Chapter 3 Pt. 4 Flashcards
What are the organelles where most of the cellular respiration occurs?
mitochondria
Mitochondria provides ________ that cells need
energy
The number of ____________ is roughly correlated with a cell’s demand for _______
mitochondria
energy
What is cristae?
the inholdings of the inner membrane of a mitochondrion
__________ contain _________ and a small percentage of a cell’s total DNA
Mitochondria
ribosomes
Mitochondria contain ribosomes and a small percentage of a cell’s total _____
DNA
Mitochondria contain ribosomes and a small percentage of a cell’s total DNA.
Why is this?
they are likely descendants of once free-living bacteria that invaded or were engulfed by ancient cells
What is the cytoskeleton?
a complex network of fibers
How is the cytoskeleton divided up?
(1) Microtubules
(2) Microfilaments
(3) Intermediate Filaments
Which main component of the cytoskeleton is this:
straight, hollow rods made of the protein
Microtubules
Which main component of the cytoskeleton is this:
solid rods made of the protein actin
Microfilaments
Which main component of the cytoskeleton is this:
a diverse group of ropelike fibers that maintain cell shape and anchor certain organelles in place
Intermediate Filaments
What is the thickest fiber in the cytoskeleton?
Microtubules
Some __________ maintain cell shape
microtubules
Some microtubules maintain ____ ______
cell shape
What part of the cytoskeleton forms tracks along which organelles or vesicles travel?
Microtubules
Microtubules play a role in the separation of ___________ during cell division
chromosomes
Microtubules contain _________
centrioles
What are centrioles?
a microtubule organizing center located near the nucleus
Each centriole is composed of __ sets of __ microtubules arranged in a ____
9
3
ring
Centrioles function in cell division and in the formation of ____ and ______
cilia
flagella
Is this cilia or flagella:
numerous short extensions on a cell that move with the back-and-forth motion of cars
cilia
Is this cilia or flagella:
singular, cilium
cilia
Is this cilia or flagella:
smoking, destroys these cilia and hampers cleaning or respiratory surfaces
cilia
Is this cilia or flagella:
resembles a whip and moves in an undulating manner
flagellum
Flagellum are much _______ than cilia
longer
the only cell with a flagellum in humans is the _______ _____
sperm cell
How do cilia and flagellum differ?
differ in length, number per cell, and pattern of movement
___________ are responsible for muscle contraction
Microfilaments
Microfilaments are responsible for _______ _________
muscle contraction
Who do microfilaments do during cell division?
form a bond that contracts and pinches the cell in two
________ __________ in intermediate filaments varies depending on the cell
Protein composition
