Chapter 8 Practice Questions

How long is the epididymus and why does it take two weeks for sperm cells to move through it? 23 feet, and because sperm cells are so small Sperm cells don't move through the epididymous 50 feet, and because sperm cells are so small 1 foot, and it doesn't; it's instantaneous

23 feet, and because sperm cells are so small

If a sample of blood is deoxygenated, where is it likely to be found in the circulatory system of the human body? At the beginning of the systemic circuit. At the beginning of the pulmonary circuit. At the end of the pulmonary circuit. It's impossible to say with only this information.

At the beginning of the pulmonary circuit.

Which of the following is smallest in size? Trachea Bronchus Esophagus Bronchioles

Bronchioles

Which of the following is a function of the liver? Converting ammonia into urea. Filtering urea out of the blood. Storing urea until it can be eliminated from the body. Converting urea into ammonia.

Converting ammonia into urea.

The glomeruli and renal tubules play an important part in which of the following bodily functions? Filtering blood Dialysis Urine storage Urine excretion

Filtering blood

Which of the following is NOT filtered out of the glomerular capillaries? Small molecules Urea Water Large molecules

Large molecules

Nerves in this division of the PNS send messages to your muscles and glands to carry out the orders issued by the brain. Alimentary division Afferent division Endocrine division Sensory division Motor division

Motor division

This major division of the nervous system reports any sensory changes to the brain and spinal cord, and then carries out orders. Peripheral nervous system Central nervous system Somatic nervous system Sympathetic nervous system Parasympathetic nervous system

Peripheral nervous system

Choose the BEST answer. Sperm production takes place inside which of the following? Scrotum Testicles Ductus Deferens Seminiferous Tubules Epididymus

Seminiferous Tubules

Which statement best describes what is occurring during sexual arousal? The penile root and body of the becomes engorged Testosterone triggers the enlargement of the penis The urethra is filled with blood, lengthening the penile body The erectile tissues are filled with semen, enlarging the body of the penile shaft The erectile tissues are filled with blood, lengthening and widening the penile shaft

The erectile tissues are filled with blood, lengthening and widening the penile shaft

Dialysis closely mimics the function of which organ? The liver The bladder The lungs The kidney

The kidney

Julie is newly pregnant and visits her OB/GYN. Her doctor explains an essential layer of connection between mother and fetus. This attachment is a mixture of extraembryonic and maternal tissue that makes possible the transport of nutrients, oxygen, antibodies, and other materials to the fetus. It also allows for the removal of waste. What is Julie's doctor explaining? The placenta The amniotic sac The chorionic villi The chorion

The placenta

What is the purpose of the systemic circuit of the human body? To remove carbon dioxide from the blood. To oxygenate the blood. To carry blood to the lungs so carbon dioxide and oxygen can be exchanged. To supply blood rich in oxygen and nutrients to the body. To pick up oxygen needed by the blood.

To supply blood rich in oxygen and nutrients to the body.

The two main branches of the trachea that lead to the lobes of the lung are known as _____. bronchi bronchioles larynx trachea

bronchi

The uterus is made up of three layers. One of the jobs of the uterus is to provide contractions during labor to help push the baby out of the uterus. Which of the layers carries out this function? myometrium ectometrium endometrium medimetrium perimetrium

myometrium

Which of the following structures houses the developing fetus? ovary uterine tube cervix uterus zygote

uterus

This is a subdivision of the motor division of the PNS that allows the body to perform tasks that are not under conscious control. Spinal cord Autonomic nervous system Brain Somatic nervous system Afferent division

Autonomic nervous system

Which of the following explains how the kidney concentrates urea in the renal tubules? By selectively filtering urea out of the blood. By actively transporting it into the renal tubules. By binding it to uriglobin. By reabsorbing water from the renal tubules.

By reabsorbing water from the renal tubules.

This major division of the nervous system consists of your brain and spinal cord. Peripheral nervous system Somatic nervous system Central nervous system Autonomic nervous system Efferent nervous system

Central nervous system

From the beginning of a pregnancy, the environment inside the mother's uterus changes to create the perfect surrounding of protection, development and nourishment of the growing fetus. The layers and tissues that surround the fetus are collectively known as the: Allantois Extraembryonic membranes Chorion Placenta

Extraembryonic membranes

The layer called the chorion not only provides the connection between mother and fetus but also performs another function during the first trimester of a pregnancy. What is that function? It provides a safe space for the embryo to move around. It helps the fetus maintain a normal temperature and supports proper lung development. It provides an attachment from the embryo to the amnion. It secretes a hormone essential in helping the uterus maintain pregnancy during the first trimester.

