Final Flashcards
Sperm production occurs in the
seminiferous tubules
Secondary spermatocytes each contain
23 chromosomes.
The organ that monitors and adjusts the composition of tubular fluid, recycles damaged spermatozoa, and is the site of sperm maturation is the
epididymis.
Where in the male reproductive system would you expect to find the most mature spermatozoa?
in the ductus deferens and ejaculatory duct
Which of the following glands secretes fructose to nourish the sperm?
seminal gland (seminal vesicle)
Semen contains all of the following, except
spermatogonia.
During meiosis I, maternal and paternal chromosomes fuse together during the process called ________ to form a ________.
synapsis; tetrad
The delicate layer of serous membrane that covers the testis is called the
tunica vaginalis.
The erectile tissue that surrounds the urethra is the
corpus spongiosum.
Inward projections of the tunica albuginea, known as septa, divide the testis into
lobules.
Interstitial cells produce
androgens.
The spermatic cord is
Correct a bundle of tissue that contains the ductus deferens, blood vessels, nerves, and lymphatics that serve the testis.
Straight tubules originate at the seminiferous tubules and form a network of passageways called the
rete testis.
The urethral meatus is an opening in the
glans penis.
The special type of cell division required to produce gametes is called
meiosis.
The role of FSH in males is to
initiate sperm production in the testes.
The cells that are formed during spermatogenesis by the first meiosis are called
secondary spermatocytes.
The external marking of the boundary between the two testes is the
raphe.
The dense layer of connective tissue that surrounds the testis is called the
tunica albuginea.
The organ that produces a secretion that contains fructose, prostaglandins, and fibrinogen is the
seminal gland (seminal vesicle).
Testosterone is secreted by the
interstitial cells.
The reproductive system includes
All of the answers are correct.
Which of the following occurs after a spermatogonium completes cell division?
One daughter cell is directed toward the lumen of the seminiferous tubule.
Which of the following muscles move the testes toward the body?
both the cremaster and the dartos muscles
Arrange the four structures listed below into the order in which sperm pass from the testis to the urethral meatus.
- ductus deferens
- urethra
- ejaculatory duct
- epididymis
Correct 4, 1, 3, 2
When spermatogonia divide, the daughter cells are called
spermatocytes.
The organ that surrounds the urethra and produces an alkaline secretion is the
prostate gland.
The nurse cells of the seminiferous tubules do all of the following, except that they
secrete testosterone.
How many tetrads form during synapsis?
23
The special type of cell division required to produce gametes is called.
meiosis.
The paired erectile bodies in the penis are the
corpora cavernosa.
Sperm develop from stem cells called
spermatogonia.
A primary spermatocyte matures into ________ spermatids having ________ chromosomes.
four; 23
Testicular nurse cells function in all of the following ways, except that they don’t
secrete progesterone-binding protein.
Which of the following can be found inside the spermatic cord?
blood vessels nerves lymphatic vessels ductus deferens Correct All of the answers are correct.
The small paired structures at the base of the penis that secrete a thick, alkaline mucus are the
bulbo-urethral glands.
The pituitary hormone that stimulates the interstitial cells to secrete testosterone is
LH.
Sperm are moved along the ductus deferens by
peristaltic contractions.
The process of spermiogenesis produces
spermatozoa
Interstitial cells
All of the answers are correct.
The male reproductive system is most closely associated with which of the following systems?
urinary
Nurse cells
are found in the seminiferous tubules. form the blood-testis barrier. coordinate spermatogenesis. secrete the hormone inhibin. Correct All of the answers are correct.
The fold of skin that covers the glans penis is the
prepuce.
A typical ejaculation releases approximately ________ sperm.
250 million
Spermatozoa are functionally matured within the
epididymis.
The organ that carries sperm from the epididymis to the urethra is the
ductus deferens.
The ductus deferens is approximately ________ cm long.
40-45
In a mature human spermatozoan,
the head contains 23 chromosomes.
Aldosterone
promotes sodium retention in the kidneys.
Hypoventilation leads to
respiratory acidosis.
When the pH of the extracellular fluid drops, the
kidneys secrete more hydrogen ions and fewer bicarbonate ions.
Consuming a meal high in salt will
result in a temporary increase in blood volume.
Approximately ________ liters of peritoneal fluid are produced and reabsorbed each day.
7
In an adult female, the body consists of about ________ percent water.
50
Which hormone most affects the osmolarity of blood?
