COBGC Anatomy and Physiology 1 — Questions and Answers

Question 1: What is the primary function of the placenta during pregnancy?

To produce hormones
To nourish the fetus and remove waste (Correct answer)
To protect the fetus from physical trauma
To facilitate fertilization of the egg

Correct answer: To nourish the fetus and remove waste

The placenta is a vital temporary organ that develops during pregnancy, serving as the interface between the mother and the fetus. Its primary function is to facilitate the exchange of nutrients and oxygen from the mother's bloodstream to the fetus, while simultaneously removing waste products from the fetal blood for the mother's body to excrete. This critical role ensures the healthy growth and development of the fetus.

Question 2: Which hormone triggers the onset of labor?

Estrogen
Progesterone
Oxytocin (Correct answer)
HCG (Human Chorionic Gonadotropin)

Correct answer: Oxytocin

Oxytocin is the hormone primarily responsible for triggering and strengthening uterine contractions, which are essential for the onset and progression of labor. Produced in the hypothalamus and released by the posterior pituitary gland, it plays a crucial role in childbirth. It also has functions in milk ejection during breastfeeding.

Question 3: What is the role of the corpus luteum in the menstrual cycle?

To secrete estrogen and progesterone
To facilitate egg release
To maintain the endometrium if pregnancy occurs (Correct answer)
To transport sperm to the egg

Correct answer: To maintain the endometrium if pregnancy occurs

The corpus luteum forms from the ruptured follicle after ovulation and plays a critical role in the menstrual cycle and early pregnancy. Its main function is to secrete progesterone (and some estrogen), which is essential for maintaining the uterine lining (endometrium) in a state suitable for implantation and to support the early stages of pregnancy if fertilization occurs. If pregnancy does not occur, it degenerates, leading to menstruation.

Question 4: Which part of the female reproductive system is also known as the birth canal?

Vagina (Correct answer)
Uterus
Ovaries
Fallopian Tubes

Correct answer: Vagina

The vagina is a muscular, elastic canal that extends from the cervix to the outside of the body. It is commonly known as the birth canal because it serves as the passageway through which a baby travels during a vaginal delivery. It also plays a role in menstruation and sexual intercourse.

Question 5: Which structure is known as the "cervical canal" and connects the uterus to the vagina?

Endometrium
Cervix (Correct answer)
Ovaries
Fallopian Tubes

Correct answer: Cervix

The cervix is the lower, narrow part of the uterus that connects it to the vagina. This connection forms a canal, often referred to as the cervical canal, which allows for the passage of menstrual blood, sperm, and, during childbirth, the baby. It acts as a gateway to the uterus.

COBGC Anatomy and Physiology 1

What is the primary function of the placenta during pregnancy?