The human body is made up of trillions of cells. Cells of the nervous system, called nerve cells or neurons, are specialized to carry "messages" through an electrochemical process. The human brain has approximately 100 billion neurons.
Survival of the fittest. The strongest offspring will survive to adulthood and reproduce - their offspring will have stronger genes than prior generations. The weaker offspring will not live to adulthood and not produce offspring, therefore the weaker traits will die out with each generation
Heart attack and strokes are caused by interruptions to the normal flow of blood to the heart or brain. without access to oxygen-rich blood and nutrients, heart or brain cells begin to malfunction and die. this cell death can set off a series of harmful effects throughout the body.
Answer:
1. Ventricular depolarization −−QRS complex
2. Total time it takes for the ventricular muscle to depolarize and repolarize −−QT interval
3. Atrial depolarization −−P wave
4. Conduction through the atrioventricular (AV) node −−PR segment
5. Ventricular repolarization −−T wave
6. The ventricles are in their depolarized state −−ST segment
7. Conduction through the atrioventricular (AV) bundle −−Q wave
Explanation:
ECG or electrocardiogram is the graphical representation of the heart's rhythm and electrical activity measured by electrical signals. The contraction of the heart shows electrical activity.
There are various deflections shows from baseline and known as specific waves and there are also some flat lines between waves called intervals. This atrial depolarization is called P wave and ventricular repolarization called T wave and the time between ventricular muscles depolarization ( QRS complex) and repolarization is QT interval. Conduction through the atrioventricular (AV) bundle is known as Q wave.
Answer:
X chromosome
Explanation:
In humans, sons always get one copy of the X chromosome from the mother and the Y chromosome from the father. Therefore, X-linked traits in males are inherited from mothers. Color-blindness is an X-linked recessive disease in which the responsible gene is present on the X chromosome. Sons get an X-linked gene for the colorblindness from a carrier or the affected mothers. For example, a female with X^cX would give the X^c chromosome to half of her sons.