The normal pulse rate for humans is usually 60 to 100 beats per minute, however, there are certain medical conditions such as cardiac arrhythmia which may alter the normal pulse rate of an individual. Other influencing factors include your age, gender and fitness level.
Aldosterone is a hormone secreted by the adrenal cortex, and insulin is a peptide secreted by the pancreas. When aldosterone contacts a target cell, it binds to an intracellular receptor and migrates to the nucleus; insulin binds to extracellular receptors on the plasma membrane. What is the most likely reason for this difference? a. Aldosterone is hydrophilic and therefore must enter the aqueous environment of the cytoplasm to have an effect. b. Aldosterone is lipid-soluble and therefore easily crosses the phospholipid bilayer of the plasma membrane.
Aldosterone is a steroid secreted by the cortex of the adrenal gland. It is. the most potent hormone regulating the body's electrolyte balance. Aldosterone acts directly on the kidney to decrease the rate of sodium-ion excretion (with accompanying retention of water), and to increase the rate of potassium-ion excretion. The secretion of aldosterone appears to be regulated by two mechanisms. First, the concentration of sodium ions may be a factor since increased rates of aldosterone secretion are found when dietary sodium is severely limited. Second, reduced blood flow to the kidney stimulates certain kidney cells to secrete the proteolytic enzyme renin, which converts the inactive angiotensinogen globulin in the blood into angiotensin I. Another enzyme then converts angiotensin I into angiotensin II, its active form. This peptide, in turn, stimulates the secretion of ...