Question 1

Which letter in Figure 19.7 identifies a primary spermatocyte?

Accepted Answer

A) A 
B) B 
C) C 
D) D 
A) A 
B) B 
C) C 
D) D B

Question 2

During blood clotting, a broken blood vessel triggers a cascade of factors that collectively reduce blood loss. In this example, the clotting factors are functioning as part of

Accepted Answer

A) thermoregulation. 
B) a negative feedback loop. 
C) osmoregulation. 
D) a positive feedback loop. 
A) thermoregulation. 
B) a negative feedback loop. 
C) osmoregulation. 
D) a positive feedback loop. D

Question 3

Some species of fish that live in the cold waters of the Arctic Ocean have evolved an "antifreeze" protein. Why might this protein be important to homeostasis?

Accepted Answer

A) The protein might be involved in transporting water into fish cells during cold weather. The more water in the cell, the smaller the chance that ice crystals will form inside it. 
B) The protein might prevent ice crystals from forming inside fish cells, which would prevent damage to the plasma membrane when temperatures are low. 
C) The protein might be involved in removing solutes from fish cells during cold weather. With fewer solutes in the cell, essential chemical reactions are more likely to occur. 
D) The protein might allow this species of fish to survive global warming by enabling the fish to carry out chemical reactions that would normally be prevented by warm temperatures. 
A) The protein might be involved in transporting water into fish cells during cold weather. The more water in the cell, the smaller the chance that ice crystals will form inside it. 
B) The protein might prevent ice crystals from forming inside fish cells, which would prevent damage to the plasma membrane when temperatures are low. 
C) The protein might be involved in removing solutes from fish cells during cold weather. With fewer solutes in the cell, essential chemical reactions are more likely to occur. 
D) The protein might allow this species of fish to survive global warming by enabling the fish to carry out chemical reactions that would normally be prevented by warm temperatures. B

Question 4

Ramona is pregnant and she would like to find out the sex of the baby before her delivery date. Because this is her first baby, she doesn't know when she should have an ultrasound to determine the baby's sex. At what point in time during fetal development do a baby's sexual organs develop? How does this point differ from when the child is genetically designated to develop into a male or a female?

Accepted Answer

The sex of a human baby is determined at

Question 5

Which cell in Figure 19.7 is a diploid cell and contains duplicated chromosomes?

Accepted Answer

A) the secondary oocyte 
B) the egg 
C) the primary oocyte 
D) the first polar body 
A) the secondary oocyte 
B) the egg 
C) the primary oocyte 
D) the first polar body

Question 6

During an exam review session, your classmate claims that tissues and organs are the same thing because they both contain cells. You review your notes to compare and contrast these components of living systems. Use the space below to explain why your classmate's comment is incorrect.

Accepted Answer

Although tissues and organs both have ce

Question 7

During gestation, human development is divided into several stages called

Accepted Answer

A) semesters. 
B) trimesters. 
C) conceptions. 
D) gestations. 
A) semesters. 
B) trimesters. 
C) conceptions. 
D) gestations.

Question 8

When certain hormones are added to the uterus, they induce thickening in the cells lining its walls. Which of the following hormones is likely to be responsible for this change?

Accepted Answer

A) estrodiol 
B) testosterone 
C) progesterone 
D) follicle-stimulating hormone 
A) estrodiol 
B) testosterone 
C) progesterone 
D) follicle-stimulating hormone

Question 9

In the last few weeks of pregnancy, the level of estrogen in the woman's blood rises. This increase causes

Accepted Answer

A) the fetus to develop more rapidly. 
B) the amount of prostaglandins secreted by the placenta to decrease. 
C) the muscles of the uterus to become more sensitive to the hormone oxytocin. 
D) even more estrogen to be released from the pituitary gland. 
A) the fetus to develop more rapidly. 
B) the amount of prostaglandins secreted by the placenta to decrease. 
C) the muscles of the uterus to become more sensitive to the hormone oxytocin. 
D) even more estrogen to be released from the pituitary gland.

Question 10

Which of the following forms of contraception is chemical in nature?

Accepted Answer

A) a female condom 
B) birth control pills 
C) a contraceptive sponge 
D) sterilization 
A) a female condom 
B) birth control pills 
C) a contraceptive sponge 
D) sterilization

Question 11

A collection of one or more cell types that carry out distinct and coordinated activities in the body is called ________.

Accepted Answer

The answer of A collection of one or more cell...

Question 12

For homework, your instructor asks you to write a paragraph discussing how the mouth, stomach, and small intestines work together to process food items and provide nutrients to the body. Which level of biological organization are you studying?

Accepted Answer

A) tissues 
B) organ systems 
C) cells 
D) organs 
A) tissues 
B) organ systems 
C) cells 
D) organs

Question 13

Which of the following statements about hermaphrodites is true?

Accepted Answer

A) They can mate with every individual of the same species that they encounter. 
B) They can generally fertilize their own eggs. 
C) They have either testes or ovaries. 
D) Most animals reproduce using hermaphroditic reproduction. 
A) They can mate with every individual of the same species that they encounter. 
B) They can generally fertilize their own eggs. 
C) They have either testes or ovaries. 
D) Most animals reproduce using hermaphroditic reproduction.

Question 14

Explain how the hormone oxytocin plays a role in the progression of labor.

