Question 1

Which of these organ systems develops without any contribution from mesoderm?

Accepted Answer

A) integumentary system 
B) muscular system 
C) skeletal system 
D) cardiovascular system 
E) nervous system 
A) integumentary system 
B) muscular system 
C) skeletal system 
D) cardiovascular system 
E) nervous system

Question 2

Swallowed fluid,sloughed cells,mucus and bile produce a greenish anal discharge of the neonate called

Accepted Answer

A) amylase. 
B) feces. 
C) meconium. 
D) lactase. 
E) neonatalia. 
A) amylase. 
B) feces. 
C) meconium. 
D) lactase. 
E) neonatalia.

Question 3

The developing embryo is at maximum risk from environmental toxins and drugs during which time period?

Accepted Answer

A) Day 1 - day 5 
B) Day 14 - day 35 
C) Day 1 - day 25 
D) Day 41 - day 45 
E) Day 8 - day 14 
A) Day 1 - day 5 
B) Day 14 - day 35 
C) Day 1 - day 25 
D) Day 41 - day 45 
E) Day 8 - day 14

Question 4

The amniotic cavity forms inside the

Accepted Answer

A) blastocele 
B) morula 
C) zygote 
D) inner cell mass 
A) blastocele 
B) morula 
C) zygote 
D) inner cell mass

Question 5

The molecule responsible for heredity is

Accepted Answer

A) DNA. 
B) RNA. 
C) glycolipids. 
D) phospholipids. 
E) ATP. 
A) DNA. 
B) RNA. 
C) glycolipids. 
D) phospholipids. 
E) ATP.

Question 6

The failure of the foramen ovale to close results in

Accepted Answer

A) an atrial septum defect. 
B) a ventricular septum defect. 
C) a defective valve. 
D) patent ductus arteriosus. 
E) all of these effects. 
A) an atrial septum defect. 
B) a ventricular septum defect. 
C) a defective valve. 
D) patent ductus arteriosus. 
E) all of these effects.

Question 7

Failure of the neural tube to close during development can lead to

Accepted Answer

A) spina bifida. 
B) anencephaly. 
C) hydroencephaly. 
D) both spina bifida and anencephaly. 
E) All of these are correct. 
A) spina bifida. 
B) anencephaly. 
C) hydroencephaly. 
D) both spina bifida and anencephaly. 
E) All of these are correct.

Question 8

After parturition,

Accepted Answer

A) prolactin stimulates milk production. 
B) estrogens and progesterone levels increase. 
C) suckling stimulates the release of progesterone. 
D) colostrum is produced for the first two months. 
E) all of these events occur. 
A) prolactin stimulates milk production. 
B) estrogens and progesterone levels increase. 
C) suckling stimulates the release of progesterone. 
D) colostrum is produced for the first two months. 
E) all of these events occur.

Question 9

The correct order of the developmental stages of embryonic cells from the beginning is

Accepted Answer

A) blastocyst $\rightarrow$ zygote $\rightarrow$ morula. 
B) morula $\rightarrow$ zygote $\rightarrow$ blastocyst. 
C) blastocyst $\rightarrow$ morula $\rightarrow$ zygote. 
D) zygote $\rightarrow$ morula $\rightarrow$ blastocyst. 
E) zygote $\rightarrow$ blastocyst $\rightarrow$ morula. 
A) blastocyst $\rightarrow$ zygote $\rightarrow$ morula. 
B) morula $\rightarrow$ zygote $\rightarrow$ blastocyst. 
C) blastocyst $\rightarrow$ morula $\rightarrow$ zygote. 
D) zygote $\rightarrow$ morula $\rightarrow$ blastocyst. 
E) zygote $\rightarrow$ blastocyst $\rightarrow$ morula.

Question 10

As we age,there is an overall decrease in ATP production.What is this decline associated with?

