NEET Test 52

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NEET Test 52

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Weekly Quiz Competition

Question 1
4 / -1

Excess of KI reacts with CuSO₄ solution and then Na₂S₂O₃ solution is added to it. Which of the statements is incorrect for this reaction?

A
CuI₂ is formed

B
Na₂S₂O₃ is oxidized

C
CuI is formed

D
None of these

Solution

Overall following reaction will take place:
CuSO₄ + Na₂S₂O₃ + KI → CuI + K₂SO₄ + Na₂S₄O₆ + NaI
Question 2
4 / -1

What kind of neuron are found in retina of eye?

A
Multipolar

B
Unipolar

C
Bipolar

D
Pseudounipolar
Solution
- Neurons are divided into three major types based on the number of axon and dendrites present in them, i.e., unipolar, bipolar, multipolar and pseudounipolar neurons.
- Bipolar neurons posses two poles hence, they are known as bipolar.
- They have cell body with one axon and one dendrite.
- Axon transmits the nerve impulse away from the cell body whereas dendrites transmit the nerve impulse towards the cell body.
- Multipolar neuron possesses cell body with one axon and two or more dendrites.
- Unipolar neuron possesses cell body with one axon only.
- Pseudounipolar nerve cells, with the cell body on a side-branch of the main axon (e.g., cells of dorsal root ganglion).
Question 3
4 / -1

The outermost sheath that surrounds the muscle is

A
Fasciculi

B
Perimysium

C
Epimysium

D
Endomysium
Solution
- The sheath of connective tissues that surrounds the muscle is known as Epimysium.
- A muscle consists of many muscle fibers that are arranged in a bundle called fasciculi.
- A sheath of connective tissues that surround each fasciculus is known as perimysium.
- Inside fasciculus muscle fibers are parallel to each other and surrounded by a connective tissue calledendomysium.
Question 4
4 / -1

Oxyhaemoglobin dissociates near tissues due to

A
Increase in acidity and decrease in pH

B
Increase in acidity and increase in temperature

C
Increase in acidity and increase in pH

D
Both A and B
Solution
- O₂ binds with Hb at the lungs surface and gets dissociated at the tissues.
- Under the high partial pressure, oxygen easily binds with Hb in the pulmonary blood capillaries.
- Oxyhaemoglobin dissociates near tissues due to an increase in acidity and decrease in pH.
- It can also be caused due to high temperature.
- In a normal person, the haemoglobin level is about 15 g per 100 ml.
- The capacity of 1g of haemoglobin to combine with O₂ is 1.34 ml.