TEST 5 - Mar 2020 Flashcards
How do wbc’s recognise invaders ? (1)
From the alien molecules on their cell surfaces
What are molecules that generate an immune response called? (1 )
Antigens
What are self molecules? (1 ）
Molecules that all your cells produce that are unique to you
What are the molecules that B cells make called , and how else could you describe them? (1 ）
Antibodies, guided missiles
What’s one way of describing how T cells attack antigens? (1 )
Cell to cell combat
What is the endocrine system made up of? (2)
Clusters of epithelial cells that secrete hormones (messenger molecules)
What is the endocrine system for, and how does it do what it does? (3)
? To maintain homeostasis - the messenger molecules make cells do things that keep conditions in the body relatively constant when things around are changing
Why don’t all cells respond to all hormones? (1 )
? To maintain homeostasis - the messenger molecules make cells do things that keep conditions in the body relatively constant when things around are changing
What happens when hormones reach the target tissue cells? (1 )
They change what those cells are doing
Which other system, besides the endocrine system, maintains homeostasis? (1)
Nervous system (esp ANS)
What are the differences between the way the nervous and endocrine systems work? (6)
neurotransmitters act very locally, and act very quickly for a very short time
hormones act over a wide area, work more slowly, and last for a long time
What 3 types of stimulus can make glands secrete hormones? (3)
Nervous signals, chem changes in blood, other hormones (3)
How is the secretion of most hormones controlled, and what is the one exception to this? (2)
Negative feedback, oxytosin
Which two major systems does the hypothalamus control? (2)
NS and endocrine system