Accepted Answer

A) Reduction in cross-links of collagen 
B) Mitochondrial DNA mutations 
C) Decline in muscle fiber size 
D) Ingestion of moderate amounts of vitamin C 
E) Ingestion of moderate amounts of vitamin E 
A) Reduction in cross-links of collagen 
B) Mitochondrial DNA mutations 
C) Decline in muscle fiber size 
D) Ingestion of moderate amounts of vitamin C 
E) Ingestion of moderate amounts of vitamin E

Question 11

Which of the following statements is false?

Accepted Answer

A) Fertilization normally occurs within the upper 1/3rd of the uterine tube. 
B) Sperm are unable to fertilize the egg until they have undergone capacitation. 
C) Enzymes released from the acrosome of the sperm digest a path through the zona pellucida to the secondary oocyte. 
D) The secondary oocyte is capable of being fertilized for several weeks after ovulation. 
E) Some sperm cells remain viable in the female reproductive tract for up to six days. 
A) Fertilization normally occurs within the upper 1/3rd of the uterine tube. 
B) Sperm are unable to fertilize the egg until they have undergone capacitation. 
C) Enzymes released from the acrosome of the sperm digest a path through the zona pellucida to the secondary oocyte. 
D) The secondary oocyte is capable of being fertilized for several weeks after ovulation. 
E) Some sperm cells remain viable in the female reproductive tract for up to six days.

Question 12

Fertilization,the union of the sperm cell and the oocyte,produces a

Accepted Answer

A) haploid oocyte. 
B) diploid oocyte. 
C) haploid zygote. 
D) diploid zygote. 
A) haploid oocyte. 
B) diploid oocyte. 
C) haploid zygote. 
D) diploid zygote.

Question 13

Milk "letdown" occurs in response to

Accepted Answer

A) prolactin. 
B) progesterone. 
C) oxytocin. 
D) estrogen. 
E) lactose. 
A) prolactin. 
B) progesterone. 
C) oxytocin. 
D) estrogen. 
E) lactose.

Question 14

The stage from onset of regular contractions until cervix dilates to 10 cm is

Accepted Answer

A) gestation. 
B) the first stage or dilation phase of labor. 
C) the second stage or expulsion phase of labor. 
D) the third stage or placental phase of labor. 
A) gestation. 
B) the first stage or dilation phase of labor. 
C) the second stage or expulsion phase of labor. 
D) the third stage or placental phase of labor.

Question 15

Since the gestation period is usually calculated as 280 days since the last menstrual period (LMP),the actual developmental gestation period would be closer to

Accepted Answer

A) 252 days. 
B) 266 days. 
C) 280 days. 
D) 294 days. 
E) 308 days. 
A) 252 days. 
B) 266 days. 
C) 280 days. 
D) 294 days. 
E) 308 days.

Question 16

During early cell division,the number of cells in the zygote __________ while the size of each cell _________.

Accepted Answer

A) increases; increases 
B) increases; decreases 
C) decreases; decreases 
D) decreases; increases 
E) remains the same; increases 
A) increases; increases 
B) increases; decreases 
C) decreases; decreases 
D) decreases; increases 
E) remains the same; increases

Question 17

The aging immune system

Accepted Answer

A) increases its ability to respond to outside antigens. 
B) may have decreased autoimmune reactions. 
C) may have T lymphocytes with greatly increased activity. 
D) loses its ability to quickly recognize cancerous changes in cells. 
E) shows all of these changes. 
A) increases its ability to respond to outside antigens. 
B) may have decreased autoimmune reactions. 
C) may have T lymphocytes with greatly increased activity. 
D) loses its ability to quickly recognize cancerous changes in cells. 
E) shows all of these changes.

Question 18

Implantation of the blastocyst in the uterine wall begins about _____ days after fertilization.

Accepted Answer

A) 2 
B) 7 
C) 14 
D) 21 
E) 28 
A) 2 
B) 7 
C) 14 
D) 21 
E) 28

Question 19

From birth to 1 month after birth the developing individual is known as the

Accepted Answer

A) blastocyst or pre-embryo. 
B) neonate. 
C) embryo. 
D) infant. 
E) fetus. 
A) blastocyst or pre-embryo. 
B) neonate. 
C) embryo. 
D) infant. 
E) fetus.

