Histology Flashcards
What do capillary walls contain?
? endothelium
? basement membrane
? scattered contractile pericytes
How many layers of smooth muscle in medial layer of arteriole walls?
3 or less
What stains elastic fibres and sheets brown?
Van Gieson stain
What contracts faster: smooth or skeletal muscle cells?
Skeletal because fibres have their own nerve supply where smooth muscle fibres do not
Where are nuclei located in skeletal muscle cells?
Nuclei are at edge of muscle fibres
What produces collagen?
Fibroblasts
Fine movement muscles have more muscle spindles than coarse movement muscles - true or false?
True
What are the three types of muscle?
? smooth (visceral)
? skeletal (striated or voluntary)
? cardiac muscle
Some striated muscles are rich in haemoglobin. True or false?
False, some are rich in MYOGLOBIN
What does plasma contain?
Salts, nutrients, metabolites, antibodies and hormones
What are the three types of granule within neutrophils?
Primary granules - contain acid hydrolysed, antibacterial and digestive substances.
Secondary granules - specific glands secrete substances that mobilise inflammatory mediators.
Tertiary granules - secrete gelatinases and promote cell adhesion.
Name the three types of cartilage and give an example of where you would find each.
1) hyaline - trachea, larynx
2) elastic - epiglottis
3) fibrous - intervertebral discs
What do endothelial cells do?
Secrete a variety of vasoactive substances
? actively transport molecules across their cytoplasm
? influence tone of surrounding muscle
? modulate blood coagulation
What are type 1 muscle fibres?
= Slow twitch muscle fibres, oxidative energy supply, & fatigue resistant.
Found in highest proportions in postural muscles.
What type of muscle fibres are fast twitch and use a mix of oxidative and glycolytic processes to obtain energy and are therefore moderately fatigue resistant?
Type 2A
