Which of the Following Explains the Inability of the Nitrates

question 26

Multiple Choice

Which of the following explains the inability of the nitrates to act as coronary dilators during angina?

• A) Arteriolar dilation is greater than venodilation is at low-dose ranges.
• B) Nitrates do not act on vascular smooth muscle.
• C) The most common route of administration is sublingual.
• D) The arteries are already maximally dilated by ischemia.

Understand the role of GTP hydrolysis in deactivating signaling proteins.

Comprehend the function of adenylyl cyclase in converting ATP to cAMP.

Learn about the efficiency of signal relay by scaffold proteins.

Identify second messengers in signal transduction pathways.

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Definitions:

Leads

In medical context, wires or electrodes used in various diagnostic machines to detect and record electrical activity, such as in an electrocardiogram (EKG).

Precordial Electrode

Used in electrocardiography, positioned on the chest to record the electrical activity of the heart from different angles.

Intercostal Space

The anatomical space between two ribs, containing muscles, nerves, and blood vessels, significant in respiratory movement.

Sternum

The long, flat bone located in the center of the chest (breastbone) that connects to the ribs via cartilage, providing structural support to the thorax.