ADH
Substances that can carry electrical current across cell membranes are called
electrolytes.
A chemical that minimizes changes in the pH of a body fluid by releasing or binding hydrogen ion is called a(n)
buffer.
The release of atrial naturetic peptides from the heart will cause the body to
decrease ECF and excrete sodium ions.
Severe kidney damage (such as glomerulonephritis) often leads to
metabolic acidosis.
Exchange between the two main subdivisions of ECF occurs primarily at the
capillaries.
To reduce brain swelling by pulling water out of brain cells, a substance can be injected intravenously to increase the osmotic pressure of interstitial fluid. Which of the following properties can this substance not have in order to be effective?
permeable to brain plasma membranes
Which of the following descriptions best fits the acid-base disorder respiratory acidosis?
consequence of reduced alveolar ventilation; for example, due to emphysema
The most common problems with electrolyte balance are caused by an imbalance between gains and losses of
sodium ions.
In response to respiratory alkalosis, the
kidneys retain more hydrogen ions.
A person with emphysema will exhibit signs of
chronic respiratory acidosis.
Which of the following descriptions best fits the acid-base disorder respiratory alkalosis
consequence of hyperventilation, for example in fever or mental illness
The principal cation in intracellular fluid is
potassium.
A patient who has been both vomiting and having diarrhea is losing ________ from his body.
All answers are correct
All of the following are components of ECF, except
RBCs.
Excess hydrogen ion is eliminated from the body largely by
The kidneys
Calcium reabsorption by the kidneys is promoted by the hormone
Parathyroid hormone
The primary role of the carbonic-acid-bicarbonate buffer system is to
limit pH changes caused by organic and fixed acids.
When pure water is consumed,
osmolarities of the two fluid compartments fall.
Angiotensin II produces a coordinated elevation in the ECF volume by stimulating thirst.
causing the release of ADH.
triggering the production and secretion of aldosterone.
stimulating the kidneys to conserve sodium.
Correct All of the answers are correct.
Which hormone stimulates the thirst mechanism?
ADH
Which hormone plays a central role in determining the rate of sodium reabsorption and potassium secretion?
aldosterone
Secretion of potassium into the urine is
associated with the reabsorption of sodium from the distal tubules and collecting ducts.
Which of the following descriptions best fits the acid-base disorder metabolic alkalosis?
consequence of prolonged vomiting
In a lean adult male, the body consists of about ________ percent water.
60
Antidiuretic hormone
is released from the posterior pituitary gland.
stimulates water intake.
stimulates water conservation by the kidneys.
is produced by the hypothalamus.
Correct All of the answers are correct.
The extracellular fluid (ECF) consists of the
plasma. interstitial fluid. cerebrospinal fluid. lymph. Correct All of the answers are correct.
A person with poorly controlled diabetes mellitus will develop
metabolic acidosis.
About two-thirds of the body fluid is within cells and is termed ________ fluid.
intracellular
Prolonged vomiting can result in
metabolic alkalosis.
Intracellular fluid (ICF) is found only within
the cells of the body.
The ions in highest concentration in the intracellular fluid are
proteins, potassium, and phosphate.
The amount of potassium excreted by the kidneys is regulated mainly by
aldosterone.
Which hormone(s) is released by heart muscle in response to excessive chamber volume?
natriuretic peptides
When water is lost, but electrolytes are retained,
osmosis moves water from the ICF to the ECF.
A patient on a ventilator subjected to excessive minute volume is at risk for
respiratory alkalosis.
A person who consumes large amounts of sodium bicarbonate (“baking soda”) to settle an upset stomach risks
metabolic alkalosis.
Which of the following will stimulate thirst?
drying the mucosa of the mouth and pharynx
angiotensin II acting on the hypothalamus
an increase in the osmotic pressure of interstitial fluid within the hypothalamus
stimulation of osmoreceptors
Correct All of the answers are correct.
Waves of muscular contractions that propel the contents of the digestive tract are called
peristalsis.
If the lingual frenulum is too restrictive, an individual
All of the answers are correct
The ________ gland empties into the oral cavity at the level of the second upper molar.
parotid
The layer of loose connective tissue that directly supports the digestive epithelium is the
lamina propria.
A structure that helps prevent food from entering the pharynx prematurely is the
uvula
Put the following layers of the digestive tract wall in order from the lumen to the deepest layer:
4, 1, 6, 3, 2, 5