Which statement best explains drugs like methylphenidate help a patient with attention-deficit hyperactivity disorder (ADHD)?
1. Neurotransmitters are blocked, limiting the effects they can produce within the PNS.
2. Activation of certain areas of the brain causes increased attention and ability to focus.
3. Neurotransmitter levels are reduced, which produces a calming effect within the CNS.
4. Certain areas of the brain are deactivated, resulting in a calming effect.
2
Rationale 1: Neurotransmitters such as epinephrine and serotonin are released, not blocked.
Rationale 2: At first, it might seem confusing to use a CNS stimulant to treat a hyperactivity disorder. However, CNS stimulants activate the reticular activating system, causing higher levels of attention and ability to focus.
Rationale 3: Neurotransmitters such as epinephrine and serotonin are released, not reduced.
Rationale 4: Areas of the brain are not deactivated.
Global Rationale: At first, it might seem confusing to use a CNS stimulant to treat a hyperactivity disorder. However, CNS stimulants activate the reticular activating system, causing higher levels of attention and ability to focus. Neurotransmitters such as epinephrine and serotonin are released, not blocked or reduced. Areas of the brain are not deactivated.
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The Snellen E chart is appropriate for initial measurement of visual acuity in a child of age ______ years
Fill in the blank(s) with correct word
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The healthcare professional working with older adults teaches general infection-prevention measures as a priority for this age group due to which change in lymphocyte function?are able to provide protection against certain microorganisms because of what?
a. Increased production of antibodies against self-antigens b. Decreased number of circulating T cells c. Decreased production of autoantibodies d. Increased production of helper T cells