Question 1

The heartbeat can be first detected during the period from _____ weeks of pregnancy.

Accepted Answer

A) 1 to 2 
B) 2 to 4 
C) 4 to 5 
D) 9 to 12 
E) none of the choices is correct 
A) 1 to 2 
B) 2 to 4 
C) 4 to 5 
D) 9 to 12 
E) none of the choices is correct

Question 2

A sperm has a tough job if it wants to fertilize an oocyte. It must survive acidic conditions in the vagina, undergo capacitation, select the correct uterine tube, penetrate the corona radiata and zona pellucida, and reach the membrane of oocyte before any other sperm does.

Accepted Answer

A) True 
 B)False

Question 3

True labor can be divided into four sequential stages: 1)puerperium stage, 2)stage of dilation, 3)stage of expulsion, and 4)placental stage.

Accepted Answer

A) True 
 B)False

Question 4

Carriers are homozygous recessive individuals with recessive genes that are not expressed but can be passed on to their offspring.

Accepted Answer

A) True 
 B)False

Question 5

The fetal period refers to the time of development extending from the end of the ___ month after fertilization until birth.

Accepted Answer

A) 1st 
B) 2nd 
C) 3rd 
D) 4th 
E) 5th 
A) 1st 
B) 2nd 
C) 3rd 
D) 4th 
E) 5th

Question 6

Birth typically occurs ___ weeks after fertilization.

Accepted Answer

A) 30 
B) 32 
C) 34 
D) 36 
E) 38 
A) 30 
B) 32 
C) 34 
D) 36 
E) 38

Question 7

Of the sperm cells introduced into the vagina during sexual intercourse, what percentage actually reach the secondary oocyte?

Accepted Answer

A) 50 percent 
B) 10 percent 
C) 5 percent 
D) 2 percent 
E) less than 1 percent 
A) 50 percent 
B) 10 percent 
C) 5 percent 
D) 2 percent 
E) less than 1 percent

Question 8

Fraternal twins

Accepted Answer

A) develop from a single fertilized ovum. 
B) are the same age but genetically different. 
C) develop from the same zygote. 
D) are always the same sex. 
E) are fertilized by one sperm cell. 
A) develop from a single fertilized ovum. 
B) are the same age but genetically different. 
C) develop from the same zygote. 
D) are always the same sex. 
E) are fertilized by one sperm cell.

Question 9

All of the following contribute to the weight gain experienced by pregnant females EXCEPT

Accepted Answer

A) growth of the fetus. 
B) growth of the placenta. 
C) marked enlargement of the breasts for lactation. 
D) increased amount of amniotic fluid. 
E) thickening of the muscular walls of the ovaries. 
A) growth of the fetus. 
B) growth of the placenta. 
C) marked enlargement of the breasts for lactation. 
D) increased amount of amniotic fluid. 
E) thickening of the muscular walls of the ovaries.

Question 10

Pharmaceutical companies use human placentas

Accepted Answer

A) as a source of hormones. 
B) as a source of drugs. 
C) as a source of blood cells. 
D) for burn coverage. 
E) All of the choices are correct. 
A) as a source of hormones. 
B) as a source of drugs. 
C) as a source of blood cells. 
D) for burn coverage. 
E) All of the choices are correct.

Question 11

The process of implantation of the blastocyst into the endometrium begins to occur approximately ___ days after fertilization.

Accepted Answer

A) 6 
B) 8 
C) 10 
D) 12 
E) 14 
A) 6 
B) 8 
C) 10 
D) 12 
E) 14

Question 12

After the morula enters the uterine cavity, its cells reorganize to form a _____, which contains a fluid-filled cavity.

Accepted Answer

A) zygote 
B) chorion 
C) blastocyst 
D) fetus 
E) bilaminar embryonic disc 
A) zygote 
B) chorion 
C) blastocyst 
D) fetus 
E) bilaminar embryonic disc

Question 13

The developmental process that occurs at about 3 weeks of development in which the bilaminar embryonic disc transforms into the trilaminar embryonic disc containing the three primary germ layers is called

Accepted Answer

A) implantation 
B) blastulation 
C) gastrulation 
D) neurulation 
E) placentation 
A) implantation 
B) blastulation 
C) gastrulation 
D) neurulation 
E) placentation

Question 14

Which of the labeled structures in the diagram carries oxygenated blood from the placenta to the fetus?

