The following is a list of several levels of organization that make up the human

Question

The following is a list of several levels of organization that make up the human body. Cell Organ Organelle Organism Organ system The correct order from the smallest to the largest level would be: 2.4, 1, 3, 6, 5 4.2.1, 3.6.5 4.2.3.1.6.5 2, l, 4, 3, 5.6 If your muscles are not getting enough oxygen the secretion of the hormone erythropoietin (EPO) is stimulated resulting in the production of rod blood cells. EPO secretion is inhibited when muscles have enough oxygen. This method of regulating hormone concentration is called? hierarchy erythropoietin negative feedback positive feedback How many electrons would an atom of chlorine (atomic number = 17) have in its valence energy shell? 2 7 8 17 Which of the following substances has the highest H+ concentration? urine. pH = 6 lemon juice, pH = 2 tomato juice, pH = 4 white wine, pH = 3 "Lactose rightarrow Galactose + Glucose" represents an enzymatic reaction. What statement about this reaction is true? lactose is the enzyme in this reaction galactose is the substrate in this reaction this reaction is a type of exchange reaction this reaction is a type of decomposition (catabolic) reaction the four main types of macromolecules found in cells are: proteins. DNA. RNA and steroids proteins, nucleic acids, carbohydrates, and lipids nucleic acids, carbohydrates, monosaccharides, and proteins RNA. DNA. proteins, and carbohydrates A cell that needs a lot of energy to perform its function would be expected to have a lot of: ribosomes Golgi apparatus endoplasmic reticulum mitochondria Which process is common between aerobic respiration and anaerobic fermentation? citric acid (Krebs) cycle glycolysis electron transport chain all of the above

Explanation / Answer

1. The level of organisation is as follows:

The correct answer is option A.

2. Negative Feedback. A negative feedback system in which tissue oxygenation controls EPO production and EPO controls RBCs production, provides homeostasis in oxygen delivery to the body tissues. Option B

3. Option b. The valence electrons are the number of electrons present in the outermost shell of an atom. For chlorine, its 7.

4. Option B. pH is negative logarithm of hydrogen ion concentration.

pH= - Log [ H+]

[H+] = 10-pH

a. Urine, pH= 6, so [H+] = 10-6

b. Lemon juice, pH=2, So [H+]= 10-2

c. Tomato juice, pH= 4, So [H+] = 10-4

d. Whit wine, pH=3, SO [H+]= 10-3

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