterone which negatively feeds back and inhibits the release of a b c d ABP and ICSH LH and ICSH LH and FSH FSH and TSH 6 Action potentials are conducted more rapidly in a Small diameter axons than large diameter axons b Large diameter axons than small diameter axons c Unmyelinated axons than myelinated axons d Axons that lack a wrapping of Schwann cells 7 At the axon terminals voltage gated channels open in response to the arriving AP This triggers to fuse with the axon terminal membrane and release into the 8 If the corpus luteum in Humans degenerates after ovulation then a b c d progesterone levels will also decline LH and FSH will immediately surge the endometrium s thickness and vascularization will be maintained none of the above would apply 9 A growing enlarged follicle in the human ovary would a b c d e increase the production of progesterone increase the production of estradiol encourage the positive feedback on LH both a and c are correct both b and c are correct 10 Plasma cells and Helper T cells both secrete antibodies a This statement is true b This statement is false 11 A humoral response could ultimately a b c d e lead to the production of antibodies discourage pathogen viral membrane binding to host cells lead to pathogen cell death only a and b would apply a b and c would apply 12 Macrophages are examples of a Antibody secreting T lymphocytes b Antigen presenting cells c Activated plasma cells d All of the above 13 True or False The lag time of the secondary immune response is greater than the lag time of the primary immune response a This statement is true b This statement is false 14 An increase in body temperature helps repel pathogens by a Increasing the rate at which WBC s can be mobilized b Accelerating repairs c Inhibiting pathogen growth d All of the above 15 The endocrine system a Releases chemicals into the bloodstream for distribution throughout the body b Releases hormones that can alter the metabolic activities of many different tissues and organs c Produces effects that can last for hours days or even longer d Can alter the gene activity of cells e All of the above 16 Upon stimulation endocrine cells in the anterior pituitary could release a oxytosin b GH c TSH d both b and c would apply e both a and b would apply 17 Which of the following cells is responsible for myelin formation in the peripheral nervous system a Astrocytes e Satellite cells b Oligodendrocytes c Schwann cells d Microglial cells 18 As thyroid hormone levels increase tissue O2 consumption will 19 As PTH levels increase plasma Ca2 will 20 IgE a class of antibody a triggers the release of glucagons b produces mast cells c produces cytotoxic T cells d triggers the release of histamine from basophils and mast cells 21 In a muscle fiber actin filaments are attached at the a M line b Z line c S line d A line 22 Negative feedback on the hypothalamus after ovulation is achieved by a b c d e continued formation of the corpus luteum increased levels of FSH increased levels of progesterone both a and b are correct both a and c are corrrect 23 Graded contraction of a muscle can be achieved by a b c d e controlling the contraction of a single muscle fiber controlling the number of muscle fibers that contract varying the rate of fiber stimulation both a and b are correct both b and c are correct 24 Activated Cytotoxic T cells are non phagocytic a This statement is true b This statement is false 25 The primary ion involved in a muscle fiber contraction is a Na1 b Cl1 c Ca2 d Mg2 26 If at a node of Ranvier in a Human nerve cell the axon is more negative inside 10mV then at a minimum at that node a b c d e a membrane potential has been created a resting potential has been created an action potential has been generated hyperpolarization is occurring None of the above would apply Answer Key 1 b 2 b 3 depolarization repolarization and hyperpolarization 7 Ca synaptic vesicles neurotransmitter synaptic cleft 11 e 12 b 13 b 21 b 22 e 23 e 14 d 24 a 15 e 16 d 25 c 17 c 26 a 8 a 9 e 18 increase 4 d 5 c 6 b 19 increase 20 d 10 b