Objectives:
• Define what is meant by the
endomembrane system
• Describe the function of the
endomembrane system
• Outline the process of exocytosis and
endocytosis
Which statement about the smooth endoplasmic reticulum is INCORRECT?
Responda
The sER metabolises carbohydrates.
The sER synthesizes lipids.
The sER detoxifies drugs and poisons (non-nutritional chemicals).
The sER stores calcium.
The sER synthesizes proteins.
Questão 2
Questão
The amount of sER can increase or decrease according to a cell's demands.
Responda
True
False
Questão 3
Questão
The rough endoplasmic reticulum contains [blank_start]ribosomes[blank_end], and is the site of most [blank_start]protein[blank_end] synthesis. It also stores protein in the lumen, its [blank_start]interior[blank_end].
Responda
ribosomes
nucleic acid
protein
lipid
interior
exterior
Questão 4
Questão
Synthesis of cytoplasmic proteins occurs in the rER.
Responda
True
False
Questão 5
Questão
Which statement about the Golgi is NOT correct?
Responda
The Golgi has polarity, and is responsible for processing proteins from the rER.
The Golgi glycosolates proteins (adds sugars) and modifies simple carbohydrates to make complex carbohydrates.
Vesicles tagged for the plasma membrane exit the trans side of the Golgi.
Proteins destined to return to the rER to maintain its structure leave the Golgi in vesicles via the cis face.
Questão 6
Questão
The Golgi tags proteins so they are directed to the proper vesicle, and then tags those vesicles to direct them to the correct target compartment.
Responda
True
False
Questão 7
Questão
There are two pathways from the Golgi out of the cell. These [blank_start]exocytosis[blank_end] pathways can be continuous and unregulated, or "[blank_start]Constitutive[blank_end]" pathways (e.g. proteins transported to the ECM) or they can be "[blank_start]Regulated[blank_end]" pathways, for example the release of [blank_start]hormones[blank_end].
Responda
exocytosis
Constitutive
Regulated
hormones
Questão 8
Questão
[blank_start]Phagocytosi[blank_end]s is a type of endocytosis which is selective, and uptakes "food" to "eat". [blank_start]Pinocytosis[blank_end] however is the non-selective uptake of solutes. Endocytosis can also uptake [blank_start]very specific[blank_end] molecules via [blank_start]receptor mediated[blank_end] endocytosis.
All of these pathways join their vesicles with [blank_start]lysosomes[blank_end] for digestion.
Responda
Phagocytosis
Pinocytosis
very specific
receptor mediated
lysosomes
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