SCIENCE 132Week 6 Quiz 21.0/ 24.0 Points

Week 6 Quiz Return to Assessment List Comment:Joshua, Your short answer and lab report questions for week 6 have been graded. Scott Nunnelly Part 1 of 6 - 21.0/ 24.0 Points Question 1 of 32 3.0/ 3.0 Points The development of a goiter indicates that ________.  A. the anterior pituitary is abnormally enlarged  B. there is hypertrophy of the thyroid’s follicle cells  C. there is an excessive accumulation of colloid in the thyroid follicles  D. the anterior pituitary is secreting excessive growth hormone  E. Both B and C are correct. Feedback:Good work; your answer is correct! Question 2 of 323.0/ 3.0 Points The two major organ systems that participate in relatively “long distance” communication in order to control and coordinate actions in the body are the _______ system and the _______ system.  A. Skeletal; muscular  B. Muscular; integumentary  C. Muscular; nervous  D. Cardiovascular; endocrine  E. Nervous; endocrine Feedback:Good work; your answer is correct! Question 3 of 32 3.0/ 3.0 Points Which of the following is an anterior pituitary hormone? A. Insulin  B. Cortisol  C. ADH  D. oxytocin  E. TSH Feedback:Good work; your answer is correct! Question 4 of 32 0.0/ 3.0 Points The female’s uterus secretes the following hormone:  A. None  B. hPL C. Progesterone  D. Estrogen  E. FSH Feedback:The uterus does not synthesize nor secrete any hormones. Question 5 of 32 3.0/ 3.0 Points The gonads produce what class of hormones?  A. amine hormones  B. neurotransmitters  C. steroid hormones D. catecholamines  E. peptide hormones Feedback:Good work; your answer is correct! Question 6 of 32 3.0/ 3.0 Points The parathyroid glands are small structures located on the posterior thyroid gland that produce parathyroid hormone (PTH), which regulates blood ________ levels.  A. thyroid hormone  B. adrenalin  C. insulin  D. potassium  E. calciumFeedback:Good work; your answer is correct! Question 7 of 32 3.0/ 3.0 Points The signaling done by the endocrine system is accomplished by the use of chemicals called _______.  A. electrons  B. electrical signals  C. transmitters  D. hormones  E. action potentials Feedback:Good work; your answer is correct! Question 8 of 32 3.0/ 3.0 Points Hormones regulate certain target cell responses. These can include which of the following? A. All of the above are correct.  B. Metabolism  C. Growth and development of tissue  D. Sexual function  E. Fluid balance Feedback:Good work; your answer is correct! Part 2 of 6 - 15.0/ 21.0 Points Question 9 of 32 3.0/ 3.0 Points In the testes, sperm cells replicate and differentiate in the _________.  A. urethra B. seminiferous tubules  C. ductus deferens  D. tunica albuginea  E. septum Feedback:Good work; your answer is correct! Question 10 of 32 3.0/ 3.0 Points The male reproductive gland which produces a fructose-rich solution which nourishes sperm and constitutes about 60% of the volume of semen is:  A. seminal vesicles  B. prostate C. corpus spongiosum  D. bulbourethral  E. testes Feedback:Good work; your answer is correct! Question 11 of 32 3.0/ 3.0 Points All of the following statements concerning oogenesis are correct EXCEPT:  A. Ova develop from stem cells called oogonia.  B. Upon fertilization, a secondary oocyte completes meiosis II  C. At birth, a female infant’s ovaries contain primary oocytes.  D. One oogonium produces one and only one ovum E. Oogenesis occurs from puberty until death. Feedback:Good work; your answer is correct! Question 12 of 32 3.0/ 3.0 Points The interstitial cells of the testes:  A. differentiate into spermatocytes  B. produce testosterone  C. undergo meiosis  D. produce estrogen  E. reside inside the seminiferous tubules Feedback:Good work; your answer is correct!Question 13 of 32 3.0/ 3.0 Points The tunica albuginea is a ___________.  