After One Frog's Heart Has Been Stimulated, an Extract of Fluid

question 96

Multiple Choice

 After one frog's heart has been stimulated, an extract of fluid from that heart can make a second frog's heart beat faster. What conclusion did Otto Loewi draw from these results?

• A) Transmission at synapses is a chemical event.
• B) The sympathetic and parasympathetic nervous systems are antagonistic.
• C) Transmission at heart muscle synapses is electrical.
• D) Hormones facilitate the actions of the nervous system.

---

Definitions:

Glass-Ceiling Effect

a barrier to advancement that is not officially acknowledged, limiting the progression of minorities and women in professional environments.

Career Advancement

The progression through a career path, which might involve upward movement, increasing responsibility, and higher compensation.

Invisible Barrier

A term often used to describe unseen obstacles preventing certain groups from advancing within an organization or system, such as the "glass ceiling" for women and minorities.

Prejudice

Preconceived opinion not based on reason or actual experience, often leading to biased treatment of individuals or groups.