R4RIN – MCQs, Mock Tests | Zoology Zoology MCQS[NEET-2021 to 2022]--Cardiovascular System

This is the reason why the SA node acts as heart’s pacemaker

1. because it has a poor cholinergic innervations
2. because it has a rich sympathetic innervations
3. because of its capability of generating impulses
4. because it generates impulses at the highest rate

✅ Correct Answer: 4

This about second heart sound is incorrect

1. it is occasionally split
2. it is due to the closure of semilunar valves
3. indicates the commencement of diastole
4. it has a longer duration than the first sound

✅ Correct Answer: 4

The reason for the dicrotic notch on the aortic pressure curve is

1. contraction of aorta
2. closure of the aortic valve
3. rapid filling of the left ventricle
4. closure of the pulmonary valve

✅ Correct Answer: 2

Rise in the carotid sinus pressure leads to

1. reflex hypercapnia
2. reflex hyperpnea
3. reflex bradycardia
4. reflex tachycardia

✅ Correct Answer: 3

Peripheral vascular resistance can be best given by

1. pulse pressure as it corresponds to aortic compliance and stroke volume
2. mean arterial pressure as it supplies blood to organs
3. diastolic blood pressure as it leads to the decrease till mid-thoracic aorta
4. systolic pressure as it causes an increase in the descending aorta

✅ Correct Answer: 3

Duration of the absolute period, i.e., when the whole of heart is in diastole is

1. 0.2 seconds
2. 0.1 seconds
3. 0.4 seconds
4. 0.7 seconds

✅ Correct Answer: 1

This sets glomerular capillary pressure apart from other capillaries found in the body

1. Lower filtration pressure
2. Higher filtration pressure
3. Both (a) and (b)
4. none of these

✅ Correct Answer: 2

The ventricular muscles accepts impulses directly from

1. AV node
2. Bundle of His
3. Right and left bundle branches
4. Purkinje system

✅ Correct Answer: 4

This is the similarity between pulmonary and systemic circulation

1. total capacity
2. pulse pressure
3. peripheral vascular resistance
4. volume of the circulation per minute

✅ Correct Answer: 4

On the heart, the impact of adrenaline is all of these except that

1. it increases the uptake of oxygen by the heart
2. it increases the contraction force
3. it decreases the myocardial irritability
4. it increases the heart rate

✅ Correct Answer: 3

The branch of science deals with blood, blood forming tissues and its disorders is called___________

1. Hemopoiesis
2. Cardiovascular system
3. Plasmology
4. Hematology

✅ Correct Answer: 4

Out of the following, which one is NOT the physical characteristics of the blood?

1. Volume is 15-16 liters in an average sized adult male
2. Slightly alkaline pH
3. Constitute 20% of extracellular fluid
4. Provide 8% of total body mass

✅ Correct Answer: 1

Blood helps in transportation of the following components, except one, identify that?

1. Hormone
2. Oxygen
3. Heat
4. Lymph

✅ Correct Answer: 3

Which of the following is NOT a plasma protein?

1. Albumin
2. Globulin
3. Fibrinogen
4. Fibronectin

✅ Correct Answer: 4

What is a serum in the blood?

1. Liquid portion of blood
2. Plasma minus fibrinogen
3. Tissue fluid within lymphatic vessel
4. Formed elements and plasma

✅ Correct Answer: 2

Name the term which defines the amount of RBC present in the blood?

1. Hemoglobin
2. Hemopoiesis
3. Hematocrit
4. Myoglobin

✅ Correct Answer: 3

What is the site of hemopoiesis in an embryo?

1. Yolk sac
2. Liver
3. Thymus
4. Spleen

✅ Correct Answer: 1

Name the term given to abnormally low levels of white blood cells?

1. Leukocytosis
2. Leucopenia
3. Lymphocyte
4. Thrombopoietin

✅ Correct Answer: 2

Name the term given to the failure of bone marrow to produce RBC.

1. Aplastic anemia
2. Hemolytic anemia
3. Thalassemia
4. Hemorrhagic anemia

✅ Correct Answer: 1

Which type of anemia is responsible for the disease thalassemia?

1. Aplastic anemia
2. Hemolytic anemia
3. Hemorrhagic anemia
4. Iron deficiency anemia

✅ Correct Answer: 2

Which of the following membrane is responsible for the protection of the heart?

1. Epicardium
2. Endocardium
3. Myocardium
4. Pericardium

✅ Correct Answer: 4

ECG records electrical changes in which of the following layers of the heart, mark the correct option.

