When Sarcomeres Contract, They Generate Force (Tension)

question 28

Multiple Choice

When sarcomeres contract, they generate force (tension) . However, the amount of force generated depends on the sarcomere length and the amount of thick and thin filament overlap. Below is a figure that details the force-generating properties of a single sarcomere. This figure was modified from a scientific paper by Al Gordon and colleagues from 1966 and is a classic illustration of the relationship between sarcomere length and force.
-At what point on the graph are thick and thin filaments most overlapped?

• A) point A
• B) point B
• C) point D
• D) point E

---

Definitions:

Atrial Natriuretic Hormone

A hormone, secreted by heart's atria, that regulates blood pressure by reducing sodium ion concentration in the blood, thus decreasing blood volume.

Vasopressin

A hormone produced by the pituitary gland that helps regulate water balance in the body and constriction of blood vessels.

Angiotensin II

A peptide hormone that causes blood vessels to constrict, increasing blood pressure.

Parasympathetic Stimulation

Refers to the activation of the parasympathetic nervous system, which helps control bodily functions when at rest, such as stimulating digestion or reducing heart rate.