A. set of ducts inside the prostate gland  B. dense connective tissue covering of an ovary or testis  C. membrane which covers the entrance to the vagina  D. serous membrane which suspends the ovaries, uterine tubes, and uterus  E. tube that conducts the ovum to the uterus Feedback:Good work; your answer is correct! Question 14 of 32 0.0/ 3.0 Points All of the following are true of spermatogenesis EXCEPT:  A. One spermatogonium produces 4 spermatids B. Genetically diverse spermatids are created.  C. DNA replicates once, but cells divide twice.  D. Spermatids containing 23 chromosomes (1n) are produced.  E. The products are spermatozoa that each have a head, midpiece and tail. Feedback:Spermatogenesis is the process by which spermatogonia stem cells undergo DNA replication followed by 2 meiotic cell divisions, producing 4 haploid (1n or 23 single chromosomes each) cells. Spermiogenesis follows cell divisions and is the process by which the spermatid loses cytoplasm, undergoes condensation of its nucleus, and grows a midpiece with mitochondria and a flagellum. Question 15 of 32 0.0/ 3.0 Points If the average length of a woman’s ovarian cycle is 30 days, the average length of her uterine cycles is most likely ____ days.  A. 7 B. 30  C. 15  D. 21  E. 10 Feedback:Anterior pituitary hormones (FSH and LH) cause the cyclical release of estrogen and progesterone by the ovaries every 28 days (with variations between women). Ovarian hormones cause uterine cycle endometrial changes. Thus, ovarian and uterine cycles are coordinated and last about the same number of days in a particular woman. Part 3 of 6 - 12.0/ 21.0 Points Question 16 of 32 0.0/ 3.0 Points How is a zygote transported to the uterus?  A. the uterine tube is lined with cilia and undergoes peristalsis  B. the uterine tube is lined with microvilli C. the zygote migrates by ameboid movement  D. gravity  E. the zygote has a flagellum Feedback:After fertilization in the uterine tube, the zygote is transported to the lumen of the uterus by wavelike contractions of smooth muscle tissue in the walls of the uterine tubes called peristalsis as well as the waving motions of fingerlike cilia which project from the surface of epithelial cells lining the tubes. Question 17 of 32 0.0/ 3.0 Points “False labor” or Braxton Hicks contractions are weak, irregular contractions of the myometrium triggered by _________.  A. low levels of oxytocin  B. low levels of progesterone  C. high levels of testosterone D. high blood levels of estrogen  E. high levels of prostaglandin Feedback:In contrast to true labor wherein rising levels of oxytocin and prostaglandin stimulate vigorous, rhythmic contractions of the uterine myometrium to expel the fetus, “false labor” or Braxton Hicks contractions are weak, irregular contractions of the myometrium triggered by very high blood levels of estrogen during the last few weeks of pregnancy. Question 18 of 32 3.0/ 3.0 Points All of the following events occur during the embryonic period of growth EXCEPT development of __________.  A. bone tissue  B. blood cells in the liver  C. genitalia by which sex can be determined  D. 4 limbs E. a heart capable of pumping blood Feedback:Good work; your answer is correct! Question 19 of 32 3.0/ 3.0 Points The inner cell mass of the trophoblast developments into the primary germ layers which are named the _______, _______, and _______.  A. epithelium, muscle, nervous, connective  B. zygote, morula, blastocyst  C. endometrium, myometrium, perimetrium  D. endoderm, ectoderm, mesoderm  E. zygote, embryo, fetusFeedback:Good work; your answer is correct! Question 20 of 32 0.0/ 3.0 Points Which hormone is responsible for mammary gland development at puberty?  A. prolactin  B. oxytocin  C. estrogen  D. follicle stimulating hormone  E. luteinizing hormone Feedback:The female sex steroid hormone estrogen is responsible for stimulating mammary gland development and size increases during puberty. Question 21 of 32 3.0/ 3.0 Points The placenta is formed by endometrial tissue of the uterine lining and the ________. A. inner cell mass of the trophoblast  B. chorionic villi of the trophoblast  C. yolk sac  D. amnionic fluid  E. myometrium of the uterus Feedback:Good work; your answer is correct! Question 22 of 32 3.0/ 3.0 Points In the months preceding birth, the hormone which causes pelvic ligaments to become more flexible to enable widening of the pelvis during delivery is ________.  