When the Suprachiasmatic Nucleus in a Horse Is Destroyed

question 50

Multiple Choice

When the suprachiasmatic nucleus in a horse is destroyed,

• A) circadian rhythm becomes free-running.
• B) a zeitgeber is induced.
• C) the animal loses its ability to navigate.
• D) most circadian activity ceases.

---

Definitions:

Tonsillitis

Inflammation of the tonsils—lymphoid tissue located in the pharynx.

Pharyngitis

Inflammation of the pharynx, commonly known as throat inflammation, which can cause sore throat and difficulty swallowing.

Pleura

A double-layered membrane surrounding each lung, providing lubrication and facilitating breathing movement.

Alveoli

Tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide takes place.