Human Blood Questions
MS1
1. What does the blood do for the body? Why is the blood so important?
A:
- relives heat, water, oxygen, hormones, nutrients and antibodies
-removes harmful wastes
-homeostasis; regulates environments surrounding body cells (controls activities
of living cells)
2. What different parts make up blood?
A:
-platelets (thrombocytes)
-red corpuscles (RBC’s)
-White corpuscles (WBC’s)
-polymorphonuclear leucocyte
-lymphocyte
-plasma
3. What colour is the plasma on MS1? How does that compare to the colour of
plasma in our bodies?
A:
-stained pink on MS1
-pale yellow in our bodies
4. What proteins does the plasma have? What do they do?
A:
-globulins: help develop immunity against disease
-abbumins: help maintain blood pressure
-fibrinogen: helps clot blood
MS2
1. Which organs remove defective red blood cells? How many are replaced per
second?
A:
-spleen and liver
-1mil/sec
*sketch an RBC
A:
2. What is the effect of BICONCAVITY on the RBC?
-gives more surface to the cell membrane
-can take in and give off molecules rapidly
A:
3. What would happen if RBC’s did not contain Hb?
-will not be able to carry as much oxygen
-blood would be more syrupy and would not flow as easily through capillaries
4. Look back at RBC’s in MS1. What evidence do you see that they have a biconcave
shape?
A:
-dark around edges: cells are thicker
-light in middle: cells are thinner
MS3
1. What are eosinophilic leukocytes? How common are they?
A:
-increase in number during allergic reactions
-have anti-histamine activities
-2-5%
A:
A:
2. What are basophilic leukocytes? How common are they?
-reduce swellings at infections, attracting others to the battle against disease
-1%
3. What are monocytes? How common are they?
-last to arrive at infection
-most ferocious eaters of bacterial foreign matter, dying leukocytes
-3-8%
4. What are lymphocytes? How common are they?
-circulate everywhere
-in lymph nodes, they change into plasmocytes and manufacture anti-bodies
that fight disease
-develop immunity against infections
-20-25%
A:
MS4
1. What are pseudopods?
A:
-extensions of leukocytes, which engulf and destroy bacteria
MS5
1. Explain why the cells have become agglutinated on the RHS of the slide
A:
-Type B RBC and Type A PLASMA (=anti-body B) clump
MS6
1. Which protein threads aid in the clotting process? Why would the clot be red?
How long does it take for normal blood to clot?
A:
-FIBRIN proteins threads
-red because of trapped RBC’s
-takes about 4 min
A:
2. What is hemophilia?
-inherited blood disease
-anti-clotting chemicals in blood prevent clotting
-victims may bleed to death from small injuries
MS7
1. Sketch a diagram of an abnormal sickle cell.
2. Why are sickle cells dangerous?
A:
-blood gets thicker, can’t pass through capillaries easily
-cells will break and you will become anemic
MS8
1. How do humans get infected with sleeping sickness? What is its scientific name?
A:
-trypanosoma protozoa
-injects the protozoa into human with its saliva
-tsetse fly sucks blood from animals
Circulatory System Questions
MS1
1. What are the 3 major parts of the circulatory system and their functions?
A:
(1) Blood: circulating fluid reaching every cells
(2)Blood Vessels: set of pipes in which the blood flows
(3)Heart: pumps to push blood through the pipes
2. Which corpuscle cell is the most common in human blood?
A:
-RBC: 25 trillion in the blood
A:
A:
3. What is the difference (s) between an RBC and a WBC?
-no nucleus
-contains H6 for oxygen transport
-eat bacteria
4. What is the major component of plasma?
-90% water
MS2
1. What important function do WBC’s carry out?
A:
-destroy foreign bacteria / invaders
A:
2. What is the width of the WBC in µm? (1in= 2.54cm; 1µm= 1000µm)
3. What is the width of the smallest bacteria (B) in µm? (1in= 2.54cm; 1µm=
1000µm)
MS3
1. What is the difference between an artery and a vein?
A:
-artery: blood flows AWAY from the heart
-vein: blood flows TOWARDS the heart
2. Which has a thicker muscle layer, an artery or a vein? Explain why in terms of its
function.
A:
-artery: it must withstand / hold blood pumped at a higher pressure
MS4
1. What is another name for a small artery?
A:
-arteriole
2. What happens in the capillaries?
A:
-food, water, oxygen diffuse our of the blood to the tissues
-wastes from tissues enter blood = carried off
-connects arteries to veins = return to heart
MS5
1. What is a lymph?
A:
-a pool of plasma where cells live = tissue fluid
2. Are the valves in this slide open or closed?
A:
-closed
3. Sketch the diagram from the ms booklet on the general pathway of circulation.
MS6
1. Why is the human heart called a 4-chambered heart?
A:
-2 receiving chambers (AURICLES)
-2 pumping chambers (VENTRICLES)
A:
2. Why can’t blood pass from left heart to right?
-there is a solid mass of cardiac tissue, separating 2 sides
MS7
1. What is the arrow pointing to and what is its function?
A:
-points to a tiny artery
-this is a small branch of coronary artery
-nourishes heart
2. What do you think happens if an important branch of coronary artery were
blocked?
A:
-various
-heart dies slowly
MS8
1. What is the name of the largest artery in the body?
A:
-aorta
2. What characteristics does a ventricle and artery have that prevents blood from
falling back into it?
A:
-they have flaps which open when blood’s being pumped to aorta / lungs
-they close / fall back to stop blood from flowing backwards