A. prostaglandin  B. human chorionic gonadotropin C. luteinizing hormone  D. relaxin  E. prolactin Feedback:Good work; your answer is correct! Part 4 of 6 - 21.0/ 21.0 Points Question 23 of 32 3.0/ 3.0 Points The channels that provide for the movement of potassium in the resting neuron are _______.  A. voltage gated  B. leakage and chemically gated  C. leakage D. chemically gated Feedback:Correct! Question 24 of 32 3.0/ 3.0 Points The minimum voltage that is required to generate an action potential is called the _______.  A. trigger voltage  B. propagation voltage  C. depolarization voltage  D. threshold voltage Feedback:Correct! Question 25 of 32 3.0/ 3.0 Points When measuring refractory periods, as the interval between stimuli decreases, the depolarization needed to generate the second action potential: A. stays the same  B. increases  C. decreases Feedback:Correct! Question 26 of 32 3.0/ 3.0 Points How did increasing the stimulus voltage in the simulation affect the action potential?  A. an increase in the rate of propagation of the action potential  B. an increase in the size of the action potential  C. no change to the action potential D. a decrease in the rate of propagation of the action potential Feedback:Correct! Question 27 of 32 3.0/ 3.0 Points During the absolute refractory period, a neuron would need to be depolarized by _____ mV before another action potential could be generated.  A. 50 mV  B. 75 mV  C. 100 mV  D. Another action potential cannot be generated Feedback:Correct! Question 28 of 32 3.0/ 3.0 Points What effect did increasing the extracellular potassium have on the resting membrane potential? A. The resting membrane potential became less negative.  B. The resting membrane potential disappeared.  C. The resting membrane potential became more negative.  D. The resting membrane potential did not change. Feedback:Correct! Question 29 of 32 3.0/ 3.0 Points What effect did decreasing the extracellular sodium have on the resting membrane potential?  A. Only a small change occurred, because the resting neuron is not very permeable to sodium.  B. The resting membrane potential disappeared.  C. The resting membrane potential became less negative. D. Only a small change occurred, because the sodium channels were mostly open. Feedback:Correct! Part 5 of 6 - 8.0/ 8.0 Points Answer the following question in your own words without using any resources. Your answer should be written in complete sentences using correct grammar, spelling, and terminology. Question 30 of 32 4.0/ 4.0 Points Briefly explain why it is more difficult to initiate an action potential during the relative refractory period. with K channels open, and Na channels closed, a stronger stimulus is needed to initiate an action potential Feedback:Learning Objective: Explain why it is more difficult to initiate an action potential during the relative refractory period. Please review Lab Exercise 3, Activity 5. Question 31 of 32 4.0/ 4.0 Points Briefly explain how the sodium-potassium pump helps to maintain the resting membrane potential. by moving K into the cell and Na out of the cell it keeps the cell negatively charged inside. Feedback:Learning Objective: Describe the cellular transport mechanisms responsible for establishing the resting membrane potential. Please review Lab Exercise 3, Activity 1. Part 6 of 6 - 5.0/ 5.0 Points Instructions: 1. Click on the Browse button to find the lab report on your computer. 2. Click on the Upload button to attach your lab report to the quiz. Question 32 of 32 5.0/ 5.0 Points Attach your completed Lab Exercise 3, Activity 5: The Action Potential: Measuring Its Absolute and Relative Refractory Periods lab report (PEX-03-05_FirstnameL) asthe answer to this question. PEX-03-05_Joshua Hall(244.67 KB) Comment:Thank you