What organ controls the production of red blood cells? Heart Kidney Hypothalamus

Question

What organ controls the production of red blood cells? Heart Kidney Hypothalamus. Bone Marrow Spleen. provide nutrient molecules for growing embryos before the true lowers begin photosynthesizing. Flowers. Roots. Leaflets. Sclerenchyma cells. Cotyledons. What organ is both endocrine and exocrine gland? Hypothalamus. Pancreas. Pituitary. Placenta All of the above. What can cause goiter to develop in a person? Too much cold weather. Excessive thyroxine production. Cretinism Too little iodine Excessive calcitonin production. Chemicals for insect communication are called Ecdysones. Protosones Pheromones Deutrostomes None of the above. Which of the following is a false statement about innate immunity? They must be primed by the presence of antigens. They include inflammatory responses. Macrophages and natural killer cells are participants in the process. They may involve the formation of membrane attack complexes. They include physical and chemical

Explanation / Answer

90) A. RBCs are produced in bone marrow under the control of Erythropoietin(EPO) hormone. EPO is produced by the juxtaglomerular cells in the kidney in response to increased level of androgens and decreased level of Oxygen.

91)E. the embryonic leaf cotyledons provide energy for the embryo.

92)B. the pancreas is both digestive exocrine gland and hormone-producing exocrine gland.

93)B. excessive thyroxine production can cause goiter. Thyroxine is the hormone produced by the thyroid gland.

94)C. Insects communicate through pheromones.

95)A. they must be primed by the presence of antigens.

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