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WorksheetsCell Communication Review 4.1-4.5
Total questions: 16
Worksheet time: 8mins
What is the first step of signal transduction?
response
reception
transduction
transcription
What is the signaling molecule called?
Repressor
Activator
ligand
enhancer
All cells respond to the same ligand with the same response
True
False
What is an example of a cellular response?
turn on a gene
activate an enzyme
change in metabolism of the cell
All of the answer are correct
During transduction a protein kinase changes confirmation (shape) when
It is phosporylated
before the ligand binds
phosphorylase enzyme activates it
during reception
Which is a secondary messenger?
Ligand
Hormone
ATP
cAMP
Calcium (Ca+) is released from the ER which allows for muscular contractions. What receptor mechanism is used to release the Ca+?
Simple diffusion
active transport
gated ion channel
ion channel
Signal transductions pathways have multiple step which allows for
less ATP to be used
amplification
a longer response
different responses at once
A mutation in the receptor protein will
change the cells ability to respond to the signal
allow for a different cellular response
cause multiple cellular responses
make no change for the cell
What is apoptosis?
The relay of a signal through a gap junction
Cells undergoing cell division after a wound
programmed cell death
endocrine cells secreting proteins
Apoptosis involves
DNA and organelles fragmented and forming blebs to self digest
Cell death that stimulates nearby cells to divide
Cell lyses and phagocytosis of released particles for recycling
DNA and organelles fragmented and the entire cell is phagocytized
This receptor leads to a change in the distribution of ion
Receptor tyrosine kinase
G protein-coupled receptors
intracellular receptors
ligand-gated ion channels
When estrogen is released it affects the cell that releases it, nearby cells and cells all over the body. This is an example of
paracrine signaling
autocrine signaling
endocrine signaling
all of these
When estrogen is released only a small amount of cells are affected because
non target cells go through apoptosis
only target cells are exposed to the signal
it is unable to enter non target cells
only target cells have the receptor
During labor oxytocin is released. When labor pains increase more oxytocin is released causing more labor pain which increases the levels of oxytocin. This is an example of what type of feedback
negative feedback
homeostasis feedback
positive feedback
a decrease in the stimulus
After eating a carbohydrate rich meal what changes would occur in the body?
An increase in insulin
An increase in glycagon
A decrease in blood glucose
A decrease is glucose uptake by the liver
