Answer:
The correct answer is D.
Explanation:
Bordetella pertussis is a gram-negative coccobacillus that causes a disease called whooping cough.
The bacterium infests the patients by colonizing lung epithelial cells. To do so, it requires adhesins, called filamentous haemagglutinin, fimbriae and pertactin. Once the bacterium is attached to the lung epithelial cells, it produces a cytotoxin that prevents their cilia from moving.
Another virulent factor from B. pertussis is the pertussis toxin, which alters host immune system through the inhibition of phagocytes response to it.
Answer:
a. in the bottom of the atrium just above the ventricles
Explanation:
AV node -
It helps to control the heart rate , it serves as an electrical relay station , reduces the electrical current which is sent by the SA node .
The location of the AV node , is at the lower back section of the inter atrial septum , and conducts the electrical impulse normally from the atria to ventricles .
Answer:
the total volume divided by time mutiplied by the drop factor = flow rate
Explanation:
Answer:
Basal cell carcinoma, which accounts for nearly 3 out of 4 skin cancers, is the slowest growing. Squamous cell carcinoma is somewhat more aggressive and more inclined to spread
Answer:
Waste products excreted by kidney are uric acid, urea, creatinine and salts.
Explanation:
Kidneys are the bean shaped organs involved in the process of excretion. The nephrons are present in the kidney acts as the main filtration unit of the excretory system.
The urine is formed by the kidney including three main process - glomerular filtration, tubular reabsorption and tubular secretion. The urine contains excess ions, phenols and sulfates. Some amount of uric acid and creatinine are excreted by the kidney.
