Answer:
<h3>Red bone marrow</h3>
Explanation:
Red bone marrow fills the cavity of nearly every bone in children. Hemopoietic tissue makes blood cells. Red bone marrow is found in the skull, vertebrate, ribs, sternum, proximal head of the humerus and femur.
In an adult, hematopoiesis is confined primarily to <u>"red bone marrow."</u>
As a result, the correct answer is red bone marrow.
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.
Answer:
(B). inhibiting HMG-CoA reductase.
Explanation:
Lovastatin is a drug, which is used to reduce risk for cardiovascular diseases and to reduce level of cholesterol in blood.
It works by inhibiting HMG-CoA reductase (3-hydroxy-3-methylglutaryl-coenzyme A reductase) enzyme, required for the formation of mevalonate from HMG-CoA.
Mevalonate is building block for the biosynthesis of cholesterol. Hence, lovastatin inhibits cholesterol production by inhibiting synthesis of mevalonate.
Thus, the correct answer is option (B).
Answer: A vaccine works by flowing in your blood and getting rid of the toxic or bad germs in your body.
Explanation:
