Lecture 1 Part 2 Flashcards
What type of feedback?
Parturition
Positive feedback
What type of feedback?
Vasodilation
Negative feedback
What makes a membrane “fluid” and not stiff?
Cholesterol
(More cholesterol = less stiff)
What is the basic building block of the cytoskeleton?
Proteins
(more specifically g-actin (aka globular actin))
What 2 functions do carbohydrates attached to the cell membrane perform?
-cell signaling
-cell identification
(Think of them almost like cell phone towers on the external surface of the membrane)
What is the name of the structures attached to cell membranes that aid in moving things/secretions across the membrane?
Cilia
What connects the cilia to the cell membrane?
Basal body
What cylindrical structure controls movement of DNA strands when a cell divides?
Centrioles
This organelle is responsible for synthesizing polypeptides (building block of proteins)
Ribosome
What 2 locations are ribosomes found?
-free in cytoplasm
-attached to rER
This organelle “sandwiches” the mRNA in appropriate combinations
Ribosome
Within the ribosome, the ___ site reads the codon
A site
Within the ribosome, the ___ site builds the polypeptide chain
P site
This organelle is the “powerhouse” or the site of aerobic respiration
Mitochondria
What organelle does the Krebs cycle occur in?
Mitochondria
Pt. is having metabolic issues. What organelle is probably dysfunctioning?
Mitochondria
What organelle makes you think of these terms:
Anti-oxidants
Free radicals
Inflammatory mediators
Peroxides
Mitochondria
What 2 organelles have their own DNA?
Mitochondria
Neuclei
TCA cycle occurs in the _________
Mitochondria
Oxidative phosphorylation occurs in the _________
Mitochondria
This organelle is the primary site of reactive oxygen species (ROS) production
Mitochondria
This organelle synthesizes proteins
Rough Endoplasmic Reticulum (rER)
What organelle makes the rER rough?
Ribosomes
What organelle does the rER send proteins to?
Golgi
What organelle processes lipids?
Smooth ER (sER)
What organelle will help repair a damaged cell membrane?
Smooth ER
(because It makes lipids)
When you think of low testosterone, what organelle do you think of?
sER
(synthesizes lipids & cholesterol aka steroids aka sex hormones)
Which organelle is the UPS/Fedex of the cell?
Golgi
Cellular products enter the golgi through the ____ face
Cis face
Cellular products leave the golgi via the ____ face
Trans face
If a word ends in -ase, it means its an _________
Enzyme
DNA is stored in the _____
nucleus
Which intercellular junction type allows small molecules to pass between cells?
Gap junctions
