The Ejection of Milk That Occurs While the Infant Is

question 67

Multiple Choice

The ejection of milk that occurs while the infant is suckling is mediated by

• A)myogenic contraction of myoepithelial cells.
• B)prolactin- induced myoepithelial cell contraction.
• C)acetylcholine- induced myoepithelial cell contraction.
• D)local reflex- induced myoepithelial cell contraction.
• E)oxytocin- induced myoepithelial cell contraction.

---

Definitions:

Crossing Over

The process during meiosis where two chromosomes pair up and exchange segments of their genetic material to produce new combinations of genes.

Homologous Chromosomes

Pairs of chromosomes that contain the same types of genes but can have different alleles.

Sister Chromatids

They are identical copies of a single chromosome that are connected by a centromere. Sister chromatids are formed during DNA replication and are important for the process of cell division.

Chromosomal DNA

The DNA that constitutes the chromosomes within the nucleus of eukaryotic cells, encoding most of the genetic information of the organism.