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1. Which of these correctly matches each structure to the germ layer from which it arises?
A. I = endoderm; II = ectoderm; III = mesodermB. I = endoderm; II = mesoderm; III = ectodermC. I = ectoderm; II = endoderm; III = mesodermD. I = mesoderm; II = endoderm; III = ectodermE. I = mesoderm; II = ectoderm; III = endoderm
2. Which precedes an action potential traveling down the axon of a neuron?
A. Neurotransmitters bind to receptors on the dendrite of the neuron.B. Neurotransmitters are released from the axon terminals of the neuron.C. The action potential travels through the synapse from a nearby neuron.D. Vesicles in the axon terminal release their contents at the synapse.E. The cell body releases neurotransmitters down the length of the axon.
3. A nerve leading to the small intestine causes the rate of digestion to increase. This nerve MOST LIKELY belongs to which of the following systems and divisions?
A. I and II onlyB. II and III onlyC. I, II, and IIID. I, III, and IVE. II, III, and IV
4. Which of these is the MOST LIKELY result of blood calcium levels falling too low?
A. The thyroid gland releases calcitonin, which binds to bone cells.B. The parathyroid glands release PTH, which binds to kidney cells.C. The thyroid gland releases thyroid hormone, which binds to small intestine cells.D. The pancreas releases glucagon, which binds to liver cells.E. The pituitary gland releases growth hormone, which binds to bone cells.
5. Which correctly describes a process or event in the female reproductive cycle?
A. The cycle is regulated via a negative feedback loop.B. The corpus luteum releases an egg into a fallopian tube.C. Estrogen and progesterone cause a follicle to mature.D. Pituitary hormones cause the uterine lining to be shed monthly.E. A maturing follicle causes the uterine lining to build up.
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