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Human Physiology 15Th Edition By Fox - Test Bank
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Human Physiology, 15e (Fox) Chapter 1 The Study of Body Function 1) Physiology ________. A) emphasizes cause-and-effect mechanisms B) includes the fields of chemistry and psychology C) ignores the scientific method D) ultimately strives to understand the structures of individual cells ...

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  • August 9, 2023
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Human Physiology, 15e (Fox)
Chapter 20 Reproduction

1) The human female determines the sex of her offspring.

2) How many autosomal chromosomes are present in human cells?
A) 23 pairs
B) 46
C) 22 pairs
D) 2 pairs

3) What type of genetic change occurs when an allele is silenced by methylation of cytosine
bases?
A) Genomic
B) Epigenetic
C) Mutation
D) None of the choices are correct.

4) What type of genes are found on the Y chromosome?
A) X-transposed genes
B) Degenerate genes
C) Testis-specific genes
D) All of the choices are correct.

5) Genomic imprinting allows for differing expressions of an allele.

6) Epigenetic changes cannot be passed on to a zygote.

7) A fertilized egg is called a(n) ________.
A) autosome
B) zygote
C) ovum
D) Barr body

8) Which structure would be found in normal somatic cells of women but not men?
A) An X chromosome
B) A Y chromosome
C) A Barr body
D) 22 pairs of autosomal chromosomes

9) Cryptorchid males do not produce testosterone.

10) Deletion of the SRY gene would cause male fetuses to develop as females.

11) Leydig cells in the male produce Müllerian inhibition factor.


1
Copyright 2019 © McGraw-Hill Education. All rights reserved. No reproduction or distribution without the prior
written consent of McGraw-Hill Education.

,12) What is the principle sex steroid in males?
A) Estrogen
B) Testosterone
C) Progesterone
D) Aldosterone

13) How many chromosomes are found in a normal human cell?
A) 23
B) 23 pairs
C) 46
D) Both 23 pairs and 46 are correct.

14) Female accessory sex organs develop from the mesonephric ducts.

15) Treating a male fetus with antibodies to DHT would prevent development of the epididymis.

16) Female accessory sex organs develop because of the increase in estrogen from the ovaries
during puberty.

17) A lack of testosterone in males will cause the genital tubercle to form a(n) ________.
A) penis
B) testis
C) clitoris
D) ovary

18) The first event to occur during development of the reproductive system would be the
________.
A) descent of the testes into the scrotum
B) formation of the vagina
C) onset of testosterone production
D) development of the Müllerian ducts

19) Testosterone, not DHT, stimulates embryonic development of ________.
A) seminal vesicles
B) ductus deferens
C) ejaculatory duct
D) All of the choices are correct.

20) Males lacking testosterone receptors would ________.
A) develop as genotypic females
B) have testes and female external genitalia
C) lack gonads
D) have male internal genitalia




2
Copyright 2019 © McGraw-Hill Education. All rights reserved. No reproduction or distribution without the prior
written consent of McGraw-Hill Education.

, 21) The embryonic urethral fold becomes the female ________.
A) labia minora
B) labia majora
C) glans clitoris
D) All of the choices are correct.

22) Those with testicular feminization syndrome have ________.
A) an extra X chromosome
B) a missing X chromosome
C) an extra chromosome 23
D) no chromosomal number abnormalities

23) A male with 5 alpha-reductase deficiency will have male internal sex organs, but more
female appearing external genitals.

24) During the first trimester of pregnancy, the ovaries are active endocrine glands.

25) Gonadotropic hormones from the anterior pituitary will affect the gonads in all of the
following ways EXCEPT ________.
A) stimulation of spermatogenesis or oogenesis
B) stimulation of gonadal hormone secretion
C) suppression of sexual drive
D) maintenance of gonad structures

26) The rate at which GnRH is secreted from the hypothalamus determines whether LH or FSH
is secreted from the anterior pituitary.

27) Hormones secreted by the gonads have a negative feedback effect on gonadotropins of the
anterior pituitary.

28) The secretion of GnRH, FSH, and LH are pulsatile instead of continuous.

29) In general, the onset of puberty occurs sooner in boys compared to girls.

30) The first sign of puberty in females is ________.
A) breast development
B) menarche
C) rapid longitudinal growth of the skeleton
D) axillary hair growth

31) What event(s) occur to start puberty?
A) GABA release in hypothalamus is reduced.
B) Glutamate stimulation of the hypothalamus is increased.
C) Secretion of GnRH to the anterior pituitary increases.
D) All of the choices are correct.


3
Copyright 2019 © McGraw-Hill Education. All rights reserved. No reproduction or distribution without the prior
written consent of McGraw-Hill Education.

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