The Phasic Ia Stretch Reflex

question 10

Multiple Choice

The phasic Ia stretch reflex:

• A)Has a polysynaptic reflex arc.
• B)Acts to maintain a constant level of tension in the muscle.
• C)Is initiated by a receptor that lies in series with the extrafusal fibers.
• D)Has its sensitivity controlled by the gamma motor neuron system.

---

Definitions:

Artiodactyls

A group of hoofed mammals that typically have an even number of toes, including cattle, pigs, and deer.

Astragalus

A genus of plants in the legume family, some species of which are used in traditional medicine.

Morphology

Refers to the form and structure of organisms.

DNA Evidence

Biological evidence derived from DNA analysis, used in legal and forensic contexts to identify or exonerate suspects, as well as in biological research to understand genetic relationships and ancestries.