Q. Choose the statement that does not correctly characterize the kidneys.
A. The kidneys are positioned retroperitoneally.
B. The right kidney is usually 5 to 2 centimeters higher than the left one.
C. The kidney is padded by a layer of fat.
D. Inside the kidney there is a hollow chamber called the renal sinus.
Answer- The right kidney is usually 5 to 2 centimeters higher than the left one.
Q. The granular appearance of the renal cortex is due to ________________.
A. the positioning of blood vessels within this area
B. polycystic kidney disease
C. the random distribution of nephrons in this area
D. the positioning of the renal columns
Answer- the random distribution of nephrons in this area
Q. Which of these is not a function of the kidneys?
A. The kidneys deactivate vitamin D and stimulated the activity of osteoclasts.
B. The kidneys help control the rate of red blood cell production.
C. The kidneys help to regulate blood pressure.
D. The kidneys regulate the composition, volume, and pH of body fluids.
Answer- The kidneys deactivate vitamin D and stimulated the activity of osteoclasts.
Q. The final branches of the interlobular arteries give rise to the _________________ that carry blood to the nephrons.
A. interlobar arteries
B. arciform arteries
C. efferent arterioles
D. afferent arterioles
Answer- afferent arterioles
Q. Choose the one trait that does not characterize the structure of a nephron.
A. There are two coiled portions of the renal tubule.
B. The glomerular capsule contains podocytes and slit pores.
C. Blood that will be filtered flows into the glomerular capsule.
D. Several nephron tubules merge to form a collecting duct.
Answer- Blood that will be filtered flows into the glomerular capsule.
Q. The concentrations of substances in the plasma, in the glomerular filtrate, and in urine differ in what way?
A. Plasma contains the most water, glomerular filtrate contains less water, and urine contains the least.
B. Plasma and glomerular filtrate are virtually identical, but urine contains proportionately more waste products.
C. Plasma differs from glomerular filtrate and urine, which have virtually identical concentrations of substances.
D. All three have the same concentrations of nutrients and waste materials, but differ in the amount of proteinaceous material they contain.
Answer- Plasma and glomerular filtrate are virtually identical, but urine contains proportionately more waste products.
Q. Which force favors filtration?
A. glomerular capillary hydrostatic pressure
B. capsular hydrostatic pressure
C. glomerular capillary osmotic pressure
D. capsular osmotic pressure
Answer- glomerular capillary hydrostatic pressure
Q. Which factor does not affect glomerular filtration rate?
A. blood pressure
B. osmotic pressure of the glomerular filtrate
C. plasma osmotic pressure
D. concentration of leukocytes in the blood
Answer- concentration of leukocytes in the blood
Q. Juxtaglomerular cells of the juxtaglomerular apparatus secrete _______________ when _______________.
A. angiotensin-converting enzyme; blood pressure increases
B. potassium; chloride concentration declines
C. renin; blood pressure drops
D. atrial natriuretic peptide; blood volume drops
Answer- renin; blood pressure drops
Q. Tubular reabsorption is responsible for retaining nutrients the body requires. Most tubular reabsorption occurs in the _______________ where microvilli, and their numerous carrier proteins, increase the surface area available for reabsorption.
A. distal convoluted tubule
B. proximal convoluted tubule
C. collecting duct
D. nephron loop
Answer- proximal convoluted tubule
Q. Most small proteins are reabsorbed by _______________.
A. active transport
B. osmosis
C. facilitated diffusion
D. pinocytosis
Answer- pinocytosis
Q. Within the renal tubule, two hormones play a role in determining the final volume and sodium concentration of the urine. The hormone _______________ regulates sodium reabsorption, while ________________ regulates water reabsorption.