Question 20

Before birth the ductus venosus carries blood from the _______ to the ______ thereby bypassing the _________.

Accepted Answer

A) right atrium; lungs; aorta 
B) umbilical vein; sinusoids of the liver; superior vena cava 
C) umbilical vein; inferior vena cava; sinusoids of the liver 
D) umbilical arteries; umbilical vein; heart 
E) right atrium; left atrium; right ventricle 
A) right atrium; lungs; aorta 
B) umbilical vein; sinusoids of the liver; superior vena cava 
C) umbilical vein; inferior vena cava; sinusoids of the liver 
D) umbilical arteries; umbilical vein; heart 
E) right atrium; left atrium; right ventricle

Which of these organ systems develops without any contribution from mesoderm?

Swallowed fluid,sloughed cells,mucus and bile produce a greenish anal discharge of the neonate called

The developing embryo is at maximum risk from environmental toxins and drugs during which time period?

The amniotic cavity forms inside the

The molecule responsible for heredity is

The failure of the foramen ovale to close results in

Failure of the neural tube to close during development can lead to

After parturition,

The correct order of the developmental stages of embryonic cells from the beginning is

As we age,there is an overall decrease in ATP production.What is this decline associated with?

Which of the following statements is false?

Fertilization,the union of the sperm cell and the oocyte,produces a

Milk "letdown" occurs in response to

The stage from onset of regular contractions until cervix dilates to 10 cm is

Since the gestation period is usually calculated as 280 days since the last menstrual period (LMP),the actual developmental gestation period would be closer to

During early cell division,the number of cells in the zygote __ while the size of each cell _.

The aging immune system

Implantation of the blastocyst in the uterine wall begins about _____ days after fertilization.

From birth to 1 month after birth the developing individual is known as the

Before birth the ductus venosus carries blood from the _ to the thereby bypassing the _____.

The Human Organism

The Chemical Basis of Life

Cell Structures and Their Functions

Tissues

Integumentary System

Skeletal System: Bones and Joints

Muscular System

Nervous System

Senses

Endocrine System

Blood

Heart

Blood Vessels and Circulation

The Lymphatic System and Immunity

Respiratory System

Digestive System

Nutrition, metabolism, and Body Temperature Regulation

Urinary System and Fluid Balance

Reproductive System

Filters

Exam 20: Development, heredity, and Aging

Which of these organ systems develops without any contribution from mesoderm?

Swallowed fluid,sloughed cells,mucus and bile produce a greenish anal discharge of the neonate called

The developing embryo is at maximum risk from environmental toxins and drugs during which time period?

The amniotic cavity forms inside the

The molecule responsible for heredity is

The failure of the foramen ovale to close results in

Failure of the neural tube to close during development can lead to

After parturition,

The correct order of the developmental stages of embryonic cells from the beginning is

As we age,there is an overall decrease in ATP production.What is this decline associated with?

Which of the following statements is false?

Fertilization,the union of the sperm cell and the oocyte,produces a

Milk "letdown" occurs in response to

The stage from onset of regular contractions until cervix dilates to 10 cm is

Since the gestation period is usually calculated as 280 days since the last menstrual period (LMP),the actual developmental gestation period would be closer to

During early cell division,the number of cells in the zygote __________ while the size of each cell _________.

The aging immune system

Implantation of the blastocyst in the uterine wall begins about _____ days after fertilization.

From birth to 1 month after birth the developing individual is known as the

Before birth the ductus venosus carries blood from the _______ to the ______ thereby bypassing the _________.

The Human Organism

The Chemical Basis of Life

Cell Structures and Their Functions

Tissues

Integumentary System

Skeletal System: Bones and Joints

Muscular System

Nervous System

Senses

Endocrine System

Blood

Heart

Blood Vessels and Circulation

The Lymphatic System and Immunity

Respiratory System

Digestive System

Nutrition, metabolism, and Body Temperature Regulation

Urinary System and Fluid Balance

Reproductive System

Filters

During early cell division,the number of cells in the zygote __ while the size of each cell _.

Before birth the ductus venosus carries blood from the _ to the thereby bypassing the _____.