The SA Node is the heart's normal pacemaker. When the SA Node depolarizes, electrical signal spreads through the atrial muscle causing contraction.
Explanation:
Inherent rhythmicity / automaticity - The property of the pacemaker cells of the heart to start electrical sequence of depolarization and repolarization.
SA Node or Sino-atrial Node generates the electrical signal.
The electrical signal passes through internodal pathways, atrial fibres, atrioventricular node (AV Node), the bundle of His, Purkinje fibres, right bundle branch, left bundle branch.
Systole - Contraction of cells when the electrical signal of depolarization reaches the contractile cells.
Diastole - Relaxation of cells when the electrical signal of repolarization reaches the myocardial cells.
Answer:
1 = veins
2 = cardiovascular system
3 = fibrin
4 = target heart rate
5 = maximal heart rate
Answer:
The antibiotic used to fight the body's bacteria and classified as a quinolone is Floxin.
Explanation:
Floxin is the commercial name of Ofloxacin, a 2nd generation quinolone used in the treatment of infections by gram positive and gram negative germs. Its mechanism of action is to inhibit enzymes important for bacterial development, such as DNA gyrase and Topoisomerase IV.
Ofloxacin can be used for infections of the eyes, ears, skin and genitourinary system, including some sexually transmitted infections. Other 2nd generation quinolones are ciprofloxacin and norfloxacin.
Ofloxacin comes in tablets form, so it is only administered orally.
The other options are not correct because:
<em> B. Cardura is not an antibiotic but an alpha-blocker type of medicine, used in the treatment of prostatic hyperplasia.</em>
<em> C. Vibramycin is doxycycline, an antibiotic, but of the tetracycline family.</em>
<em> D. Zovirax is aciclovir, an antiviral medication.</em>
Answer:
Explanation:
The umbilical cord is a narrow tube-like structure that connects the developing baby to the placenta. The cord is sometimes called the baby's “supply line” because it carries the baby's blood back and forth, between the baby and the placenta.