It secretes a hormone essential in helping the uterus maintain pregnancy during the first trimester.

Which of the following statements concerning sperm is NOT true? Sperm taken from the epididymus do not yet know how to swim properly Sperm gain their ability to swim after being exposed to seminal fluid Sperm must pass through the epididymus to gain the ability to fertilize an egg All of these statements are correct Sperm taken directly from the testes can fertilize an egg

Sperm taken directly from the testes can fertilize an egg

If you are being chased by a bear, your heart rate will speed up. This is a function of which of the following? Parasympathetic nervous system Central nervous system Afferent division Sensory division Sympathetic nervous system

Sympathetic nervous system

How would you describe the purpose and function of the amnion and amniotic fluid? They are only present during the beginning of fetal development because these cells form the precursor to the umbilical cord blood vessels. Once the umbilical blood vessels are fully formed they are no longer needed. The amnion is like a balloon surrounding the fetus that is filled with amniotic fluid. Together they protect the fetus, maintain body temperature, support lung development, and provide space for it to move around. In a fertilized egg, the amnion helps to nourish the developing embryo or fetus, delivering these nutrients via amniotic fluid. The amnion and amniotic fluid form the endoderm layer that become the digestive system, liver, pancreas, and lungs.

The amnion is like a balloon surrounding the fetus that is filled with amniotic fluid. Together they protect the fetus, maintain body temperature, support lung development, and provide space for it to move around.

The circulation of blood from the right side of the human heart to the lungs and back to the heart completes which circuit? The circulatory circuit The systemic circuit The cardiovascular circuit The pulmonary circuit

The pulmonary circuit

Which part of the following human body is NOT considered a part of the circulatory system? The thyroid Blood vessels The heart Blood

The thyroid

Which of the following explains why humans are unable to absorb enough oxygen through their skin? There is not enough surface area. There are no alveoli in the skin. The skin is too thick. The bronchioles are too thin in the skin.

There is not enough surface area.

Which of the following is NOT a feature of alveoli? Their inner surface is coated with a thin film of water. They are tube shaped. They are surrounded by capillaries. They have thin walls.

They are tube shaped.

What is the job of the human body's pulmonary circuit? To supply your body with nutrients needed for cellular activity. To carry blood to the lungs so carbon dioxide can be released and oxygen can be picked up. To carry oxygen to the trillions of cells in your body. To pump the blood through your blood vessels. To return deoxygenated blood to the heart.

To carry blood to the lungs so carbon dioxide can be released and oxygen can be picked up.

Which of the following is the best description of the function of the ovary? To house a fertilized egg, allowing it to grow and mature To release an immature egg that will mature within the uterine tubes, on its way to the uterus To recruit and mature a single egg each month To release a mature zygote that travels to the uterus To recruit and mature a subset of eggs each month

To recruit and mature a single egg each month

In the lungs, after oxygen leaves the air, where does it travel next? To the film of water that coats the alveoli To the capillaries To the bloodstream To the wall of the alveoli

To the film of water that coats the alveoli

The allantois becomes which structure or structures that allow the transport of essential nutrients and other materials to and from the fetus? Amnion and amniotic fluid Chorion and chorionic villi Umbilical arteries and veins Digestive and respiratory tracts

Umbilical arteries and veins

Which structure is most likely to prevent sperm from entering the uterus? cervix vaginal canal labia minora labia majora

cervix

Female erectile tissue, while smaller than a males, does exist. Which structure contains female erectile tissue? vulva labia majora vaginal canal cervix clitoris

clitoris

Semen is made up from fluids from which of the following structures? bladder, seminal vesicles and prostate prostate, bulbourethral glands and seminal vesicles seminal vesicles, epididymus, prostate bulbourethral glands, prostate and epididymus testicles, prostate and epididymus

prostate, bulbourethral glands and seminal vesicles