Accepted Answer

As estradiol levels spike late in pregna

Question 15

The contraceptive method that seals the female oviduct is

Accepted Answer

A) the intrauterine device. 
B) female sterilization. 
C) the diaphragm. 
D) the female condom. 
A) the intrauterine device. 
B) female sterilization. 
C) the diaphragm. 
D) the female condom.

Question 16

Which of the following forms of contraception is LEAST likely to prevent a woman from becoming pregnant?

Accepted Answer

A) an intrauterine device 
B) birth control pills 
C) a male condom 
D) a diaphragm 
A) an intrauterine device 
B) birth control pills 
C) a male condom 
D) a diaphragm

Question 17

Which of the following is a collection of organs?

Accepted Answer

A) bone, tendons, and fat 
B) reproductive, immune, and integumentary 
C) heart, lungs, and liver 
D) neurons, smooth muscle, and skin 
A) bone, tendons, and fat 
B) reproductive, immune, and integumentary 
C) heart, lungs, and liver 
D) neurons, smooth muscle, and skin

Question 18

Which of the following statements distinguishes gamete formation in human males from gamete formation in human females?

Accepted Answer

A) Human males have a shorter reproductive lifespan than human females. 
B) Human males make sperm throughout their lives, beginning at puberty, whereas human females are born with all the eggs that may be fertilized. 
C) Human males produce gametes in the gonads, whereas human females produce eggs in the gut. 
D) Human males make two polar bodies during spermatogenesis, whereas human females do not. 
A) Human males have a shorter reproductive lifespan than human females. 
B) Human males make sperm throughout their lives, beginning at puberty, whereas human females are born with all the eggs that may be fertilized. 
C) Human males produce gametes in the gonads, whereas human females produce eggs in the gut. 
D) Human males make two polar bodies during spermatogenesis, whereas human females do not.

Question 19

Significant weight gain and the growth of hair on the head are events that occur during which trimester of pregnancy?

Accepted Answer

A) the first trimester 
B) the second trimester 
C) the third trimester 
D) It varies, depending on when the mother eats the most. 
A) the first trimester 
B) the second trimester 
C) the third trimester 
D) It varies, depending on when the mother eats the most.

Question 20

How do living systems "know" the appropriate temperature or water content within that system?

Accepted Answer

A) Living systems depend on signals from the environment to regulate these conditions. 
B) Organisms have a genetically predetermined set point that must be internally maintained. 
C) Living systems monitor positive feedback mechanisms and shut off negative feedback loops to regulate these processes. 
D) Actually, most living systems do not regulate temperature or water content, so these features typically fluctuate greatly. 
A) Living systems depend on signals from the environment to regulate these conditions. 
B) Organisms have a genetically predetermined set point that must be internally maintained. 
C) Living systems monitor positive feedback mechanisms and shut off negative feedback loops to regulate these processes. 
D) Actually, most living systems do not regulate temperature or water content, so these features typically fluctuate greatly.

Exam 19: Homeostasis, Reproduction, and Development

Which letter in Figure 19.7 identifies a primary spermatocyte?

During blood clotting, a broken blood vessel triggers a cascade of factors that collectively reduce blood loss. In this example, the clotting factors are functioning as part of

Some species of fish that live in the cold waters of the Arctic Ocean have evolved an "antifreeze" protein. Why might this protein be important to homeostasis?

Which cell in Figure 19.7 is a diploid cell and contains duplicated chromosomes?

During an exam review session, your classmate claims that tissues and organs are the same thing because they both contain cells. You review your notes to compare and contrast these components of living systems. Use the space below to explain why your classmate's comment is incorrect.

During gestation, human development is divided into several stages called

When certain hormones are added to the uterus, they induce thickening in the cells lining its walls. Which of the following hormones is likely to be responsible for this change?

In the last few weeks of pregnancy, the level of estrogen in the woman's blood rises. This increase causes

Which of the following forms of contraception is chemical in nature?

A collection of one or more cell types that carry out distinct and coordinated activities in the body is called ________.

For homework, your instructor asks you to write a paragraph discussing how the mouth, stomach, and small intestines work together to process food items and provide nutrients to the body. Which level of biological organization are you studying?

Which of the following statements about hermaphrodites is true?

Explain how the hormone oxytocin plays a role in the progression of labor.

The contraceptive method that seals the female oviduct is

Which of the following forms of contraception is LEAST likely to prevent a woman from becoming pregnant?

Which of the following is a collection of organs?

Which of the following statements distinguishes gamete formation in human males from gamete formation in human females?

Significant weight gain and the growth of hair on the head are events that occur during which trimester of pregnancy?

How do living systems "know" the appropriate temperature or water content within that system?

The Nature of Science

Chemistry of Life

Life Is Cellular

How Cells Work

Cell Division

Patterns of Inheritance

Chromosomes and Human Genetics

What Genes Are

How Genes Work

Evidence for Evolution

Mechanisms of Evolution

Adaptation and Species

The History of Life

Human Evolution

General Principles of Ecology

Growth of Populations

Communities of Organisms

Ecosystems

Digestive, Muscular, and Skeletal Systems

Circulatory, Respiratory, Urinary, and Nervous Systems

Endocrine and Immune Systems

Plant Physiology

Applying the Science

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