The nerve responsible for innervation of the diaphragm is the ___. Pudendal nerv

Question

The nerve responsible for innervation of the diaphragm is the ___. Pudendal nerve Vagus nerve S1-S2 parasympathetic nerves Phrenic nerve Diaphragmatic nerve Which of the following chemicals are "detected" by chemoreceptors in the aortic & carotid bodies? CO_2 O_2 protons All of the above Only b & c The function of surfactant is ___. to reduce the surface tension within each alveolus plagocytois of inhaled dust and other small particles to prevent the alveoli from collapsing all of the above both a & c Which of the following cells produce Intrinsic Factor (essential for absorption of Vitamin B_12)? Parietal cells Enteroendocrine cells Chief cells Mucous neck cells More than one of the above Which of the following pathologies is very clinically serious and potentially lethal (meaning that you had better NOT ignore it but treat it aggressively or you'll DIE!)? Ruptured Appendix Gastroesophageal Reflux (Heartburn) Prolonged Violent Diarrhea Pancreatic Cancer Hemorrhoids Severe Gingivitis 1, 2, 4 1, 3, 4, 6 2, 4, 6 1, 3, 4, 5, 6 1, 2, 3, 4, 5, 6 Which of the following processes occurs or begins in your oral cavity (mouth)? Mastication Deglutition Digestion All of the above Only b & c

Explanation / Answer

71. Option D is correct. The phrenic nerve receives innervation from parts of both the cervical plexus and the brachial plexus of nerves. The phrenic nerves contain motor, sensory, and sympathetic nerve fibers. These nerves provide motor supply to the diaphragm.

72. Option D is correct. Peripheral chemoreceptors consists of aortic and carotid bodies. Aortic body detects changes in blood oxygen and carbon dioxide, but not pH (protons), while carotid body detects all three.

73. Option E is correct. The main function of surfactant is to lower the surface tension at the air/liquid interface within the alveoli of the lung and helps make the small air sacs in the lungs (alveoli) more stable and hence prevent the alveoli from collapsing.

74. Option E is correct. Intrinsic factor is a glycoprotein secreted by parietal (humans) or chief (rodents) cells of the gastric mucosa. it has an important role in the absorption of vitamin B12 (cobalamin) in the intestine.

75. Option B is correct.

76. Option D is correct.

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