Accepted Answer

A) A 
B) B 
C) C 
D) G 
E) H 
A) A 
B) B 
C) C 
D) G 
E) H

Question 15

The zona pellucida is a clear layer of glycoprotein surrounding the ovulated oocyte.

Accepted Answer

A) True 
 B)False

Question 16

Which layer of the blastocyst secretes enzymes that are used by the embryo to penetrate the uterine lining during implantation?

Accepted Answer

A) syncytiotrophoblast layer 
B) cytotrophoblast layer 
C) endoderm layer 
D) mesoderm layer 
E) ectoderm layer 
A) syncytiotrophoblast layer 
B) cytotrophoblast layer 
C) endoderm layer 
D) mesoderm layer 
E) ectoderm layer

Question 17

The most common site of fertilization of an ovum by a sperm is in the uterine cavity.

Accepted Answer

A) True 
 B)False

Question 18

Uterine contractions during labor are stimulated by a positive feedback loop involving a pituitary hormone called

Accepted Answer

A) vasopressin 
B) oxytocin 
C) prolactin 
D) relaxin 
E) estrogen 
A) vasopressin 
B) oxytocin 
C) prolactin 
D) relaxin 
E) estrogen

Question 19

The only fetal blood vessel that carries fully oxygenated blood is the

Accepted Answer

A) umbilical vein 
B) umbilical artery 
C) aorta 
D) pulmonary trunk 
E) common iliac arteries 
A) umbilical vein 
B) umbilical artery 
C) aorta 
D) pulmonary trunk 
E) common iliac arteries

Question 20

A chart that uses the possible paternal and maternal allele combinations to determine the probability of expression of each genotype in offspring is called a

Accepted Answer

A) phenotype 
B) allele table 
C) Punnett square 
D) genetic code 
E) incomplete dominance 
A) phenotype 
B) allele table 
C) Punnett square 
D) genetic code 
E) incomplete dominance

Exam 24: Development and Inheritance

The heartbeat can be first detected during the period from _____ weeks of pregnancy.

A sperm has a tough job if it wants to fertilize an oocyte. It must survive acidic conditions in the vagina, undergo capacitation, select the correct uterine tube, penetrate the corona radiata and zona pellucida, and reach the membrane of oocyte before any other sperm does.

True labor can be divided into four sequential stages: 1)puerperium stage, 2)stage of dilation, 3)stage of expulsion, and 4)placental stage.

Carriers are homozygous recessive individuals with recessive genes that are not expressed but can be passed on to their offspring.

The fetal period refers to the time of development extending from the end of the ___ month after fertilization until birth.

Birth typically occurs ___ weeks after fertilization.

Of the sperm cells introduced into the vagina during sexual intercourse, what percentage actually reach the secondary oocyte?

Fraternal twins

All of the following contribute to the weight gain experienced by pregnant females EXCEPT

Pharmaceutical companies use human placentas

The process of implantation of the blastocyst into the endometrium begins to occur approximately ___ days after fertilization.

After the morula enters the uterine cavity, its cells reorganize to form a _____, which contains a fluid-filled cavity.

The developmental process that occurs at about 3 weeks of development in which the bilaminar embryonic disc transforms into the trilaminar embryonic disc containing the three primary germ layers is called

Which of the labeled structures in the diagram carries oxygenated blood from the placenta to the fetus?

The zona pellucida is a clear layer of glycoprotein surrounding the ovulated oocyte.

Which layer of the blastocyst secretes enzymes that are used by the embryo to penetrate the uterine lining during implantation?

The most common site of fertilization of an ovum by a sperm is in the uterine cavity.

Uterine contractions during labor are stimulated by a positive feedback loop involving a pituitary hormone called

The only fetal blood vessel that carries fully oxygenated blood is the

A chart that uses the possible paternal and maternal allele combinations to determine the probability of expression of each genotype in offspring is called a

Organization of the Human Body

Introductory Chemistry

Cells

Tissues

The Integumentary System

The Skeletal System

Joints

The Muscular System

Nervous Tissue

Central Nervous System, Spinal Nerves, and Cranial Nerves

Autonomic Nervous System

Somatic Senses and Special Sense

The Endocrine System

The Cardiovascular System: Blood

The Cardiovascular System: Heart

The Cardiovascular System: Blood Vessels and Circulation

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Nutrition and Metabolism

The Urinary System

Fluid, Electrolyte, and Acid-Base Balance

The Reproductive Systems

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