practice questions for the final quarter of Biology 150 Chapter 45: 1. Steroid hormone receptor proteins are found a. on the target cell membrane b. inside the nucleus of a target cell c. floating in plasma d. in the cytoplasm of the target cell e. inside the nucleus of a neurosecretory cell 2. Which of the following is NOT an endocrine gland? a. ovary b. adrenal glands c. thymus d. hypothalamus e. bulbourethral gland Chapter 46: 3. During oogenesis, which cell goes directly through the second meiotic division? a. a primary oocyte from an oogonium b. a secondary oocyte that has been penetrated by a sperm c. the first polar body d. an unfertilized secondary oocyte e. both b. and d. 4. This gland secretes about 60% of the fluid found in human semen, most of which is mucus, amino acids and fructose. a. prostate gland b. pancreas c. seminal vesicles d. seminiferous tubules e. bulbourethral gland 5. Spermatogenesis is a continuous process in human males. Place the following products of spermatogenesis in the correct order: a. primordial germ cell-spermatogonium-primary spermatocyte- secondary spermatocyte-spermatid-sperm cells b. primary spermatocyte-spermatogonium-primordial germ cell-secondary spermatocyte-spermatid-sperm cells c. spermatogonium-primary spermatocyte-primordial germ cell-secondary spermatocyte-spermatid-sperm cells d. spermatogonium-primordial germ cell-primary spermatocyte-secondary spermatocyte-spermatid-sperm cells e. primordial germ cell-primary spermatocyte-secondary spermatocyte- tertiary spermatocyte-spermatid-sperm cells 6. Inhibition of the production of gonadotropin releasing hormone (GnRH) from the hypothalamus will: a. stimulate production of estrogen & progesterone b. initiate ovulation c. inhibit secretion of gonadotropins from the pituitary d. stimulate secretion of LH & FSH e. initiate the flow phase of the menstrual cycle Chapter 47: 7. Depolarization of the plasma membrane in sea urchins causes the fast block to polyspermy. What causes the slow block to polyspermy in sea urchins? a. the cortical granules release enzymes that harden the external plasma membrane of the egg b. the cortical reaction hardens the jelly coat of the egg c. the sperm binds to the protein receptors which causes the external plasma membrane to harden d. the capacitated sperm binds to the egg membrane which repolarizes the egg e. the acrosomal process of the sperm binds to a cortical granule which hardens the vitiline layer of the egg 8. In sea urchin fertilization, species specificity is ensured by recognition between: a. a protein on the acrosomal process and receptors on the eggÕs vitelline layer b. a protein on the acrosomal process and receptors on the eggÕs jelly coat c. a protein on the capacitated sperm and receptors on the eggÕs vitelline layer d. a protein on the uncapacitated sperm and receptors on the eggÕs cortical granules e. a protein on the acrosomal process and receptors on the eggÕs cytoplasm Chapter 48: 9. Schwann cells and oligodendrocytes perform the same function for the PNS and the CNS, respectively. That is: a. regulate entry of Na+ ions into excitatory cells b. mediate depolarization during transmission of nerve signals c. myelinate axons to protect and speed the signal d. secrete calcium ions at an electircal synapse e. they are responsible for maintaining homeostasis of calcium ions 10. Which part of the vertebrate nervous system is most involved in preparation for fight or flight? a. sympathetic b. somatic c. central d. autonomic e. parasympathetic