Hydrogen bonds differ from covalent bonds. Hydrogen bonds form due to the positive charge of a molecule being attracted to the negative charge of a water molecule.
This is due to water being a polar substance. Polar substances have covalent bonds where the electrons are shared unequally. This creates a slight charge at each end of the molecule. This charge is what creates a hydrogen bond between a water molecule and another molecule. Hydrogen bonds are weaker than covalent bonds.
The solution is B.
Density dependent factors are those that regulate the growth of a population depending on its density while density independent factors are those that regulate population growth without depending on its density
In myocardial infarction, blood flow is blocked in the heart, causing a heart attack to occur.
In cardiac arrest, the heart malfunctions and causes the heart to stop beating unexpectedly.
You can think of a myocardial infarction (MI) as a circulation issue, whereas cardiac arrest is an electrical issue.
Answer:
C. Aldosterone increases sodium reabsorption by increasing the number of Na+-K+ ATPase pumps in the luminal membrane of the proximal tubule.
Explanation:
The terminal part of distal convoluted tubules has two different types of cells: principal cells and intercalated cells. These cells are also present throughout the collecting duct. The principal cells serve to reabsorb Na+ and secrete K+ and have receptors for aldosterone and antidiuretic hormone (ADH).
The function of intercalated cells reabsorb HCO3 - and K+ and to secrete H+. Angiotensin II stimulates the adrenal cortex to release aldosterone which in turn stimulates the principal cells in the collecting ducts to reabsorb more Na+ and secrete more K+. The increased reabsorption of Na+ facilitates reabsorption of more water to increase blood volume and blood pressure.
Answer:
Seismic waves are the waves of energy caused by the sudden breaking of rock within the earth or an explosion. They are the energy that travels through the earth and is recorded on seismographs. There are several different kinds of seismic waves, and they all move in different ways.
