Question 1

Uterine contractions that are irregular and brief that occur toward the end of gestation are called ________.

Accepted Answer

The answer of Uterine contractions that are irregular and brief...

Question 2

Under the influence of the trophoblast,maternal blood vessels in the endometrium

Accepted Answer

A) disappear. 
B) attach to the inner cell mass. 
C) break down and form lacunae. 
D) form a capillary network in the trophoblast. 
E) increase in size and penetrate the blastocyst. 
A) disappear. 
B) attach to the inner cell mass. 
C) break down and form lacunae. 
D) form a capillary network in the trophoblast. 
E) increase in size and penetrate the blastocyst.

Question 3

The process by which a viable embryo is formed is called ________.

Accepted Answer

The answer of The process by which a viable embryo...

Question 4

During gestation,contraction of the myometrium is inhibited by ________,produced by the corpus luteum.

Accepted Answer

A) progesterone 
B) estrogen 
C) oxytocin 
D) prostaglandins 
E) inhibin 
A) progesterone 
B) estrogen 
C) oxytocin 
D) prostaglandins 
E) inhibin

Question 5

Progesterone calms the myometrium and prevents contraction.What factors antagonize progesterone and trigger labor and delivery?

Accepted Answer

A) rising estrogen levels increase sensitivity 
B) rising oxytocin levels lead to uterine contractions 
C) distortion of the myometrium 
D) distortion of the cervix 
E) All of the answers are correct. 
A) rising estrogen levels increase sensitivity 
B) rising oxytocin levels lead to uterine contractions 
C) distortion of the myometrium 
D) distortion of the cervix 
E) All of the answers are correct.

Question 6

The process of cell division that divides the cytoplasm of the zygote among blastomeres is called

Accepted Answer

A) cleavage. 
B) implantation. 
C) placentation. 
D) embryogenesis. 
E) blastulation. 
A) cleavage. 
B) implantation. 
C) placentation. 
D) embryogenesis. 
E) blastulation.

Question 7

Which of the following is one of the critical events of the first trimester?

Accepted Answer

A) cleavage 
B) implantation 
C) placentation 
D) embryogenesis 
E) All of the answers are correct. 
A) cleavage 
B) implantation 
C) placentation 
D) embryogenesis 
E) All of the answers are correct.

Question 8

The formation of different types of cells required in development,or ________,occurs through selective changes in genetic activity.

Accepted Answer

The answer of The formation of different types of cells...

Question 9

The period of gestation that is characterized by rapid fetal growth and fat deposition is the ________ trimester.

Accepted Answer

A) first 
B) second 
C) third 
D) fourth 
E) fifth 
A) first 
B) second 
C) third 
D) fourth 
E) fifth

Question 10

The period of gestation when organs and organ systems complete most of their development and the fetus looks distinctly human is the ________ trimester.

Accepted Answer

A) first 
B) second 
C) third 
D) fourth 
E) fifth 
A) first 
B) second 
C) third 
D) fourth 
E) fifth

Question 11

The blood vessels that carry deoxygenated blood to the placenta are the ________.

Accepted Answer

The answer of The blood vessels that carry deoxygenated blood...

Question 12

Polyspermia is prevented by the ________ reaction.

Accepted Answer

The answer of Polyspermia is prevented by the ________ reaction....

Question 13

Which of the following is not part of oocyte activation?

Accepted Answer

A) softening of the zona pellucida 
B) influx of sodium ion 
C) membrane depolarization 
D) release of calcium ion from smooth ER 
E) discharge of exocytotic vesicles 
A) softening of the zona pellucida 
B) influx of sodium ion 
C) membrane depolarization 
D) release of calcium ion from smooth ER 
E) discharge of exocytotic vesicles

Question 14

The ________ stage is the stage of labor during which the placenta is expelled from the uterus.

Accepted Answer

The answer of The ________ stage is the stage of...

Question 15

The extraembryonic membrane that forms the fetal portion of the placenta is the

Accepted Answer

A) yolk sac. 
B) amnion. 
C) allantois. 
D) chorion. 
E) decidua. 
A) yolk sac. 
B) amnion. 
C) allantois. 
D) chorion. 
E) decidua.

