Captopril (A Drug Derived from the Venom of the Pit

question 127

Multiple Choice

Captopril (a drug derived from the venom of the pit viper) interferes with the production of angiotensin, which is a potent vasoconstrictor. It is used clinically to treat high blood pressure. Given its antiangiotensin activity, can you explain why captopril reduces blood pressure?

• A)It causes a decrease in the resistance to blood flow.
• B)It causes an increase in the resistance to blood flow.
• C)It increases blood volume.
• D)It blocks stimulation of the cardiovascular system by the parasympathetic nervous system.
• E)It blocks cardiac stimulation by the sympathetic nervous system.

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Definitions:

Ultradian

Referring to recurrent periods or cycles repeated throughout a 24-hour day, such as the stages of sleep.

Infradian

Referring to biological rhythms with cycles that are longer than 24 hours, such as menstrual cycles or seasonal behaviors.

Prefrontal Cortex

The anterior part of the frontal lobes of the brain, involved in complex cognitive behavior, decision making, and moderating social behaviour.

Brodmann's Areas

Regions of the cerebral cortex defined by their cytoarchitectonic characteristics and associated with different brain functions.