A Drug That Decreased Calcium Levels in a Muscle Cell

question 103

Multiple Choice

A drug that decreased calcium levels in a muscle cell and thereby lowered the number of crossbridges formed during the heart's contractions would be a

• A) positive chronotropic agent.
• B) negative chronotropic agent.
• C) positive inotropic agent.
• D) negative inotropic agent.

---

Definitions:

Left Forearm

The lower part of the left arm extending from the elbow to the wrist.

Anastomosis

The surgical connection between two structures, typically blood vessels or other tubular organs.

Cerebral Arterial Circle

Also known as the Circle of Willis, it is a circulatory anastomosis that supplies blood to the brain and surrounding structures.

Oxygenated Blood

Blood rich in oxygen, typically flowing from the lungs to the heart and then to the rest of the body.