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e. Esophagus 46. Which of the following is a function of the excretory (urinary) system? a. Elimination of nitrogenous wastes ( ammonia, urea, uric acid)

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e. Esophagus 46. Which of the following is a function of the excretory (urinary) system? a. Elimination of nitrogenous wastes ( ammonia, urea, uric acid) b. Maintenance of salt balance c. in maintaining acid-base balance d. Elimination of undigested food e. Maintenance of water balance 47. Use key below 48. Use above key 49. Which of the following describes the route of urine out of the body after it leaves the kidney? a. Renal vein…………….…urinary bladder…………………urethra……………..ureter b. Renal vein……………… ureter……………………………….urinary bladder……………urethra c. Urethra…………………..urinary bladder………………….ureter d. Ureter…………………… urinary bladder……………………urethra e. Urethra…………………..urinary bladder…………………..ureters 52. (see image below) 53. (see image below) e. Reaction potential 57. (see image below) 58.  The arrow points to the region of the brain responsible for _________ a.  breathing and digesting b.  coordinating muscle movement and balance c.  thinking, remembering, sensing, and control of skeletal muscles d.  functioning of kidneys and heart 61. The chemical signals released at the end of a pre-synaptic neuron that moves across the synaptic cleft and are received by the post-synaptic neuron are called________ a. Hormones b. Neurotransmitters c. Pheromones d. Histamines e. Cytokines 62. Where are the receptors located for a protein type hormone such as insulin? a. Inside of every cell in the body b. Inside of the hormone’s target cells c. Within the plasma membrane of every cell in the body d. Within the plasma membrane of the hormone’s target cells 63. Which of the following does not pair a hormone with what it regulates in the human body? a. Insulin……………… decreases in blood glucose level b. Glucagon…………increases in blood glucose level c. ADH (antidiuretic hormone)…….. water conservation in kidney d. Oxytocin……………uterine contractions during delivery of a baby e. Parathyroid hormone………. Controls vitamin D levels 67 .  Choose the statement about the model of population growth that is illustrated to the left. a.  it fits an S shaped curve b.  it takes into account available resources c.  it is describing a population with limiting factors d.  growth slows down as the population size approaches its carrying capacity e.  it represents human population growth over time 70.  What is true about this population? a.  The population will increase at a rapid pace. b.  The pre-reproductive population is larger than the elderly population. c.  This pattern is typical of a developed country d.  There is a close balance in the population in terms of males and females e.  This population will require many more resources in the future. 72. Which of these is a in terms of its effect on populations? a. Hurricane b. Competition and parasitism c. Earthquake d. Volcano e. Windstorm 73. Population density is the number of __________ in a given area. a. Adults of a single species b. Females of a single species c. Prereproductive individuals of a single species d. Individuals of a single species 74. In a food chain “plant to caterpillar to lizard to snake”, which of these is the herbivore? a. Plant b. Caterpillar c. Lizard d. Snake e. None of these 75. The term for a species that is found only in a particular place or region and nowhere else ( ie kangaroo in Australia) is called a(n)__________species a. Threatened b. Endangered c. Endemic d. Keystone e. Invasive

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