Answer:
I believe it is B.
Explanation:
Hope my answer has helped you and if not i'm sorry.
Answer:
The correct answer will be option-A.
Explanation:
The cardiac cycle of the heart is divided into two phases: contraction (systole) and relaxation (diastole).
The atria and ventricles of the heart contract simultaneously in response to the impulse generated in the SA node. The contraction of the atria and ventricles push the blood or pumps the blood.
The atrial systole pumps blood to ventricles whereas the ventricular systole pumps blood to the body parts.
Thus, option-A is the correct answer.
Answer:
The answer is A promote an increase in blood pressure
Explanation:
Aldosterone is a mineralocorticoid hormone produced in the renal cortex and acts by retaining sodium and eliminating potassium which leads to an increase in blood pressure.
Answer:
Out of the four given statements, the false statement is
option d)
Explanation:
a) Muscle mass and hence water content is greater in males than in females
b) Transcellular fluid is the portion of total water content in the body which is contained within the lined spaces of epithelial tissue. It is a part of the extracellular fluid which includes plasma and lymph can also be considered as tanscellular fluid.
c) Na+ and Cl- are the major content of extracellular fluids
d) About 60% of water inside the body is contained within extracellular and not in intra cellular.
Answer: D. Contractility of the heart muscle refers to the force of contraction that this muscle can exert.
Explanation:
The myocardial contractility is ability of the heart muscles to contract. This is achieved by the forces which develop between the contracting muscles caused by the filaments of actin and myosin.
The degree of binding of the muscle filaments dependents upon the calcium ion concentration. These actions are controlled in vivo by the sympathetic nervous system. It is driven by the release of the catecholamine, which is a process which determines the calcium ion concentration inside the cytosol of the muscles of the heart.
