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Mock Exam IB DP Biology HL Paper 1 Set 10

Question

 The diagram shows the side view of the human elbow. Which structure is the radius?

Answer/Explanation

 

Question

Glucose moves from the filtrate in the nephron into the bloodstream during normal kidney function.
Which location and method describe this movemen t of glucose?

Answer/Explanation

 

Question

What is the role of HCG in early pregnancy?
A. It prevents the degeneration of the corpus luteum in the ovary.
B. It initiates the development of the uterus lining.
C. It inhibits the production of estrogen.
D. It stimulates uterine contractions.

Answer/Explanation

 

Question

The micrograph shows a glomerulus and Bowman’s capsule, where ultrafiltration takes place in the kidney.

What facilitates the formation of glomerular filtrate?
A. Many fenestrations in walls of capillaries in the glomerulus
B. High pressure in the Bowman’s capsule
C. ADH secreted by the pituitary gland
D. Osmosis caused by a high concentration of urea in the blood

Answer/Explanation

 

Question

 Hormones maintain the thickness of the endometrium during pregnancy. However, insufficient levels of hormones in early pregnancy may cause the breakdown of the endometrium, which leads to miscarriage. What could be a cause of miscarriage in early pregnancy?
A. The embryo does not produce enough HCG.
B. The pituitary gland does not produce enough FSH.
C. The endometrium does not produce enough progesterone.
D. The ovarian follicle does not produce enough estrogen.

Answer/Explanation

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