The mitochondria and chloroplasts are much different in structure than bacteria
Answer:
refrain from using or disposing of (something); retain for future use.
Explanation:
Answer:
c. The lungs are able to rid the body of a wide variety of acidic and basic substances, thereby directly adjusting the pH of the blood
Explanation:
Lungs help maintain the blood pH by regulating the partial pressure of CO2 and thereby, the amount of hydrogen and bicarbonate ions in the blood. As CO2 enters the blood, it is converted to carbonic acid (H2CO3) which in turn dissociates into hydrogen ions and bicarbonate ions. As the H+ concentration increases, the blood pH decreases. The increased breathing rate and increased gaseous exchange in the lungs compensate for the change in the blood pH. Removal of CO2 from blood reduces the H+ concentration in the blood and thereby, the blood pH is increased towards the normal range.
Activation of pepsinogen starts when hydrocholoric acid (HCl), which is secreted by the parietal cells partially activates pepsinogen (pepsinogen* in figure). This partially active enzyme then cleaves the peptide from other pepsinogen molecules to form active pepsin.
Answer:
The correct answer will be option-C
Explanation:
Endocrine glands are the organs of the endocrine system which control the functions of the body by directly secreting the chemical messengers (hormones) into the bloodstream which can act on the distant organs (target organs).
The main endocrine glands of the human body are the pituitary glands present in the brain, pineal gland in the brain, adrenal gland in kidney and the thyroid gland in the neck but the pancreas act as both endocrine and exocrine gland.
Eighty-five percent of the mass of the pancreas secretes digestive enzymes and is considered exocrine whereas only fifteen percent is considered the endocrine as it secretes the insulin hormone.
Thus, Option-C is the correct answer.