A. aldosterone; antidiuretic hormone (ADH)
B. cortisol; atrial natriuretic peptide
C. renin; angiotensin II
D. antidiuretic hormone (ADH); epinephrine
Answer- aldosterone; antidiuretic hormone (ADH)
Q. Why is the plant compound known as inulin the best substance to use to measure renal clearance?
A. Inulin tastes good, so patients are more apt to be cooperative.
B. Inulin is neither reabsorbed or actively secreted into the filtrate.
C. Inulin colors the filtrate and thus facilitates scanning of the kidney.
D. Inulin is readily available and inexpensive, and thus makes measuring renal clearance fairly simple.
Answer- Inulin is neither reabsorbed or actively secreted into the filtrate.
Q. Peristaltic muscular contractions are important for conveying urine through the excretory system, much like peristalsis in the digestive tract. Peristalsis of the detrusor muscle of the urinary bladder is controlled by ______________.
A. conscious control of the skeletal muscle
B. sympathetic nervous impulses
C. parasympathetic nervous impulses
D. impulses from the cerebral cortex
Answer- parasympathetic nervous impulses
Q. In males as well as in females, the external urethral sphincter is made up of skeletal muscle, and is thus under voluntary control. Where is the external urethral sphincter located in males?
A. within the urogenital diaphragm
B. within the penile urethra
C. at the external urethral orifice
D. within the prostatic urethra
Answer- within the urogenital diaphragm
Q. Which structure is last in the sequence of urine flow?
A. ureter
B. kidney
C. bladder
D. urethra
Answer- urethra
Q. The outermost structure of a kidney is the _____.
A. cortex
B. medulla
C. capsule
D. pelvis
Answer- capsule
Q. What is the main factor that causes urine to enter the kidneys?
A. pressure
B. peristalsis
C. gravity
D. osmosis
Answer- peristalsis
Q. What is the main factor that promotes bladder infections in the female?
A. length of urethra
B. presence of bacteria in rectum
C. hygiene
D. dietary factors
Answer- length of urethra
Q. Which system functions in the excretion of soluble nitrogenous wastes?
A. gastrointestinal
B. pulmonary
C. urinary
D. integumentary
Answer- urinary
Q. The pyramids are areas located within the _____ of the kidney.
A. cortex
B. pelvis
C. capsule
D. medulla
Answer- medulla
Q. The ureter directly receives urine from the _____ of the kidney.
A. cortex
B. pelvis
C. medulla
D. pyramid
Answer- pelvis
Q. The structure which receives the filtrate from the glomerulus is the _____.
A. proximal convoluted tubule
B. distal convoluted tubule
C. Bowman capsule
D. loop of Henle
Answer- Bowman capsule
Q. Which vessel directs blood into the glomerulus?
A. renal artery
B. afferent arteriole
C. efferent arteriole
D. peritubular capillaries
Answer- afferent arteriole
Q. In which area can the term urine be correctly used?
A. Bowman's capsule
B. collecting duct
C. nephron
D. loop of Henle
Answer- collecting duct
Q. Where does most selective reabsorption occur?
A. loop of Henle
B. Glomerulus
C. distal convoluted tubule
D. proximal convoluted tubule
Answer- proximal convoluted tubule
Q. In the female, the urinary bladder lies posterior to the uterus and vagina.
A. TRUE
B. FALSE
C. Nothing can be said
D. None of the mentioned
Answer- FALSE
Q. It is normal for urine and semen to mix in the male.
A. TRUE
B. FALSE
C. Nothing can be said
D. None of the mentioned
Answer- FALSE
Q. Renal calculi are commonly comprised of urea and calcium salt precipitates.
A. TRUE
B. FALSE
C. Nothing can be said
D. None of the mentioned
Answer- FALSE
Q. The internal urethral sphincter is totally under parasympathetic, autonomic control.
A. TRUE
B. FALSE
C. Nothing can be said
D. None of the mentioned
Answer- TRUE
Q. Persons with spinal cord damage in the lumbar area will no longer have urination reflexes.
A. TRUE
B. FALSE
C. Nothing can be said
D. None of the mentioned
Answer- FALSE
Q. There are about one million nephrons in each kidney.
A. TRUE
B. FALSE
C. Nothing can be said
D. None of the mentioned
Answer- TRUE