UNIT FOUR TEST CH26
Terms in this set (97)
What is the maturation process in which spermatids elongate and shed excess cytoplasm?
Spermiogenesis
Mitosis results in ______, whereas meiosis results in ______.
two diploid cells; four haploid cells
Sperm are produced in the __________ and mature in the __________.
seminiferous tubules; epididymis
The three regions of the male urethra are __________.
prostatic urethra, membranous urethra, and spongy urethra
Stimulation of interstitial cells to secrete testosterone occurs by __________.
luteinizing hormone (LH)
Shortly after birth, the __________ may be removed from the penis during a procedure called circumcision.
prepuce
Testosterone is produced by __________, which lie between the seminiferous tubules.
interstitial cells
The process of producing the male gamete, __________, begins at puberty and continues throughout life.
spermatogenesis
What stem cell begins the process of spermatogenesis?
Spermatogonium
The countercurrent heat exchange preventing the testes from overheating takes place between the arterial blood and the __________.
pampiniform plexus
How many spermatids result from one spermatogonium?
4
Decline in male reproductive functions occur during __________.
andropause
A(n) _____ is formed during fertilization, when the sperm and ovum fuse.
zygote
The movement of sperm, testicular fluids, and secretions from the prostate gland and seminal vesicle into the urethra is known as __________.
emission
Erection is:
triggered by a parasympathetic reflex.
A white, milky, somewhat sticky mixture of sperm and fluids from accessory glands constitutes __________.
semen
Meiosis is a special type of cell division that produces __________.
gametes
Which of the following hormones is the primary regulator of spermatogenesis?
Testosterone
If fertilization does not occur, the corpus luteum __________.
degrades into the corpus albicans
Which of the following phases occurs first during the ovarian cycle?
Follicular phase
The phases of the uterine cycle are:
menstrual, proliferative, and secretory phases.
The female equivalent to the male penis is the __________.
clitoris
In females, meiosis is not completed until __________.
fertilization occurs
The internal female genitalia include the ovaries, uterine tubes, uterus, and __________.
vagina
The primary function of the uterus is to __________.
receive, protect, and nourish a fertilized ovum
Of the 2 million oogonia formed before birth that begin to undergo meiosis, only about __________ remain at puberty.
300,000
Ovulation depends on which of the following factors?
A surge of luteinizing hormone (LH)
Which of the following sexually transmitted infections (STIs) is linked with many cases of cervical cancer?
Human papillomavirus (HPV)
Oogenesis in a female begins __________.
before birth
The basic difference between spermatogenesis and oogenesis is that:
in oogenesis, one mature ovum is produced, and in spermatogenesis, four mature sperm are produced from the parent cell.
Which portion of the uterus is shed during menstruation?
Stratum functionalis of the endometrium
Assuming a 28-day ovarian cycle, on what day should ovulation occur?
Day 14
In a female, follicle-stimulating hormone (FSH) and luteinizing hormone (LH) target the __________.
ovaries
The part of the endometrium that undergoes cyclical changes in response to sexual hormonal levels is the __________.
stratum functionalis
Female reproductive capabilities end and reproductive organs begin to atrophy during __________.
menopause
Which of the following ducts travels through the prostate gland?
ejaculatory duct
Which portion of the penis is called the foreskin?
prepuce
What is the main female gonad?
ovary
Where does fertilization usually occur?
ampulla of the uterine tube
When are all oogonia formed in females?
before birth
Which of the following is the first phase of the ovarian cycle?
follicular phase
Which is NOT a bacterial sexually transmitted infection (STI)?
genital herpes
Enlargement of the prostate gland can constrict the:
ejaculatory duct.
If a couple want to have sexual intercourse, and they do not wish to use a behavior method as a form of birth control since they know it comes with high risk. What could be an alternative method?
condoms
A male bodybuilder takes testosterone supplements to increase his muscle mass. After three weeks, which of the following do you expect to observe?
Excess testosterone inhibits production of gonadotropin-releasing hormone (GnRH).
