blood Flashcards
name the protein in blood that is responsible for transporting oxygen
haemoglobin
name one type of animal cell that does not have mitochondria
red blood cell
what word is used to describe the shape of the two faces of these cells
biconcave
what feature of red blood cells allows them to pass through the narrow capillaries
flexible
human red blood cells live for about 120 days, give a reason for this
no nucleus
give a location in the body where red blood cells are produced ed
red bone marrow
give a location in the body where red blood cells are usually broken down
liver
name the transport fluid in humans that does not contain red blood cells
lymph
name two substances that are transported in the blood
oxygen
proteins
give the location in the body where each of the substances (oxygen and protein) enters the blood
oxygen - lungs
protein - liver
state two ways in which red blood cells differ from white blood cells
white blood cells contain a nucleus, red blood cells dont contain a nucleus
red blood cells are biconcave, white blood cells are not biconcave
name a group of white blood cells,
monocytes
what is the role of antibodies in the body
to inactivate antigens
name any three types of T cell
helper, killer, suppressor
state a role of helper
activate killer cell
state a role of killer
attack infected cells
state a role of suppressor
stop immune responses
write a short note on the pulse
rate at which the heart beats
write a short note on blood pressure
force exerted by the blood against the walls of the blood vessels
comment on the effect of diet on the circulatory system
salt - high salt intake causes high blood pressure
comment on the effect of exercise on the circulatory system
excursive enlarges and strengthens the heart
give two ways in which red blood cell differs in structure or composition from a typical body cell
flexible, biconcave
what is the role of the SA node in the heart
pulses and causes the atria to contract
what is the role of the AV node in the heart
sends an impulse down special muscle fibres located in the septum
give the precise location for the SA node
wall of right atrium
give the precise location for the AV node
septum
