Histology theory part 2 Flashcards
How see the difference between artries and veins
Veins have bigger lumes, but smaller tunica media
Tunica intimia is made of
Endothelium
Tunica media is made of
Smooth muscle and elastic fibers
Tunica adventitia is made of
Loose connective tissue
What does not have IEL
Capillary, past capillary venule, venule, small vein
What has subendothelium
Small artries and bigger, and medium sized veins and bigger
external elastic lamina
Outside smooth muscle in tunica media in muscular arteries
Small blood vessels supplying bigg vessels
vasa vaserum
Precapillary sphincter is …
A precapillary sphincter is a band of smooth muscle that adjusts blood flow into capillaries
Three types of capillaries
Sinusoid, fenestrated, continuous
Cellular composition of blood
RBC, WBC, platelets (thrombrocytes)
Plasma is composed of
Water, electrolytes, proteins, transporter proteins
Serum lacks … , and makes it different from plasma
fibrinogen
From more to less, WBC
(never let monkeys eat banans) Neutrophil, Lymphocyte, Monocyte, Eosinophil, Basophil
Most abundent on a blood smear
erythrocytes (RBC)
WBC’s two categories, what in each
Granulocytes (neu, eos, bas), agranulocytes (mono, leu)
Function of neurophil
Phagocytose forign bodies (non specific immune system)
Function of eosinophil
Allergic reaction, (phagocytosis)
Function of basophil
Allergic reaction, hypersensitive
Function of monocyte
Organize immuneresponse
Undercategories of lymphocytes and function
B- (make antibodies) and T-cells (kill virus)
Types of striated muscle
Skeletal muscle, visceral muscle (tung eg), cardiac muscle
Levels or organization skeletal and viseral muscle from smallest to biggest
Myofibrils are made up of repeating units of sarcomeres
Bands, lines and discs of sarcomere
+ H zone
A-band stands for
Anisotropic
I-band stands for
Isotropic
Proteins keeping myosin from actin filaments
Troponin (balls) and thropomyosin (long fibers)
(contraction) Action potential from neuron …
action potential goes from neuron to sarcolemma, through t tubules, connected to sacroplasmic reticulum and stored Ca+ is released, attaches to troponin which lifts tropomyosin, with help of ATP the sacromere can contract
Maintains the structure of the myofibril
Nebulin
Links mitochondria, sacrolemma and Z-disk together
Desmin
Binding site for actin (myofibril)
fascia adherens
Joining cells together (myofibrils)
Desmosomes
Allowing action potential to spread between cardiac cells
Nexus
Smooth muscle does not contain –
Troponin
Hematopoietic stem cell, type?
Multipotent (produce in closely related familiy)
