Sperm cells get energy to power their movement from secreted by the
fructose; seminal glands
fructose; prostate gland
glucose; bulbourethral glands
glucose; seminal glands
fructose; seminiferous gland
The Correct Answer is A
A. fructose; seminal glands: The seminal vesicles (seminal glands) secrete a viscous fluid that contains high concentrations of fructose. This monosaccharide serves as the primary glycolytic fuel for the mitochondria in the sperm midpiece to produce ATP. This energy is essential for the flagellar lashing required for motility.
B. fructose; prostate gland: While the prostate contributes citrate and enzymes to the semen, it is not the primary source of the sugar used for sperm energetics. The prostatic fluid is slightly acidic and focuses more on the activation of sperm and the liquefaction of the coagulum. Fructose production is localized to the seminal vesicles.
C. glucose; bulbourethral glands: The bulbourethral glands primarily secrete a clear mucus that serves to lubricate the urethra and neutralize acidic urine. They do not produce significant quantities of simple sugars like glucose or fructose for sperm nutrition. Their contribution is protective and preparatory rather than nutritive.
D. glucose; seminal glands: Although glucose is the common metabolic sugar in the blood, the seminal glands specifically synthesize and secrete fructose. Fructose is preferred in the seminal environment and is the standard marker used in clinical labs to verify the secretory function of the seminal vesicles. Glucose is not the primary seminal sugar.
E. fructose; seminiferous gland: There is no anatomical structure officially termed a "seminiferous gland." The seminiferous tubules are the site of sperm production, but the fluid they produce is minimal and lacks the concentrated nutrient load found in the secretions of the accessory glands. Fructose is added later in the ductal system.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is E
Explanation
examinations, self-exams, and mammography. A Pap smear involves collecting cells from the reproductive tract and cannot detect malignant transformations within the glandular tissue of the breast. These two screening processes target entirely different organ systems.
B. uterine cancer: While a Pap smear may occasionally pick up abnormal endometrial cells, it is not the standard diagnostic tool for uterine or endometrial cancer. Endometrial biopsy or transvaginal ultrasound are the preferred methods for evaluating the uterine lining. The Pap smear specifically targets the squamous and columnar cells of the lower tract.
C. penile cancer: This rare malignancy is usually identified through visual inspection and biopsy of lesions on the glans or shaft of the penis. The Pap smear is a gynecological procedure designed for female anatomy. There is no equivalent cytological brush test used as a standard screening for penile tissue in asymptomatic males.
D. testicular cancer: Testicular cancer is typically detected through physical palpation, scrotal ultrasound, and blood markers such as alpha-fetoprotein. Because the testes are sequestered within the scrotum and do not shed cells into a mucosal canal, a cytological smear is not a viable method for detecting these tumors.
E. cervical cancer: The Papanicolaou smear is a cytological screening test specifically designed to detect premalignant and malignant cells in the ectocervix and endocervical canal. By examining cells scraped from the transformation zone, clinicians can identify human papillomavirus (HPV) induced changes. This test has significantly reduced the mortality rate associated with cervical malignancy.
Correct Answer is A
Explanation
A. Bowman's capsule and glomerulus: The renal corpuscle represents the initial blood-filtering component of the nephron. It consists of the glomerulus, a tuft of fenestrated capillaries, surrounded by a double-walled epithelial cup called the glomerular capsule. This structure facilitates the production of filtrate from the blood.
B. the renal pyramid: These cone-shaped tissues are located within the renal medulla and contain the straight segments of nephrons and collecting ducts. While they house parts of the renal system, they are macroscopic anatomical regions rather than the microscopic corpuscle. They do not participate in the initial filtration process.
C. the descending nephron loop: This portion of the renal tubule extends from the proximal convoluted tubule into the renal medulla. It is specialized for water reabsorption via osmosis and is not involved in the initial filtration of blood. The corpuscle always precedes the tubular segments in nephron anatomy.
D. the kidney cortex and medulla: These terms describe the primary internal layers of the kidney organ. The cortex contains the renal corpuscles and convoluted tubules, while the medulla contains the renal pyramids. These are broad anatomical zones rather than the specific components of a single renal corpuscle.
E. the renal papilla: The papilla is the apex of a renal pyramid that empties urine into the minor calyx. It consists of the distal ends of collecting ducts where final urine concentration occurs. It is located far downstream from the site of initial filtration in the corpuscle.
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