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WorksheetsJib225W3 PART 2
Total questions: 10
Worksheet time: 10mins
Which of the following choices is not a basic feature of cellular communication?
The signal must be produced
The signal can be produced only by a eukaryote
The signal must be transported to a target cell
The target cell must respond to the signal
When indirect signaling is used, the target cell responds to the signal when that chemical
binds to an enzyme
binds to a receptor
binds to a gene
binds to the nuclear membrane
A chemical is termed a neurohormone when it is
released by neurons and endocrine glands
released by an endocrine gland, but binds to receptors on a neuron
released by a neuron, but travels in the blood like a hormone
The vertebrate hormones involved in water and electrolyte balance in the body are called
glucocorticoids
ecdysteroids
mineralocorticoids
Antagonists are compounds that bind to a receptor, but do not activate it
TRUE
FALSE
The response of a cell to a particular chemical messenger is determined by the ligand-binding domain
TRUE
FALSE
Enzymes that remove phosphates from other proteins are called kinases
TRUE
FALSE
In the nervous system, chemical messages cross a synapse, short distance between the signal and target cells
TRUE
FALSE
The term protein is used for chains more than fifty amino acids long, while the term peptide is reserved for shorter chains
FALSE
TRUE
In a __________ feedback loop, both the endocrine and nervous systems can be involved
second order
third order
second order
first order
first order
second order
