Tag: evs

Questions Related to evs

Ventricular diastole takes place due to activity of

evs transportation in living organisms circulatory system and organs basics of blood and heart circulatory system

  1. Tissue

  2. Organ

  3. Organ system

  4. Cell organelle.

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Correct Option: A

Iter (Aqueduct of Sylvius) is found between

evs transportation in living organisms circulatory system and organs basics of blood and heart circulatory system

  1. Third and fourth ventricles

  2. Two lateral ventricles

  3. Lateral ventricles and third ventricle

  4. Rhinocoel and lateral ventricles

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Correct Option: A

Choose the correct answer from the alternatives given.
The heart sound dup is produced when:

evs transportation in living organisms circulatory system and organs basics of blood and heart circulatory system

  1. mitral valve is opened

  2. mitral valve is closed

  3. tricuspid valve is opened

  4. semilunar valve at the base of aorta gets closed

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Correct Option: D
Explanation:

In a healthy individual, there are two normal heart sounds called lub and dub. Lub is the first heart sound. It is associated with the closure of the tricuspid and bicuspid valves at the beginning of systole. The second heart sound dub is associated with the closure of the semilunar valves at the beginning of diastole.

So, the correct option is 'semilunar valve at the base of aorta gets closed'.

Choose the correct answer from the alternatives given.
Blood enters the heart because muscles of:

evs transportation in living organisms circulatory system and organs basics of blood and heart circulatory system

  1. atria relax

  2. ventricles relax

  3. atria contract

  4. ventricles contract

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Correct Option: A
Explanation:

Human blood passes from the inferior vena cava into the diastolic right atrium of the heart because of a pressure differential between the atrium and the vena cava. This negative pressure gradient is created by atrial diastole and pulls blood to the atrium which is then pumped to the ventricles by contraction.

So, the correct answer is atria relax.

Choose the correct answer from the alternatives given.
In normal heart action:

evs transportation in living organisms circulatory system and organs basics of blood and heart circulatory system

  1. right atrium and ventricle contract, followed by the contraction of the left atrium and ventricle

  2. two atria contract together, then the two ventricles contract together

  3. right atrium and left ventricle contract, followed by the contraction of the left atrium and right ventricle

  4. all four chambers of the heart contract and then relax simultaneously

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Correct Option: B
Explanation:

Due to one complete cardiac cycle, the two atria contract during the first 0.1 seconds, followed by ventricular systole for 0.3 seconds and finally joint diastole for 0.4 seconds. 

So, the correct option is 'Two atria contract together, then the two ventricles contract together'.

The poisonous teeth of snake is called as

evs a snake charmer's story snakes snakes and snake charmers uses of animals

  1. Fang

  2. Poisonous saliva

  3. Poisonous tongue

  4. None of the above

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Correct Option: A
Explanation:

Fangs are modified teeth present in the upper jaw. They store and inject the venom when the snake bites.

The snake smell by using

evs a snake charmer's story snakes snakes and snake charmers uses of animals

  1. Skin

  2. Tongue

  3. Scales

  4. None of the above

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Correct Option: B
Explanation:

Snakes have vomeronasal organs on the top of their mouths that recognise smells and tongue helps them do so.

The skin or scales do not have any such receptors hence they do not contribute in detection of smell.
So the correct answer is 'Tongue'. 

Which of the following is the shortest snake?

evs a snake charmer's story snakes snakes and snake charmers uses of animals

  1. Python

  2. Thread snake

  3. Cobra

  4. None of the above

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Correct Option: B
Explanation:

Python and Cobra can range about several meters in length.

While the Thread snake is only 10 cms in length.
So the correct answer is 'Thread snake'.

The poison of the snake is known as

evs a snake charmer's story snakes snakes and snake charmers uses of animals

  1. Venom

  2. Saliva

  3. Blood

  4. None of the above

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Correct Option: A
Explanation:

Poison of snake is known as venom it is secreted by glands that produce saliva and stored in fangs. It helps the snake in hunting and protecting itself.

Snake releases venom by poisonous

evs a snake charmer's story snakes snakes and snake charmers uses of animals

  1. Saliva

  2. Tongue

  3. Fang

  4. Scales

Show answer
Correct Option: C
Explanation:

Snakes release venom that is stored in fangs. These are modified teeth that inject the venom into the prey or the predator to most of the times to kill it.