Question 1

Surgical delivery of a baby is called a cesarean delivery.

Accepted Answer

Cesarean delivery, also known as a C-section, is a surgical procedure in which a baby is delivered through an incision in the mother's abdomen and uterus.

Question 2

Prior to the union of the chromosomes of the egg and sperm, meiosis II is completed by the ovum.

Accepted Answer

Meiosis II is completed by the ovum only after fertilization, when the sperm enters the egg, leading to the union of the chromosomes.

Question 3

Many sperm entering the vagina are killed by the acidic secretions of the female reproductive tract.

Accepted Answer

The acidic secretions of the female reproductive tract serve as a barrier that reduces the number of sperm reaching the egg. Only a small number of sperm make it to the egg for fertilization.

Question 4

The cell formed by the union of egg and sperm during fertilization is the ________.

Accepted Answer

The answer of The cell formed by the union of...

Question 5

The chances of "aging well" can be increased through a healthy diet and regular exercise.

Accepted Answer

Studies have shown that maintaining a healthy diet and engaging in regular physical activity are two key factors in promoting healthy aging. A healthy diet, rich in whole foods and low in processed and refined products, provides necessary nutrients for optimal physical and cognitive function. Exercise can help maintain bone and muscle mass, prevent chronic diseases, and improve mental health and cognitive function. Both diet and exercise can also help control weight, reduce inflammation and oxidative stress, and boost immune function, which in turn can reduce the risk of age-related diseases such as diabetes, heart disease, and cancer.

Question 6

During the first four days of development following fertilization, cells of the embryo undergo rapid cleavage, but the size of the embryo remains the same.

Accepted Answer

During cleavage, the cells of the embryo divide rapidly without increasing in size, resulting in a blastocyst with the same overall size as the original zygote.

Question 7

Fertilization is completed when the sperm nucleus fuses with the ________.

Accepted Answer

The answer of Fertilization is completed when the sperm nucleus...

Question 8

As an adult human ages, the blood vessels lose their elasticity, and blood pressure drops as dilation occurs.

Accepted Answer

As adult humans age, blood vessels actually lose their elasticity and become stiffer, causing an increase in blood pressure. Blood pressure may also increase due to the build-up of plaques and narrowing of the arteries. Dilation of blood vessels can occur in response to certain medications or conditions, but it is not a typical age-related phenomenon.

Question 9

In the fetus, the ductus arteriosus shunts blood from the pulmonary artery directly to the lung.

Accepted Answer

In the fetus, the ductus arteriosus shunts blood from the pulmonary artery to the aorta, bypassing the lungs. After birth, the ductus arteriosus closes and blood flows to the lungs for oxygenation.

Question 10

Which one of the following is TRUE regarding an aging nervous system?
A) Neurons continue to reproduce to replace damaged neurons, but at a slower pace.
B) The brain increases slightly in size.
C) Lenses of the eyes stiffen, making it more difficult to focus.
D) Balance and motor skills are affected; the senses of smell and taste are not affected.
E) The number of connections between neurons of the brain decrease.

Accepted Answer

As a person ages, the lenses of their eyes become less flexible, resulting in presbyopia, which may require reading glasses. This change in the eye can cause difficulty in focusing on nearby objects.

Question 11

During embryonic development, the second cavity that forms in the blastocyst becomes filled with amniotic fluid.

Accepted Answer

The second cavity that forms in the blastocyst is the amniotic cavity, which becomes filled with amniotic fluid.

Question 12

The duration of a person's life is referred to as
A) aging
B) longevity
C) eon
D) gestation
E) puberty

Accepted Answer

Longevity refers to the length of a person's life.

Question 13

Pregnancy occurs when the morula stage implants in the uterus.

Accepted Answer

Pregnancy occurs when the blastocyst stage, not the morula stage, implants in the uterus. The morula develops into a blastocyst before implantation.

Question 14

For sperm to be able to penetrate the zona pellucida of the egg, enzymes are released from the ________.

Accepted Answer

The answer of For sperm to be able to penetrate...

Question 15

Insertion of a thin tube through the vagina into the uterus to sample fetal tissue is called ________.

Accepted Answer

The answer of Insertion of a thin tube through the...

Question 16

As the onset of labor approaches, estrogen is released by the placenta, and increases the number of oxytocin receptors.

Accepted Answer

Estrogen is released by the placenta and increases the number of oxytocin receptors, which helps to stimulate contractions as labor approaches.

Question 17

Following fertilization, if a ball of embryonic cells splits into two masses before differentiation has begun, ________ twins result.

Accepted Answer

The answer of Following fertilization, if a ball of embryonic...

Question 18

One hypothesis for why we age, or at least why our cells age, is that every time that mitosis occurs, ________ at the ends of chromosomes shorten, and eventually the cell runs out of these units at the ends of chromosomes.

Accepted Answer

The answer of One hypothesis for why we age, or...

Question 19

If you have ever had a chance to witness a child birth, then you know it is an amazing event. However, even after the baby has been removed from the mother, her work is not complete in terms of labor. Why?

Accepted Answer

The answer of If you have ever had a chance...

Question 20

If an embryo implants in an organ other than the uterus, the pregnancy is said to be ________.

Accepted Answer

The answer of If an embryo implants in an organ...

Quiz 21: Development and Aging