Q: The expulsion stage begins when the fetal head enters what?   Read this paragraph and choose the correct option from the provided answers:  Expulsion Stage The expulsion stage begins when the fetal head enters the birth canal and ends with birth of the newborn. It typically takes up to 2 hours, but it can last longer or be completed in minutes, depending in part on the orientation of the fetus. The vertex presentation known as the occiput anterior vertex is the most common presentation and is associated with the greatest ease of vaginal birth. The fetus faces the maternal spinal cord and the smallest part of the head (the posterior aspect called the occiput) exits the birth canal first. In fewer than 5 percent of births, the infant is oriented in the breech presentation, or buttocks down. In a complete breech, both legs are crossed and oriented downward. In a frank breech presentation, the legs are oriented upward. Before the 1960s, it was common for breech presentations to be delivered vaginally. Today, most breech births are accomplished by Caesarian section. Vaginal birth is associated with significant stretching of the vaginal canal, the cervix, and the perineum. Until recent decades, it was routine procedure for an obstetrician to numb the perineum and perform an episiotomy, an incision in the posterior vaginal wall and perineum. The perineum is now more commonly allowed to tear on its own during birth. Both an episiotomy and a perineal tear need to be sutured shortly after birth to ensure optimal healing. Although suturing the jagged edges of a perineal tear may be more difficult than suturing an episiotomy, tears heal more quickly, are less painful, and are associated with less damage to the muscles around the vagina and rectum. Upon birth of the newborn’s head, an obstetrician will aspirate mucus from the mouth and nose before the newborn’s first breath. Once the head is birthed, the rest of the body usually follows quickly. The umbilical cord is then double-clamped, and a cut is made between the clamps. This completes the second stage of childbirth.   Choices:  - head is outside vagina  - you can see the umbilical cord  - uterus  - birth canal   A:
birth canal
(Question)
Q: What type of sti is characterized by blisters?   Read this paragraph and choose the correct option from the provided answers:  Genital herpes is a common STI caused by a herpes virus. The virus causes painful blisters on the penis or near the vaginal opening. The blisters generally go away on their own, but they may return repeatedly throughout life. There is no cure for genital herpes, but medicines can help prevent or shorten outbreaks.   Choices:  - syphilis  - gonorrhea  - chlamydia  - genital herpes   A:
(Answer)
genital herpes
Ques: Q: What is a winding ridge of sand deposited by a stream of meltwater called?   Read this paragraph and choose the correct option from the provided answers:  An esker is a winding ridge of sand deposited by a stream of meltwater. Such streams flow underneath a retreating glacier.   Choices:  - sand dune  - desert  - oasis  - esker   A:
Ans: esker
(Q).
Q: What is the term for the force exerted by circulating blood on the walls of blood vessels?   Read this paragraph and choose the correct option from the provided answers:  The force exerted by circulating blood on the walls of blood vessels is called blood pressure . Blood pressure is highest in arteries and lowest in veins. When you have your blood pressure checked, it is the blood pressure in arteries that is measured. High blood pressure, or hypertension , is a serious health risk but can often be controlled with lifestyle changes or medication. You can learn more about hypertension by watching the animation at this link: http://www. healthcentral. com/high-blood-pressure/introduction-47-115. html .   Choices:  - circulation pressure  - heart pressure  - blood energy  - blood pressure   A:
(A).
blood pressure
Ques:Q: What is the study of the vital statistics of populations and how they change over time?   Read this paragraph and choose the correct option from the provided answers:     Choices:  - sociology  - ethnography  - anthropology  - demography   A:

Ans:demography
Ques:Q: Metabolic cooperation between different prokaryotic species often occurs in surface-coating colonies. what are these colonies called?   Read this paragraph and choose the correct option from the provided answers:     Choices:  - eukaryotes  - lichens  - plankton  - biofilms   A:

Ans:
biofilms