Anencephaly, a fatal condition, results from the failure of the anterior end of the neural tube to close properly, causing failure of the forebrain to develop. Determine and discuss the germ layer involved in this defect
What will be an ideal response?
Failure of the forebrain to develop results in a fatal condition known as anencephaly. Cells of the ectoderm thicken and form the neural plate, which folds inward and deepens. The edges fuse to form a neural tube, which will pinch off from the ectodermal germ layer. The anterior end of the neural tube will become the brain, and the remainder will become the spinal cord. By the end of the fourth week, the anterior end of the neural tube should develop into three enlarged areas called the primary brain vesicles: the forebrain, midbrain, and hindbrain.
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The sympathetic and parasympathetic divisions of the ANS have the same effect on most body organ systems
Indicate whether the statement is true or false
Most reflexes are regulated by
A) negative feedback. B) the brain. C) positive feedback. D) the spinal cord. E) ganglia.
Which system is responsible for the most common route of water loss from the body?
A) urinary system B) digestive system C) integumentary system D) respiratory system
A 17-year-old male was shot in the right anterior chest during an altercation with a gang member. As your partner is applying 100% oxygen, you perform a rapid secondary assessment and find an open chest wound with a small amount of blood bubbling from it. You should:
A. place a sterile dressing over the wound and apply direct pressure. B. control the bleeding from the wound and prepare to transport at once. C. apply an occlusive dressing to the wound and continue your assessment. D. direct your partner to assist the patient's ventilations with a bag-mask device.