1. Epicardium
2. Pericardium
3. Endocardium
4. Myocardium

✅ Correct Answer: 4

The first branch of the human aorta is

1. Left subclavian artery
2. Brachiocephalic artery
3. Coronary artery
4. Left common carotid artery

✅ Correct Answer: 3

hepatic portal system originates from

1. Kidney
2. Diaphragm
3. Liver
4. Different parts of alimentary canal

✅ Correct Answer: 4

The function of spleen in adults is

1. Phagocytosis of old RBCs
2. Secretion of hormones
3. Formation of blood
4. Development of macrophage

✅ Correct Answer: 1

A person has blood group A means he / she has

1. A antigen in RBC
2. A antigen in plasma
3. B antigen in RBC
4. B antigen in plasma

✅ Correct Answer: 1

A person has blood group B means he / she has

1. A antigen in RBC
2. A antigen in plasma
3. B antigen in RBC
4. B antigen in plasma

✅ Correct Answer: 3

Extracellular fluids is rich in the following except

1. K+
2. HCO3-
3. Na+
4. Ca2+

✅ Correct Answer: 1

The velocity of flow in blood vessels is determined by

1. Caliber of blood vessel
2. Viscosity of blood
3. Pressure difference between two ends of blood vessels
4. All listed

✅ Correct Answer: 4

Left border of heart is formed by

1. Right ventricle
2. left Atrium
3. Left Atrium and left ventricle
4. Left ventricle

✅ Correct Answer: 3

Immunoglobulin which cross Placenta is

1. IgG
2. IgD
3. IgM
4. IgE

✅ Correct Answer: 1

For blood clotting fibrinogen is changed into fibrin with the help of

1. Thrombin
2. Platelets
3. Vitamin K
4. Antithrombin

✅ Correct Answer: 1

Blood clot inside a blood vessel is known as

1. Thrombus
2. Fibrinolysis
3. Thrombosis
4. Clot

✅ Correct Answer: 1

Thickest layer in the heart is

1. Endocardium
2. Myocardium
3. Epicardium
4. Epicardium

✅ Correct Answer: 2

Does not open in right Atrium

1. Middle cardiac vein
2. Anterior cardiac vein
3. Superior Vena cava
4. Coronary sinus

✅ Correct Answer: 1

Albumin is one of the plasma protein is synthesized in

1. Liver
2. Adrenal gland
3. Pancreas
4. Screen

✅ Correct Answer: 1

What is the function of blood platelets

1. Aid in coagulation of blood
2. Ingest bacteria
3. Carry haemoglobin
4. Transport co2

✅ Correct Answer: 1

uterine artery is a branch of

1. Common iliac artery
2. External iliac artery
3. Internal iliac artery
4. Descending aorta

✅ Correct Answer: 3

Bleeding can be due to all of the following causes except

1. Deficiency of white blood cells
2. Decrease in calcium
3. Thrombocytopenia
4. Deficiency of coagulation factor

✅ Correct Answer: 1

Hey Pathak portal system originates from

1. Diaphragm
2. Kidney
3. Liver
4. Different parts alimentary canal

✅ Correct Answer: 4

The blood in the mammalian heart pumped by the right ventricle pass out of orifice which is guarded by

1. Bicuspid valve
2. Tricuspid valve
3. Aortic arch
4. Pulmonary valve

✅ Correct Answer: 4

Peptic ulcer is most common to people of blood group

1. A
2. B
3. AB
4. O

✅ Correct Answer: 4

Splenic artery is a branch of

1. Superior mesenteric artery
2. Renal artery
3. Inferior mesenteric artery
4. Celiac trunk

✅ Correct Answer: 4

Universal Donor blood group of human beings is

1. B
2. AB
3. O
4. A

✅ Correct Answer: 3

Following substance are there buffering agents of human body except

1. Carbohydrate
2. Phosphate
3. Haemoglobin
4. Protein

✅ Correct Answer: 1

Blood grouping is important for

1. Diagnosis of blood disease
2. Blood transfusion
3. Detection of AIDS
4. Blood donation

✅ Correct Answer: 2

Aorta pierces the diaphragm at the level of

1. T8
2. T12
3. T10
4. C6

✅ Correct Answer: 2

A patient with high fever will most likely demonstrate the sign of

1. Decreased sweating
2. Increased pulse rate
3. Increased urinary output
4. Increased appetite

✅ Correct Answer: 2

Normally cardiac cycle takes … seconds to complete.

1. 0.1
2. 0.01
3. 0.8
4. 0.08

✅ Correct Answer: 3