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WorksheetsBiochem of Signaling_LEC_Check your Understanding
Total questions: 14
Worksheet time: 7mins
TRUE or FALSE:
If there is an equal distribution of charges between the ECF and ICF, there is an established membrane potential.
TRUE
FALSE
TRUE OR FALSE
The usual ions that may change the membrane potential of the cell membrane are cations.
TRUE
FALSE
Where can you find a higher concentration of Sodium ions (Na+) when the cell is in its resting potential state?
Only in the ECF
Only in the ICF
Both ICF and ECF
Which of the following channels is usually open for transport of substances?
Leak Channels
Voltage-gated Channel
Ligand-gated Channel
Pumps
Which of the following ions usually enters the cell first through their gated channels when there is a change in the resting membrane potential?
Na+
K+
Cl-
Ca2+
Consider this charge distribution and choose whether there is membrane potential or none:
ECF: (-10, +14)
ICF: (-19, +14)
With Membrane Potential
Without Membrane Potential
The minimum charge required to open K+ voltage gated channel is (include the unit)
(a)
Which of the following is FALSE regarding the use of chemical messengers?
It is slower than electrochemical signals.
It can be sustained.
Many cells can release chemical messengers.
It is a direct type of communication.
TRUE OR FALSE
Chemical messengers will always have a receptor located at the cell membrane.
TRUE
FALSE
Which of the following is NOT a long-range chemical messenger?
Paracrine
Neurohormone
Pheromone
Cytokine
Dopamine is released by neurosecretory cells. This can just be released in synapses or be present in the blood. This chemical messenger is an example of ___________.
Neurohormone
Cytokine
Paracrine
Hormone
Which of the following is NOT a characteristic of a lipophobic signal tranduction?
Its receptors are found inside the cell.
It creates secondary messengers in the cell.
It usually is related to polar chemical messengers.
They may open or close channels when bound to their receptors.
What do you call to the substances like chemical messengers that attaches to a receptor?
(a)
Which of the following chemical messengers may be considered to have the farthest range of target cells?
Cytokine
Pheromone
Hormone
Paracrine
