The purpose of the ovum's zona pellucida is to:
a. make a pathway for more than one sperm to reach the ovum.
b. allow the 46 chromosomes from each gamete to merge.
c. prevent multiple sperm from fertilizing the ovum.
d. stimulate the ovum to begin mitotic cell division.
C
Fertilization causes the zona pellucida to change its chemical composition so multiple sperm cannot fertilize the ovum.
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During an assessment of a 32-year-old patient with a recent head injury, the nurse notices that the patient responds to pain by extending, adducting, and internally rotating his arms. His palms pronate, and his lower extremities extend with
plantar flexion. Which statement concerning these findings is most accurate? This patient's response: a. Indicates a lesion of the cerebral cortex. b. Indicates a completely nonfunctional brainstem. c. Is normal and will go away in 24 to 48 hours. d. Is a very ominous sign and may indicate brainstem injury.
What are characteristics of vitamins? (Select all that apply.)
a. Are necessary in large doses b. Have the ability to be manufactured by the body c. Regulate metabolic functions in the cells d. Exist in multiple forms and are called vi-tamers e. Are classified as macronutrients
A patient's 2:1 parenteral nutrition container infuses before the pharmacy prepares the next container. This places the patient at risk for which complication?
1) Sepsis 2) Pneumothorax 3) Hypoglycemia 4) Thrombophlebitis
Which of the following services are available to patients needing subacute care?
A. Board-certified physiatrists and nurses experienced in rehabilitation B. Interdisciplinary team of specialists, including physical and occupational therapists C. Laboratory and pharmaceutical services D. All of these