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Marat540 [252]
4 years ago
5

30 POINTS!!! PLZ HELP

Biology
2 answers:
OLEGan [10]4 years ago
8 0

Answer:

<em>Option "A" might be the correct answer</em>

<em>Explanation:</em>

<em>there are some of those viruses where it can be quite potent. Some viruses, such as the rhinoviruses, seldom cause serious illness. But others, such as parainfluenza and respiratory syncytial virus, can lead to severe lung infections in young children.</em>

Anit [1.1K]4 years ago
7 0

Answer:

B. Colds can be caused by hundreds of different viruses.

Explanation:

The common cold is a benign viral infection of the upper respiratory tract, which mainly affects the nose and throat. The most common symptoms are: nasal congestion, runny nose, sneezing and sore throat. This is one of the most common diseases that exist. Eventually, everyone will get a cold more than once in their life.

More than 200 viruses can cause colds, all of which are respiratory transmission, which makes contagion extremely effective. Cold viruses enter the body through the lining of the mouth, eyes or nose. The most common is to bring the contaminated hand to the face. This port carries viruses acquired by manual contact with colds or contaminated objects.

There is also the possibility that viruses reach these mucous membranes, through invisible droplets, suspended in the air, after a person with a cold sneezes, coughs or talks. It is estimated that for this form of contagion, there is a need to be less than one meter from the infected person.

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Very small changes in the solute concentrations in the various fluid compartments cause water to move from one compartment to an
Oksana_A [137]

Answer:

a. Decrease water reabsorption : decrease blood pressure.

b. Decrease peripheral resistance : decrease blood pressure

c. Vasodilation : decrease blood pressure

d. Decrease salt intake : decrease blood pressure

e. Decrease blood volume : decrease blood pressure

f. Vasoconstriction : increase blood pressure

g. Increase peripheral resistance:  increase blood pressure

h. Increase salt intake:  increase blood pressure

i. Increase blood volume : increase blood pressure

j. Increase water reabsorption: increase blood pressure

Explanation:

  • Total peripheral resistance: This term refers to the resistance offered by the vascular system to the blood flow.  This resistance is a result of the friction between the blood and the vessel's walls. In other words, it is the opposition of the vessels to blood flow. The total peripheral resistance is the summary of all the bloody circuit resistances in the body. Those mechanisms that induce vasoconstriction conduce to an increase in total peripheral resistance, while mechanisms that induce vasodilation provoke a decrease in total peripheral resistance.    
  • Blood pressure: This term refers to the strength applied by the blood against the vessel walls as it flows.  This pressure is determined by the bombed blood strength and the volume as well as by the vessel size and flexibility. Blood pressure changes continuously according to the activity, temperature, diet, emotional state, among others.    
  • Salt ingestion causes an increase in plasmatic osmolarity, stimulates thirst, and hence, water ingestion. Sodium retains water, expanding the blood volume and causing an increase in vessel pressure.
  • The antidiuretic hormone, also known as vasopressin hormone, is released by changes in serum osmolarity or blood volume. Its function is to keep homeostasis and make kidneys conserve or keep water by concentrating urine and by reducing its volume. By these actions, the antidiuretic hormone stimulates water reabsorption, according to the organism´s needs.
  • Kidneys control blood pressure in many ways. If the pressure is elevated, kidneys produce the loss of salt and water, normalizing arterial pressure. But if pressure is low, kidneys conserve water.          
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