Question 16

As a person ages

Accepted Answer

A) the skin becomes more elastic. 
B) lung tissue becomes more elastic. 
C) peristalsis and muscle tone decrease. 
D) hormone levels decrease. 
E) peristalsis and muscle tone decrease and hormone levels decrease. 
A) the skin becomes more elastic. 
B) lung tissue becomes more elastic. 
C) peristalsis and muscle tone decrease. 
D) hormone levels decrease. 
E) peristalsis and muscle tone decrease and hormone levels decrease.

Question 17

Figure 29-1 Early Human Development
Use Figure 29-1 to answer the following question:
-What is the developmental fate of "9"?

Accepted Answer

A) forms the embryo 
B) forms the trophoblast 
C) forms the chorion 
D) forms the placenta 
E) forms the decidua parietalis 
A) forms the embryo 
B) forms the trophoblast 
C) forms the chorion 
D) forms the placenta 
E) forms the decidua parietalis

Question 18

The placenta is a source of which of these hormones?

Accepted Answer

A) hCG 
B) relaxin 
C) placental lactogen 
D) progesterone 
E) All of the answers are correct. 
A) hCG 
B) relaxin 
C) placental lactogen 
D) progesterone 
E) All of the answers are correct.

Question 19

The extraembryonic membrane that forms a fluid-filled sac is the

Accepted Answer

A) yolk sac. 
B) amnion. 
C) allantois. 
D) chorion. 
E) decidua. 
A) yolk sac. 
B) amnion. 
C) allantois. 
D) chorion. 
E) decidua.

Question 20

During implantation,the

Accepted Answer

A) syncytial trophoblast erodes a path through the endometrium. 
B) inner cell mass begins to form the placenta. 
C) maternal blood vessels in the endometrium are walled off from the blastocyst. 
D) entire trophoblast becomes syncytial. 
E) inner cell mass is temporarily deprived of nutrients. 
A) syncytial trophoblast erodes a path through the endometrium. 
B) inner cell mass begins to form the placenta. 
C) maternal blood vessels in the endometrium are walled off from the blastocyst. 
D) entire trophoblast becomes syncytial. 
E) inner cell mass is temporarily deprived of nutrients.

Exam 29: Development and Inheritance

Uterine contractions that are irregular and brief that occur toward the end of gestation are called ________.

Under the influence of the trophoblast,maternal blood vessels in the endometrium

The process by which a viable embryo is formed is called ________.

During gestation,contraction of the myometrium is inhibited by ________,produced by the corpus luteum.

Progesterone calms the myometrium and prevents contraction.What factors antagonize progesterone and trigger labor and delivery?

The process of cell division that divides the cytoplasm of the zygote among blastomeres is called

Which of the following is one of the critical events of the first trimester?

The formation of different types of cells required in development,or ________,occurs through selective changes in genetic activity.

The period of gestation that is characterized by rapid fetal growth and fat deposition is the ________ trimester.

The period of gestation when organs and organ systems complete most of their development and the fetus looks distinctly human is the ________ trimester.

The blood vessels that carry deoxygenated blood to the placenta are the ________.

Polyspermia is prevented by the ________ reaction.

Which of the following is not part of oocyte activation?

The ________ stage is the stage of labor during which the placenta is expelled from the uterus.

The extraembryonic membrane that forms the fetal portion of the placenta is the

As a person ages

Figure 29-1 Early Human Development Use Figure 29-1 to answer the following question: -What is the developmental fate of "9"?

The placenta is a source of which of these hormones?

The extraembryonic membrane that forms a fluid-filled sac is the

During implantation,the

An Introduction to Anatomy and Physiology

The Chemical Level of Organization

The Cellular Level of Organization

The Tissue Level of Organization

The Integumentary System

Osseous Tissue and Bone Structure

The Axial Skeleton

The Appendicular Skeleton

Articulations

Muscle Tissue

The Muscular System

Neural Tissue

The Spinal Cord, spinal Nerves, and Spinal Reflexes

The Brain and Cranial Nerves

Neural Integration I: Sensory Pathways and the Somatic Nervous System

Neural Integration Ii: the Autonomic Nervous System and

The Special Senses

The Endocrine System

Blood

The Heart

Blood Vessels and Circulation

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Metabolism and Energetics

The Urinary System

Fluid, electrolyte, and Acid-Base Balance

The Reproductive System

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