SCI 335 Week 15 Quiz 4

 SCI 335  Week 15 Quiz 4 | Wilmington University 

Question 1

The fetal blood that passes through the ductus venosus is relatively  

·         low in oxygen but high in nutrients.  

·         high oxygen but low in nutrients.  

·         low in oxygen and nutrients.  

·         high in oxygen and nutrients.

 

Question 2

Labor is regulated by  

·         negative feedback control.   

·         positive feedback control.  

·         prolactin.  

·         estrogen.

 

Question 3

As a result of the foramen ovale, blood is allowed to bypass the  

·         kidneys.    

·         lungs.  

·         aorta.  

·         liver.

 

Question 4

The chorion is the _____ and the amnion is the _____ .  

·         site where an embryo is implanted into the uterus; outer protective membrane around the embryo  

·         None of these is correct.  

·         site from which primary germ layers develop; site from which secondary germ layers develop    

·         outermost covering of an embryo and helps form the placenta; membrane that encircles a developing embryo

 

Question 5

The yolk sac functions to  

·         provide nutrients to the fetus when the umbilical cord is disconnected.  

·         give rise to the primary germ layers.  

·         form blood cells in early development.  

·         store metabolic wastes until the fetus is born.

 

Question 6

The ductus arteriosus allows fetal blood to move from the  

·         pulmonary trunk into the aorta.  

·         aorta into the pulmonary trunk.  

·         left atrium into the right atrium.  

·         right atrium into the left atrium.

 

 Question 7

The prostaglandins that stimulate the sperm tail movements and contractions within the uterine tubes are secreted by  

·         the sperm.  

·         the uterus.  

·         the ovaries.  

·         the oocyte.

 

Question 8

The major body parts derived from mesoderm are the  

·         respiratory tract, urinary bladder, and urethra.  

·         nervous system and sense organs.  

·         epidermis, hair, nails, and glands of skin.    

·         muscle tissue, bone tissue, and bone marrow.

 

 

Question 9

The functions of the placenta are to allow 

·         All of these are correct. 

·         carbon dioxide and other wastes to diffuse from the maternal blood into the embryonic blood.  

·         the movement of anesthetics from the maternal blood into the fetus.  

·         oxygen and nutrients to diffuse from maternal blood through the placental membrane into the embryo.

 

Question 10

A major difference between fetal blood flow and adult blood flow is that in the fetus the  

·         internal iliac arteries are known as umbilical arteries.  

·         femoral vein contains blood low in oxygen.  

·         pulmonary artery delivers blood to the lungs.    

·         inferior vena cava contains blood high in oxygen.

 

Question 11

Genetics is the study of  

·         disease.  

·         protein combinations.  

·         expressed genes.    

·         inherited variation.

 

Question 12

Punnett squares and _________ are tools genetic counselors use to demonstrate inheritance in families.  

·         family trees  

·         microarrays    

·         pedigrees  

·         genome maps

 

Question 13

When the alleles of a gene pair are different they are said to be  

·         homozygous. 

·         heterozygous.

·         dominant.  

·         recessive.

 

Question 14

X-linked genes are always expressed more frequently in males than in females due to the fact that  

·         they have two X chromosomes.    

·         there is no allele on Y chromosomes.  

·         females have lower levels of testosterone.  

·         their hormone levels are higher.

 

Question 15

When the alleles of a gene pair are identical they are said to be  

·         recessive.    

·         homozygous.  

·         heterozygous.  

·         dominant.