Nursing Concepts Test: Answer Key

Test answers 1. Pacinian corpus- Which of the following is not a cell type found in the retina? cle 2. Adrenal medulla A patient has symptoms of high blood pressure, elevated heart rate, due to excess epinephrine via tumor. Where would this tumor be located? 3. Pain What is the stimulus for nociceptors? 4. Right frontal lobe A brain tumor patient has a problem with moving her left arm. Where might you expect this brain tumor to be located? 5. Oligodendrocyte What type of cells form a myelin sheath around axons in the CNS? 6. Chloride The opening of ________ channels decreases the likelihood of an action potentials? 7. ampulla cupula Located within the ________ of the semicircular canal, a gelatinous structure called the _________ surrounds the cell 8. -70 Typical resting membrane potential for a neuron is ________ mV 9. -55 Threshold for action potential in a neuron is _____ mV 10. True Coding for stimulus intensity is signaled by AP frequency 11. False Mechanoreceptor fields are largest at the most sensitive areas such as the lips and hands 12. True Lipophilic hormone may be temporarily stored in adipose tissue 13. False Synaptic delay is due to the time it takes for neurotransmitters to diffuse across the synaptic cleft 14. False 1/3 Voltage-gated channels are most abundant at the dendrites of a postsynaptic cell 15. False Taste receptor cells are only located on the tongue 16. True The posterior pituitary is comprised of axon terminals from the hypothalamus 17. Commissures What is the term for the bundles of axons that connect the left and right side of the brain? 18. Astrocytes What type of glial cell is necessary for normal development of the blood-brain barrier? 19. Ventricles Chambers in the brain that contain CSF 20. Refractory The ____________ period is reduced membrane excitability after an action potential 21. Bilirubin Metabolite of hemoglobin that imparts the yellowish tinge found in plasma and the skin if a person has jaundice 22. Acetylcholine Neurotransmitter released from motor neurons 23. Vascular spasm What is the first step of hemostasis 24. Arterioles Resistance to blood flow is regulated by which blood vessels? 25. ADH What hormone does not contribute to smooth muscle vasodilation in arterioles? 26. Macrophages Foreign materials are filtered out of the lymphatic system by 27. Coronary arteries Blood supply to the heart comes from 28. fibrin What molecule forms the meshwork in a blood clot 29. bone marrow Hematopoietic stem cells are found in: 2/3 30. vasodilation Nitric oxide causes _____________ 31. high Veins function as volume reservoirs due to their ________ compliance 32. blood pressure Which of the following factors do not contribute to vascular resistance? 33. von Willebrand factor Formation of a platelet plug is initiated by _____ 34. Megakaryocytes What type of cell is the precursor for platelets? 35. True The lymphatic system is an open circulatory system 36. False The end plate potential does not always depolarize the muscle cell to the threshold value required to initiate an action potential 37. False TOF: The opening and closure of the atrioventricular and semilunar valves is driven by the contraction of papillary muscles 38. False TOF: CO2 causes the relaxation of metarteriole sphincters 39. True TOF: Release of ADP by platelets is part of a positive feedback loop to increase platelet stickiness and aggregation 40. False TOF: A decrease in blood pressure within an arteriole will initiate a myogenic vasoconstriction response to maintain a constant rate of blood flow 41. ganglion A ________ is a cluster of cell bodies in the peripheral nervous system 42. Medullary osmot- Urea is responsible for regulation: ic gradient 3/3