Ch 1 Flashcards
What’s an example of haploid cells?
Sex cells
What purpose do Histone proteins serve?
Protect naked DNA
Ribosomes attached to internal membranes is called
Rough endoplasmic reticulum
Where is the site of protein synthesis?
Endoplasmic reticulum
What organelle helps decode an mRNA message and translate it into polypeptide chains
Ribosomes
Where does translation take place ?
Endoplasmic reticulum
This organelle reconstructs and packages protein for secretion
Golgi complex
Where do lysosomes originate from?
Golgi complex
In regards to auto digestion, vitamin a causes what two things to happen
Lysis and swelling
In relation to vitamin a in auto digestion, cortisone serves what purpose?
Stabilizes the membrane reducing swelling
Where is ATP formed?
Mitochondria
Oxidative phosphorylation is also known as what
The electron transport chain
Cristae increases what
Inner membrane surface area
Microtubules attach and pull apart
DNA chromatids
Actin and myosin in muscle cells can form
Micro filaments
Desmosomes attach cells together and help to resist
shearing forces
Two cells attach together forming an impermeable barrier to fluid
Tight junction
Two cells allow their cytoplasms to join and allow for the exchange of various molecules and ions
Gap junctions
The opening and closing of a channel believed to be in association with integral membrane proteins
Gating
Hormonal chemicals in the blood can change cell function two ways
Attachment to receptor
Direct action on nucleus
Chemicals secreted outside a cell to influence patterns and behavior of near by cells
Paracrine
Secretion of chemicals to influence changes on the cell itself
Autocrine
Acts on surface receptors to amplify change within the cell
Second messengers
Derived from ATP and important in many biological processes
cAMP
