c51 development SB

Question 1

The time during which a developing embryo and fetus grows in the mother’s uterus is called a

Answer 1

pregnancy

Question 2

In most mammals, the organ that provides nourishment and oxygen to the fetus and helps dispose of its metabolic wastes is the

Answer 2

placenta

Question 3

The binding of oxytocin to its receptors initiates strong uterine muscle contractions that highlight _______

Answer 3

labor

Question 4

Embryonic development is BEST described as the process by which a(n) ______ is transformed into an organism with distinct physiological systems and body parts

Answer 4

zygote

Question 5

In the early stages of vertebrate development, the process of cleavage yields successive cells that ______

Answer 5

become smaller and smaller
- no growth between cell divisions

Question 6

Pregnancy, or ______ is the time during which a developing embryo and fetus grows in the mother’s uterus

Answer 6

gestation

Question 7

Cells produced during the cleavage of a zygote are called

Answer 7

blastomeres

Question 8

The organ that connects the embryo to the blood vessels of the mother’s endometrium is the

Answer 8

placenta

Question 9

The _______ is the embryonic stage which consists of an outer layer of epithelial cells and an internal water-filled cavity.

Answer 9

blastula

Question 10

Very strong, rhythmic uterine contractions indicate that
_____ has begun.

Answer 10

labor

Question 11

Formed through a process called compaction, a globular solid mass of blastomeres formed by cleavage in a fertilized human egg is a(n)

Answer 11

morula

Question 12

The process by which a fertilized egg is transformed into an organism with distinct physiological systems and body parts is called _____ development.

Answer 12

embryonic

Question 13

Following cleavage in humans, the hollow ball of cells that make up the blastocyst develops into a highly organized structure called the _____

Answer 13

gastrula

Question 14

Which of the following statements best describes the process of cleavage in animal development?

Answer 14

the number of embryonic cells increases, but the overall size of the embryo stays the same

Question 15

Which of the following statements best describes the process of cleavage in animal development?

Answer 15

the number of embryonic cells increases, but the overall size of the embryo stays the same

Question 16

______ is the stage of the embryo in which the three germ layers are clearly established.

Answer 16

gastrulation

Question 17

The two half-size daughter cells produced by each cell division during cleavage are known as ______.

Answer 17

blastomeres

Question 18

The two half-size daughter cells produced by each cell division during cleavage are known as ______.

Answer 18

blastomeres

Question 19

Which of the following processes occur during neurulation?

Answer 19

formation of the CNS

Question 20

After cleavage, an animal embryo that consists of a hollow ball of cells with a central blastocoel cavity is called a

Answer 20

blastula

Question 21

A specialized structure that consists of arrangements of two or more tissue types is referred to as a(n)

Answer 21

organ

Question 22

A specialized structure that consists of arrangements of two or more tissue types is referred to as a(n)

Answer 22

organ

Question 23

In mammals, cleavage-stage embryos undergo a process called compaction, in which the amount of physical contact between cells is maximized. At this stage, the embryo is not hollow and is called a ______.

Answer 23

morula

Question 24

During embryonic development, the blastula or blastocyst develops into a highly organized structure called a(n)
______ as a result of major cell movements.

Answer 24

gastrula

Question 25

The three germ layers of the human embryo are established during the ______ phase of development.

Answer 25

gastrulation or gastrula

Question 26

The multistep embryonic process responsible for initiating CNS formation is

Answer 26

neurulation