cardiovascular system
How many valve(s) found in the heart?
4
platelets as coagulation neutrophil as phagocytosis erythrocyte as transport lymphocytes as antibodies production bone marrow as blood cells production
all true
highest blood pressure is found in venule aorta artery vein
b
At the instant following the second heart sound, which heart valves are open? (Choice A)AAll valves are closed (Choice B)BSemilunar valves only (Choice C)CBoth atrioventricular valves and semilunar valves (Choice D)DAtrioventricular valves only
c
What effect does adrenaline have on the heart? It increases the heart rate only It increases the stroke volume only It increases the heart rate and stroke volume
c
heart sound is produced due to closure of tricuspid and bicuspid valves closure of semilunar valves entry of blood into the auricles rushing blood through valves none of the above
a b d
The muscular layer of the heart that is responsible for pumping is the: Endocardium Epicardium myocardium
c
One complete heartbeat ECG systole diastole cardiac cycle
d
A wall of tissue that separates the 4 chambers of the heart Pulmonary Circulation Valves Atria Ventricles Septum
e
Small vessels that carry blood from arterioles and to small vessels called venules which then empty into veins Arterioles Arteries Veins Venules Capillaries
e
The umbilical cord has a vein that carries: Nutrients and oxygen rich blood to the baby Wastes from the mom Carbon dioxide and metabolic materials to the baby
a
The vessel layer that is fibrous and responsible for support is the: Tunica externa Tunica intima Tunica media
a
What is the correct path through the circulatory system which describes the passage of blood originating in the left leg? A Vena cava → right atrium → right ventricle → lungs → left atrium → left ventricle → aorta (Choice B) B Vena cava → left atrium → left ventricle → lungs → right atrium → right ventricle → aorta (Choice C) C Vena cava → left atrium → right atrium → lungs → left ventricle → right ventricle → aorta (Choice D) D Vena cava → right atrium → left atrium → lungs → right ventricle → left ventricle → aorta
a
Which type of blood vessel has a 'pulse'? Artery Vein Capillary
a
not function of blood produce acid control temperature control balance of chdmical provide antibodies
a
nature of artery tunica intima is smooth and minimize friction artery wall give strength, elasticity and resilience artery further away from heart few muscle fibre and more elastic fibre largest aorta has the highest pressure made of two layered wall
a b d
vein venous pressure is low has large lumen need to have thick wall has semilunar valve blood toward heart is done by squeezing muscle only
a b d
all the followings apply to bicuspid valve also called mitral valve it is a kind of semilunar valve found on left side of heart prevents blood from backing left atrium prevents blood from backing right atrium
a c d
capillaries provide direct access to nearly every cell have greater pressure near venular end are absent in cornea and cartilage have muscular wall has same size as RBC diameter
a c e
pulmonary circulation= rt ven-> p.a-> lungs-> p.v -> Lt atrium systemic circulation= vena cava-> r.a -> r.v ->lungs-> l.a ->l.v ->aorta -> body systemic circulation = flow of bld from l.v to the r.a pulmonary circulation = r.v ->p.v ->lunhd -> p.a -> l.a conduction pathway of heart = SAnode -> AV node-> bundle of His -> purkinjee fibres
a c e
A surgeon opens the thoracic cavity and finds a membrane covering the mediastinum. This membrane is called the: Visceral pericardium Parietal pericardium Visceral peritoneum Parietal peritoneum
b
How can the circulatory system promote heat retention/conservation, such as on a cold day? Choose 1 answer:Choose 1 answer: (Choice A)AVasodilation (Choice B)BVasoconstriction (Choice C)CDecreasing tunica media contraction (Choice D)DIncreasing capillary surface area
b
The softer "dupp" sound of the heart is from: The closing of the atrioventricular valve The closing of the semilunar valve The opening of the semilunar valve
b
Which heart valves are NOT actively closed by the contraction of muscular structures? mitral semilunar tricuspid AV valves
b
Which valve prevents blood flowing back into the left atrium from the left ventricle? The semi-lunar valve The bicuspid valve The tricuspid valve
b
Why is the mitral valve different from the other three valves of the heart? It only has 1 flap It only has 2 flaps It only has 3 flaps
b
types of mammalian circulation is/ are open system closed system single circuit incomplete double circuit complete double circuit
b e
What sort of circulatory system is the human circulatory system? An open circulatory system A single circulatory system A double circulatory system
c
Which chamber produces the highest pressure in the blood? Right atrium Left atrium Left ventricle
c
which bld vessels carry O2 bld? vena cava pulmonary artery pulmonary vein aorta coronary artery
c d e
where would you find valves? artery arteriole vein capillary lymph
c e
Blood cell that protect the body against infection Platelets Plasma Hemoglobin White Blood Cells Blood
d
In terms of being open or closed, what is the state of the mitral and tricuspid valves (left and right atrioventricular valves, respectively) at the end of the first heart sound? ABoth are open )BMitral is closed, tricuspid is open CMitral is open, tricuspid is closed DBoth are closed
d
What part of the intrinsic conduction system starts the heart beat? The atrioventricular node The Bundle of His The Perkinje fibers The sino-atrial node
d
What physical feature of large systemic arteries (resistance vessels) makes them relatively more responsive to changes in intracellular calcium concentrations? Absent tunica media Thick tunica intima Absent tunica intima Thick tunica media
d
Which chamber of the heart has the thickest wall? Right atrium Left atrium Right ventricle Left ventricle
d
