During contraction of a muscle fiber, actin filaments slide outward and lengthen the fiber
Indicate whether the statement is true or false
False
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The nurse explains that the medically supervised approach to weight reduction will include: (Select all that apply.)
a. medications to suppress the appetite. b. an exercise program. c. participation in a support group. d. stress reduction. e. change in concepts about food.
A nurse is reviewing the lab reports of a 24-hours postpartum patient. The admission hematocrit was 41%, and the current hematocrit is 30%. What should be the initial nursing action in response to this report?
1. Notify the lab for another blood draw to verify accuracy of the report. 2. Increase intravenous infusion rate. 3. Report the lab values to the physician or midwife. 4. Administer 2 units of typed and cross-matched blood.
Cassandra, a 52-year-old woman with bipolar disorder, tells the nurse, "I read that there are chemicals in my brain that can cause my symptoms."
Knowing that she is referring to neurotransmitters, which of the following would be the best response by the nurse? A) "Recent studies have found that neurotransmitters do not play a role in bipolar disorders." B) "Clients with bipolar disorder often have high levels of GABA in manic states." C) "Levels of dopamine and serotonin have a significant effect on mania and depression." D) "Low levels of the neurotransmitter acetylcholine are associated with mania."
The duration of the PR interval on an electrocardiogram (ECG) reflects the time required for:
A. conduction from the atrioventricular (AV) node to the sinoatrial (SA) node. B. conduction from the sinoatrial (SA) to the atrioventricular (AV) node. C. depolarization and conduction through the ventricles. D. depolarization and repolarization of the ventricles.