Final Biod 152 Study Guide Graded A+

Discuss in detail the layers of cells (of the blastocyst) which form the embryo. {Ans: Blastocyst begin to develop into three layers: ectoderm (the skin and nervous tissue develop), mesoderm (cardiovascular system, red blood cells, and muscle develop) , and endoderm (forms the glands(thyroid, parathyriod, thymus).}Name and describe what is occurring in the neuron cell membrane in section 4 of the diagram. Include the charge of the membrane during this phase. {Ans: This is phase 4: afterpolarization (hyperpolarization), the potassium gates are slow to clse and that results in an undershoot of the potential, the voltage will drop below -70mV and the return to the restign state beings.}This is a located response in the tissue, causing increased blood flow, redness, and pain. {Ans: The inflammatory response}Fill in the blank: In a reflex, the ____________ neuron conducts nerve impulses along a pathway towards the central nervous system. {Ans: sensory (afferent)}Which of the following is true about the trigeminal nerve? A. The mandibular branch receives sensory information from taste buds B. The ophthalmic branch controls eye movements C. The maxillary branch receives information from the upper lip D. The maxillary branch controls the muscles of mastication {Ans: