Which of the following is true for hepatic portal system?
(a) It is the vascular connection between the digestive
tract and liver.
(b) The hepatic portal vein carries blood from intestine
to the liver before it is delivered to the systemic
ciruclation.
(c) The flow of deoxygenated blood from digestive
organs to the liver occurs before returning to the
systemic circulation
(d) More than one option is true
Capillaries:
(a) Have multilayered wall composed of simple
squamous epithelium or endothelim.
(b) Permit more rapid exchange of materials between
the blood and tissue than any other type of blood
vessel
(c) Are the narrowest blood vessels.
(d) Are related to more than one option.
Identify A,B,C and D
Arteries Vains
Tunica media is thick A
B The walls are thin
C Have valves
Blood flow is fast D
Options |
A |
B |
C |
D |
(a) |
Tunica media is thin |
The walls are thin |
Valves present |
Blood flow equally fast |
(b) |
Tunica media is thin |
The walls are thick |
Valves absent |
Blood flow relatively slow |
(c) |
Tunica media thick |
The walls are thick |
Valves absent |
Blood flow relatively slow |
(d) |
Tunica media equally thick |
The walls are thick |
Valves present |
Blood flow equally fast |
Human heart is :
(a) Myogenic
(b) Regulated mostly extrinsically
(c) Neurogenic
(d) Not at all under the controll of autonomic nervous
system
Human heart is myogenic since:
(a) It is autoregulated by specialised heart muscles
(nodal tissue)
(b) It is regulated by CNS
(c) It is regulated by ANS
(d) It generates electrical impulses by extrinsic factures
Adrenal medullary hormones:
(a) Like epinephrine and nor-adrenaline are secreted
in response to stress due to emergency
(b) Can increase the heart beat
(c) Can increase cardiac output
(d) Are related to all of the above
Read the following statements :
(i) Adrenaline has no role in increasing the cardiac
output
(ii) A special neural centre in the medulla oblongata
can moderate the cardiac function through ANS
(iii) Neural signals throught he sympathetic nerves can
increase the rate of heart beat
(iv) Parasympathetic neural signals decrease the rate
of heart beat
(v) Parasympathetic nerve endings release
acetylcholine that increases the cardia output
Which of the above statements are correct?
(a) (i), (v)
(b) (ii), (iv), (v)
(c) (ii), (iii), (iv)
(d) (i), (ii)
Which of the following is incorrect?
(a) The blood pressure of 140/90 or above relates to
hypertension
(b) High blood pressure leads to heart diseases
(c) High blood pressure affects vital organs like brain
and kidney
(d) The blood pressure of 120/80 indicates low blood
pressure
Match the column:
Column-I Column-II
A. Angina pectoris (i) Heart does not pump blood
effectively enough to meet
the needs of body
B. Heart attack (ii) Acute chest pain when no
enough oxygen reaches
heart
C. Heart failure (iii) Damage of heart muscles
suddenly by inadequate
blood supply
D. Cardiac arrest (iv) Heart stops beating
(a) A = (i), B = (iv), C = (iii), D = (ii)
(b) A = (ii), B = (iii), C = (i), D = (iv)
(c) A = (ii), B = (iv), C = (i), D = (iii)
(d) A = (i), B = (iii), C = (ii), D = (iv)
Which of the following is incorrect?
(a) The narrowing of lumen of artery due to deposition
of fats is called atherosclerosis
(b) Artificial pacemaker is necessary when a person
is suffering from irregularity of heart beat
(c) Isovolumetric systole is the duration between
closure of AV valve and opening of semilunar valve
(d) High levels of sodium ions increase heart rate whereas
high levels of calcium ions decrease heart rate
Which of the following develops the greatest pressure
in the mammalian aorta?
(a) Systole of left atrium
(b) Diastole of right ventricle
(c) Systole of left ventricle
(d) Diastole of right atrium
Which of the following pairs of mammalian blood vessels
has blood that is the least similar in its gas content?
(a) Pulmonary vein and jugular vein
(b) Pulmonary artery and vena cava
(c) Pulmonary vein and aorta
(d) Inferior vena cava and superior vena cava
After several weeks of exercise, an athelete’s resting
heart rate typically lower than before because:
(a) The body needs less oxygen than before
(b) The body temperature has increased
(c) The stroke volume has increased
(d) The cardia output has decreased
The blood pressure is lowest in:
(a) Vena cavae
(b) Aorta
(c) Arteries
(d) Capillaries
The blood vessels with the slowest velocity of blood
flow is:
(a) Capillaries
(b) Arterioles
(c) Arteries
(d) Veins
People living at sea level have around 5 million RBCs
per cubic millimeter of their blood whereas those living
at an altitude to 5400 metres have around 8 million. This
is because at high altitude
(a) People eat more nutritive food, therefore, more RBCs
are formed.
(b) People get pollution-free air to breathe and more
oxygen is available
(c) Atmospheric O2
level is less and hence more RBCs
are needed to absorb the required amount of O2
to
survive.
(d) There is more UV radiation which enhance RBC
production.
Coronary heart disease is due to
(a) Streptococci bacteria
(b) Inflammation of pericardium
(c) Weakening of the heart valves
(d) Insufficient blood supply to the heart muscles
In the resting person, saturation of haemoglobin as blood
leaves the tissue capallaries is approximately
(a) 75%
(b) 40%
(c) 3%
(d) 46%
If the heart sound recording and ECG recordings are
superimposed then the first heart sound would occur
(a) At the P wave
(b) Just after the P wave
(c) Just before the QRS complex
(d) Just after the QRS complex
Which among the followings incorrect during each cardiac cycle?
(a) The volume of blood pumped out by the Rt and Lt
ventricles is same
(b) The volume of blood pumped out by the Rt and Lt
ventricles is different
(c) The volume of blood received by each atrium is
different
(d) The volume of blood received by the aorta and
pulmonary artery is different
Cardiac activity could be moderated by the autonomous
neural system. Tick the correct anwer
(a) The parasympathetic system stimulates heart rate
and stroke volume
(b) The sympathetic system stimulates heart rate and
stroke volume
(c) The parasympathetic system decreases the heart
rate but increase stroke volume
(d) The sympathetic system decreases the heart rate
but increase stroke volume
Match the terms given under column ‘A’ with their functions given under Column ‘B’ and select the answer from
the options given below
Column-A Column-B
A. Lymphatic system (i) Carries oxygenated blood
B. Pulmonary vein (ii) Immune response
C. Thrombocytes (iii) To drain back the tissue
fluid to the circulatory
system
D. Lymphocytes (iv) Coagulation of blood
Option
(a) A-ii, B-i, C-iii, D-iv
(b) A-iii, B-i, C-iv, D-ii
(c) A-iii, B-i, C-ii, D-iv
(d) A-iii, B-ii, C-i, D-iv
Which one of the following statements is correct
regarding blood pressure?
(a) 130/90 mm Hg is considered high and requires
treatment
(b) 100/55 mm Hg is considered ideal blood pressure
(c) 105/50 mm Hg makes one very active
(d) 190/110 mm Hg may harm vital organs like brain
and kidney
Which statement is incorrect?
(a) Mast cells and basophils secrete histamine and
heparin
(b) Mast cells are long lived, basophils are short lived
(c) Mast cells are smaller than basophils with a
bilobednucleus
(d) Mast cells are relatively sessile, basophils are
mobile
Which two of the following changes (a-d) usually tend to
occur in the plain dwellers when they move to high altitudes (3500 m or more)
(1) Increase in RBC size
(2) Increase in RBC production
(3) Increased breath rate
(d) Increase in thrombocye count
Change occuring are
(a) 1 and 2
(b) 2 and 3
(c) 3 and 4
(d) 1 and 4
The deposition of lipids on the wall lining the lumen of
large and medium sized arteries is referred to as
(a) Deep vein thrombosis
(b) Stokes- Adams syndrome
(c) Osteoporosis
(d) Atherosclerosis
Which one is correct?
(a) Blood= plasma + RBC+WBC+blood platelets
(b) Plasma = blood - lymphocytes
(c) Neuron = cyton + dendrite + axon + synapse
(d) Lymph = plasma + RBC + WBC
The first heart sound is produced when
(a) Semilunar valve shuts
(b) Interventricular pressure decrease
(c) Diastole begins
(d) Bicuspid and tricuspid valves closed quickly
Maximum surface area of circulatory system is seen in
(a) Heart
(b) Capillaries
(c) Arterioles
(d) Veins