Q. No.In humans, blood passes from the post-caval to the diastolic right atrium of heart due to
1. Pressure difference between the post-caval and atrium
2. Pushing open of the venous valves
3. Suction pull
4. Stimulation of the sinoatrial node
1. Pressure difference between the post-caval and atrium
2. Pushing open of the venous valves
3. Suction pull
4. Stimulation of the sinoatrial node
Given below are four statements (a-d) regarding human blood circulatory system:
| (a) | Arteries are thick-walled and have narrow lumen as compared to veins. |
| (b) | Angina is acute chest pain when the blood circulation to the brain is reduced. |
| (c) | Persons with blood group AB can donate blood to any person with any blood group under the ABO system. |
| (d) | Calcium ions play a very important role in blood clotting. |
Which two of the above statements are correct?
| 1. (a) and (b) | 2. (b) and (c) |
| 3. (c) and (d) | 4. (a) and (d) |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
State of the heart when it is not pumping blood effectively to meet needs of body is called as:
| 1. Heart attack | 2. Heart block |
| 3. Cardiac arrest | 4. Heart failure |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
In the nodal tissue of the human heart, the highest conduction velocity is seen in:
| 1. Internodal pathway | 2. AV node |
| 3. AV bundle or Bundle of His | 4. Purkinje fibers |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
The functions of spleen include all of the following except:
1. Mechanical filtration of red blood cells.
2. Production of all types of blood cells during fetal life
3. Storage of red blood cells, lymphocytes and other formed elements.
4. Suppression of cell mediated and humoral immune responses
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
The activities of the human heart can be regulated through the autonomic nervous system by a special neural center located in:
| 1. | Medulla oblongata | 2. | Hypothalamus |
| 3. | Mid brain | 4. | Cerebrum |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Select the option having all the correct characteristics :
| Structure | Percentage | Function | |
| 1. |  |
0.3-0.5 | Phagocytic |
| 2. |  |
0.5-1.0 | Secrete histamine |
| 3. |  |
30-40 | Defense against parasites |
| 4. |  |
30-40 | Allergic reactions |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Identify the incorrectly matched pair:
|
1. |
Most abundant plasma protein |
Albumin |
|
2. |
Most abundant agranulocyte in blood |
Neutrophil |
|
3. |
Most abundant circulating antibody |
IgG |
|
4. |
Second most abundant formed elements in blood |
Thrombocytes |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
A person with which of the following blood groups can receive blood from a donor of only his/her own blood group?
| 1. O | 2. A |
| 3. B | 4. AB |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
| Assertion (A): | When the ventricles are in systole, the atria are in diastole. |
| Reason (R): | All four chambers of the heart can never be in systole or diastole together. |
In the light of the above statements choose the correct answer from the options given below:
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
© 2024 GoodEd Technologies Pvt. Ltd.