-
Blood clotting and childbirth are examples of _______ feedback.
Positive
-
______ feedback is the most common homeostatic mechanism
Negative
-
Contains all the carbohydrates, proteins, lipids, and amino acids within the cell.
Intracellular fluid
-
Intracellular fluid helps maintain high ________ and low ________ concentration
potassium; sodium
-
Extracellular fluid can be divided into these three groups:
Interstitial flud, plasma, transcellular fluid
-
______ helps control the viscosity of a cell.
Cholesterol
-
Integral proteins serve three functions:
- -As a channel or pore
- -Carrier proteins
- -Cell surface receptor
-
Peripheral proteins function as an ________ catylyst to affect inracellular events
enyzme
-
Cell recognition is made possible by __________
glycocalyces
-
These carbohydrate structures on the surface of the cell can serve as receptors for binding hormones (e.g. insulin)
Glycocalyx
-
Nucleoli is an accumulation of _____ and _____ within the nucleus
RNA and ribosomoes
-
Definition of chromatin
Coiled strands of DNA, bound to proteins
-
The main function of the endoplasmic reticulum is:
the production of proteins and lipids for cellular use and for secretion
-
The rough ER produces:
Proteins for the cell and for secretion
-
The smooth ER is responsible for:
- -Steroid production
- -membrane production
- -Contains enzymes
- -Stores calcium
-
Synthesis of carbohydrates occurs in the:
Golgi apparatus
-
Acts as the packaging center
golgi apparatus
-
This part of the golgi apparatus accepts vesicles from the ER
Cis face
-
The trans face of the golgi appartus is responsible for this
exporting vesicles
-
The layer of the inner membrane of the mitochondria is called the _______
cristae
-
Energy from ATP (adenosine triphosphate) is stored here
The phosphate bonds
-
Name at least 2 lysosome functions:
- -Contains hydrolytic enzymes that are produced in the RER
- -Are packaged in the golgi apparatus
- -Responsible for digestion of intra/extracellular materials
- -Exist in different "states" of activity
-
Three types of lysosomes:
- Primary
- Phagosome
- Secondary
-
Type of lysosome that contains digestive enzymes only
Primary enzyme
-
Type of lysosome that is a vesicle of material taken into the cell from the environment
Phagosome
-
A fusion of phagosome and primary lysosome where digestion of outside material occurs
Secondary lysosome
-
Filaments or tubulues that provide structural support yet may allow altering of shape, contractility, and movement
cytoskeleton
-
This filament helps anchor the cytoskeleton and can provide some contraction
Microfilaments
-
Larger than microfilaments; Provide strength for cell shape and stabilize organelle positions
Intermediate filaments
-
Keratins, Vimentin, Desmin, Glial filaments, and neurofilaments are type of ________ filaments
intermediate filaments
-
-Main constituent of cilia
-form mitotic spindles across chromosomes
-Maintain shape
-Participate in intracellular transport
Microtubules
-
o -Largest of filaments
-12-15mm in diameter
-Interacts with actin to produce contractions
Myosin
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