28 Questions
Where are the tonsils located in the human body?
In the pharyngeal mucosa
Which lymphoid organ filters bacteria and viruses from the blood?
Spleen
What is the first line of defense in the body's immune system?
Skin
Which type of immune response is known as the adaptive immune response?
(Adaptive) immune response
What is the main function of the thymus gland?
Programs lymphocytes
What type of immune response occurs following re-exposure to a particular antigen?
Secondary immune response
When does the primary immune response typically begin following exposure to an antigen?
3-6 days
What happens to the antibody titre after the primary immune response?
Falls within 28 days
Which cells remain after the primary immune response and contribute to long-term immunity?
Memory cells (B and T)
Which method of acquiring immunity involves receiving antibodies from an external source?
Passive immunity
In which case is a person naturally immune to a disease due to having the disease previously?
Natural, Active immunity
What is the function of the stomach lining folds called rugae?
To begin digestion of proteins
Which substance is needed for vitamin B12 absorption in the stomach?
Intrinsic factor
What is the role of pepsin in the stomach?
Digests proteins
Which of the following is NOT true about gastric juice?
Functions to absorb nutrients directly into the blood
What is the pH optimum for the activity of active pepsin in gastric juice?
$pH ext{ optimum} < 2$
Where are most of the structures of the nephron located?
In the cortex
Which blood vessel brings blood to the glomerulus for filtration?
Interlobular artery
What is the site of filtration in the kidney?
Bowman’s capsule
Which process in urine formation separates substances by particle size?
Filtration
What surrounds the capsular space in the renal corpuscle?
Bowman's capsule
Which part of the nephron is responsible for reabsorption and secretion?
Proximal convoluted tubule
What is the function of the Cowper's gland?
Neutralizes acidic pH of the urethra
Where are the seminal vesicles located in the male reproductive system?
Posterior to the bladder
What is the primary function of the prostate gland in the male reproductive system?
Produce milky fluid that inhibits bacteria
Which structure contracts to propel sperm through the ejaculatory duct?
Seminal vesicle
What is the role of fructose in seminal fluid?
Nourishes and activates sperm
Which part of the male reproductive system surrounds the urethra and is inferior to the urinary bladder?
Prostate gland
Test your knowledge on lymphoid organs such as tonsils, thymus gland, and spleen, along with the body's non-specific defenses like the inflammatory response and natural killer cells. Learn about the roles of different lymphoid organs and defense mechanisms in the human body.
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