From What You Currently Know, in a Spacecraft at a Point

question 14

Multiple Choice

From what you currently know, in a spacecraft at a point of weightlessness, which effect is most likely?

• A) Rotational equilibrium would be lacking and you could not detect head movement.
• B) Gravitational equilibrium would be altered since the otoliths would not be pulled down by gravity.
• C) Without gravity, there would be no vertigo.
• D) All balance systems would work similar to being on Earth with normal gravity.
• E) There would be absolutely no sense of balance signals of either type without gravity.

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Definitions:

Receptors

Proteins located on the cell surface or within cells that bind specific molecules (ligands), triggering a biological response.

Cyclic Adenosine Monophosphate

A second messenger important in many biological processes, derived from ATP and used for intracellular signal transduction.

Glucocorticoid

A class of steroid hormones that play a role in regulating metabolism, immune response, and stress response, produced in the adrenal cortex.

Estrogen

A group of hormones that play a key role in the development and regulation of the female reproductive system and secondary sex characteristics.