The reduction in the number of chromosomes to half the normal count occurs during
meiosis
What shuffles the alleles and causes homologous chromosomes to no longer be identical during meiosis?
crossing over
From one original cell, four genetically unique daughter cells, each with 23 nonreplicated chromosomes, are produced at the conclusion of meiosis II of spermatogenesis.
True
During an erection, blood from the testicular arteries fills the vascular spaces of the corpus spongiosum of the penis.
False
The round ligaments connect each ovary to the uterus and receive an oocyte during ovulation.
False
Which of the following can be fertilized?
secondary oocyte
What type of birth control may prevent pregnancy by manipulating the hormones and interfering with ovulation?
hormonal method
Barrier methods of birth control prevent sperm from moving beyond the vagina and include condoms, diaphragms, cervical caps, and the sponge.
True
The common viral sexually transmitted infections (STIs) are chlamydia, gonorrhea, syphilis, and trichomoniasis.
False
The space between the labia minora, the ‘entryway’ to the vagina and urethra
Vestibule
Consists of an internal and external sphincter that control defecation
Anus
The female gonad
Ovary
Deoxygenated blood is returned from the female gonad
Ovarian vein
Thin, hairless ‘lips’ that form the vestibule and join anteriorly as the prepuce
Labia minora
Stores urine for elimination
Urinary bladder
The narrow neck of the uterus that extends into the vagina and dilates during childbirth
Cervix
Smooth muscle This hood of skin covers the sensitive glans clitoris
Prepuce of the clitoris
Stores feces and initiates the defecation reflex when stretched
Rectum
This erectile tissue moves the labia apart during arousal to open the vestibule
Vestibular bulb
This connective tissue anchors the ovary to the uterus
Ovarian ligament
This gland opens into the vestibule and lubricates the opening to the vagina
Vestibule gland
This female organ consists of erectile tissue anchored along the pubis bones that
extends externally
Clitoris
This round connective tissue anchors the uterus anteriorly
Round ligament
Large, protective skin folds, these ‘lips’ contain fat and are covered in pubic hair after
puberty
Labia majora
Delivers oxygenated blood to the female gonad
Ovarian artery
This muscular tube receives the penis during copulation and acts as the birth canal
Vagina
tube that delivers urine from kidneys to urinary bladder
Ureter
The ‘head’ of the clitoris, dense with sensory neurons
Glans clitoris
Urine from the urinary bladder is eliminated through this tube
Urethra
The organ where a fertilized ovum implants and grows; the ‘womb
Uterus
This organ delivers ova from the ovary to uterus; fertilization usually occurs here
Uterine tube
Urine elimination tube found in the corpus spongiosum of the penis
Spongy urethra
Stores urine for elimination
Urinary bladder
Portion of the urine elimination tube that runs through the prostate gland
Prostatic urethra
Consists of an internal and external sphincter that control defecation
Anus
This short tube delivers sperm and seminal vesicle fluid inside the prostate gland to the
urethra
Ejaculatory duct
This gland is inferior to the urinary bladder and secretes about 1/3 of the fluid found in
semen
Prostate gland
This tube delivers sperm from the testes to the seminal vesicles
Ductus deferens
This net-like vessel returns deoxygenated blood from the male gonad and acts as a heat
exchanger
Pampiniform plexus
The ‘head’ of the penis, dense with sensory neurons
Glans penis
The skin and muscle of this organ protects and regulates the temperature of the testis
Scrotum
The softer erectile body along the inferior portion of the penis; the urethra is found here
Corpus spongiosum
Delivers oxygenated blood to the male gonad
Testicular artery
The male gonad
Testis
Urine elimination tube that passes through pelvic floor
Membranous urethra
These paired glands are posterior to the urinary bladder and secrete about 2/3 of the
fluid found in semen
Seminal vesicles
Long tube along the testes where sperm mature
Epididymis
The two stiff erectile bodies of the penis found superiorly
Corpora cavernosa
The male copulatory organ that enlarges during arousal
Penis
Stores feces and initiates the defecation reflex when stretched
Rectum
The ‘foreskin’ that protects the sensitive glans penis
Prepuce
Smooth muscle tube that delivers urine from kidneys to urinary bladder
Ureter