Exam 1: Cytology and Basic Chemistry

Cytology is the study of

• tissues

• cells

• organs

• Mr. Johnson

Tags

NGSS.HS-LS1-4

what are the 3 basic parts of a human cell

• mitochondria, ribosomes, nucleus

• reticularis, follicles, and plasma membrane

• plasma membrane, cytoplasm, and nucleus

• nucleus, lysosomes, and desmosomes

Tags

NGSS.MS-LS1-2

what are the main functions of the cell membrane

• acts as a barrier between ICF and ECF

• Is a contact surface

• controls what enters and exits cell

• is the site of many chemical reactions

what does the cell membrane consist of

• phospholipid bilayer

• membrane proteins

• lysosomes

• Mr. Scoggins

how are integral proteins attached to the membrane

• they are loosely attached

• they are firmly embedded

• they aren't attached at all, they float

• there are no integral proteins on a membrane

how are peripheral proteins attached

• they are loosely attached either inside or outside the cell

• they are only attached inside the cell

• they are transmembrane and are firmly embedded

• they aren't attached, they float

how is a tight junction formed

• linker proteins interlock and form a "zipper"

• integral proteins on adjacent cells fuse together

• transmembrane proteins come together to form a tunnel

what is a gap junction

• integral proteins the fuse

• linker proteins that interlock like a zipper

• transmembrane proteins that form tunnels

what are gap junctions used for

• they spread ions, simple sugars, or other small molecules

• they are used for disaccharides

• they are used to spread phospholipids

• they are used to spread cells

plasma membranes are

• permeable

• selectively permeable

• big

• thicccc