The structure that carries urine from the kidney to the bladder is the:
A. Ureter
B. Renal pelvis
C. Urethra
D. Calyx
Answer: Option A
Solution (By JKExamLibrary)
The ureters are two muscular tubes that propel urine from the renal pelvis of each kidney to the urinary bladder via peristaltic contractions. Urethra exits bladder, renal pelvis and calyces are within the kidney.
Consider statements about human immunity: 1. Colostrum provides passive immunity to infants. 2. Allergies are exaggerated immune responses. 3. Autoimmune diseases occur when the immune system attacks self-cells. Which are correct?
Explanation:
Colostrum, the first milk produced by the mother, is rich in IgA antibodies, providing natural passive immunity to the newborn. Allergies (hypersensitivities) occur when the immune system overreacts to harmless environmental antigens (allergens). Autoimmune diseases arise when the immune system loses tolerance and mistakenly attacks the body's own healthy cells and tissues. All statements are correct.
Explanation:
The epiglottis is a cartilage flap that covers the glottis (laryngeal opening) during swallowing, directing food into the esophagus and protecting the airway. The tongue manipulates food, the uvula prevents nasal regurgitation.
Explanation:
Scurvy is characterized by bleeding gums, impaired wound healing, and anemia due to defective collagen synthesis from lack of vitamin C (ascorbic acid). Beriberi is B₁ deficiency, pellagra B₃, night blindness vitamin A.
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