RBC

Q.

The structural and functional unit of kidney is

1. neuron

2. nephron

3. Bowmans capsule

4. glomerulus

Q. Adult human RBCs are enucleate. Which of the following statement(s) is/are most appropriate explanation for this feature ?
(a) They do not need to reproduce
(b) They are somatic cells
(c) They do not metabolize
(d) All their internal space is available for oxygen transport

1. only (d)
2. only (a)
3. (a), (c) and (d)
4. (b) and (c)

Q. Explain the transport of $O_2$ and $C{O}_2$ between alveoli and tissue with a diagram.

Explain the transport of $O_2$ between alveoli and tissue with a diagram.

Explain the transport of $C{O}_2$ between alveoli and tissue with a diagram.

Q. Select the incorrectly matched pair from following:

1. Chondrocytes - Smooth muscle cells
2. Neurons - Nerve cells
3. Fibroblast - Areolar tissue
4. Osteocytes - Bone cells

Q. __________ are the most abundant blood cells in human blood.

1. B cells
2. Platelets
3. White blood cells
4. Red blood cells

Q. Prothrombin $\stackrel{a}{\to }$ Thrombin Fibrinogen $\stackrel{b}{\to }$ Fibrin Recognise a and b

1. a-thrombokinase, b-thrombinase
2. a-fibrin, b-thrombokinase
3. a-thrombokinase, b-thrombin
4. a-thrombinase, b-thrombokinase

Q.

Write five examples of non-nucleated cells.

Q. Match the following columns and select the correct option:

Column - I	Column - II
(a)	Pneumotaxic centre	(i)	Alveoli
(b)	$O_2$dissociation curve	(ii)	Pons region of brain
(c)	Carbonic anhydrase	(iii)	Haemoglobin
(d)	Primary site of exchange of gases	(iv)	R.B.C.

1. $\left(a\right)-\left(i\right),\left(b\right)-\left(iii\right),\left(c\right)-\left(ii\right),\left(d\right)-\left(iv\right)$
2. $\left(a\right)-\left(ii\right),\left(b\right)-\left(iii\right),\left(c\right)-\left(iv\right),\left(d\right)-\left(i\right)$
3. $\left(a\right)-\left(iii\right),\left(b\right)-\left(ii\right),\left(c\right)-\left(iv\right),\left(d\right)-\left(i\right)$
4. $\left(a\right)-\left(iv\right),\left(b\right)-\left(i\right),\left(c\right)-\left(iii\right),\left(d\right)-\left(ii\right)$

Q.

Describe the location of kidney in human body.

Q.

Haematopoiesis is the process of

1. Oxygenation of blood in Lungs

2. Destruction of RBCs in spleen

3. Production and maturation of blood cells in bone marrow

4. None of the above

Q. Write the chemical name of the following vitamins.
(a) Vitamin ${\text{B}}_2$

Q. Explain the mass flow hypothesis of transport in phloem.

Q. Golden Rice is a variety rich in

1. 𝞫-Carotene and ferritin
2. Vitamin C
3. Biotin
4. Lysine

Q.

Which statement about $C{O}_2$ is incorrect?

1. Its concentration in the blood is decreased by hyperventilation

2. Its accumulation in the blood is associated with a decrease in pH

3. More CO­₂ dissolves in the blood plasma than is carried in the RBCs

4. CO­₂ concentrations are greater in venous blood than arterial blood

Q. Which two of the following changes (i - iv) usually tend to occur in the plain dwellers when they move to high altitudes (3, 500 m or more)?
(i) Increase in red blood cell size
(ii) Increase in red blood cell production
(iii) Increase breathing rate
(iv) Increase in thrombocyte count.
Changes occurring are

1. (ii) and (iii)
2. (iii) and (iv)
3. (i) and (iv)
4. (i) and (ii)

Q. Which of the following in mammals does not play a central role in calcium balance in the human body?

1. Thymosin
2. Vitamin D
3. Parathyroid hormone
4. Thyrocalcitonin

Q. Which of the following statements is true about RBCs in humans?

1. They carry about 20-25 per cent of $C{O}_2$
2. They carry about 99.5 per cent of $O_2$
3. They transport about 80 per cent oxygen only and the rest 20 per cent of it is transported in dissolved state in blood plasma
4. They do not carry $C{O}_2$ at all

Q. Electron beam therapy is a kind of radiation therapy to treat

1. Kidney stones
2. Enlarged prostate gland
3. Gall bladder stones by breaking them
4. Certain types of cancer

Q.

What will happen to the body of an adult man if spleen is removed?

1. Filtration of dead RBCs will not be there

2. WBC production will be lowered

3. RBC production will be lowered

4. Antibody production will be less

Q.

*Name the microscopic coiled tubes in kidneys

Q. What is the role of gall bladder? What may happen if it stops functioning or is removed?

Q.

Fill in the blanks.

(iii) Monocytes have ________ shaped nucleus.

Q. State whether the following are true or false.​

Lymph contains RBC. ​

Q.

What is pancreas? Mention the major secretions of pancreas that are helpful in digestion.

Q.

Haematopoiesis is the process of

1. Oxygenation of blood in Lungs

2. Destruction of RBCs in spleen

3. Production and maturation of blood cells in bone marrow

4. None of the above

Q. The reason behind why mature human RBCs cannot divide or metabolise is

1. because they carry oxygen
2. because they are present in blood stream
3. because they lack nucleus
4. because they are biconcave in shape

Q. Given below is a highly simplified diagram of the human kidney cut open longitudinally. Answer the questions that follow:
a) Define excretion.

Q.

Name the structural and functional unit of kidney.

Q. The rarest leucocyte of human blood is

1. Basophil
2. Monocyte
3. Neutrophil
4. Eosinophil

Q. How can plants be grown under limited water supply without compromising on metabolic activities?