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WorksheetsPrinciples of Cell Communication
Total questions: 15
Worksheet time: 12mins
These are molecules, ions, or atoms that combine with receiving molecules along the membrane of the cell irreversibly.
Signals
Receptors
Biomolecules
Ligands
What communication process is involved when the cell responds to the ligands through a series of signal sending to the molecules found on the surface of and inside the cell.
Reception
Transduction
Response
Cell communication solely involves communication between other cells.
TRUE
FALSE
Which of the following best describes the role of neurotransmitters in neuron-to-neuron communication?
Neurotransmitters are local regulators that allow neurons to communicate over short distances.
Neurotransmitters are long-distance signaling molecules that allow neurons to communicate over short distances.
Neurotransmitters are local regulators that allow neurons to communicate over long distances.
Neurotransmitters are long-distance signaling molecules that allow neurons to communicate over long distances.
The tobacco mosaic virus (TMV) is a plant virus that infects a wide range of plants, including tobacco. In order to enter and travel through the cells of a plant, TMV produces a movement protein. This protein helps the virus travel directly between the cytoplasm of interconnected plant cells.
Which of the following best predicts how the movement protein modifies plant cells in order to help TMV travel from cell-to-cell?
The movement of the protein increases the formation of cell walls between plant cells.
The movement protein modifies the vacuoles within plant cells.
The movement protein increases the formation of transport vesicles within the plant cells.
The movement protein modifies the plasmodesmata between plant cells.
Which of the following is an example of endocrine signaling?
The ovary secretes oxytocin to the uterus of the body.
The adrenaline boosts strength to the muscles of an athlete.
Melatonin induces sleep and is used to correct irregular sleeping patterns.
Platelets responds to wounded areas to blood clot.
What is the main difference in terms of the mechanism of the chemical production of endocrine cells and nerve cells?
Chemicals transmitted by endocrine cells are (a) than the chemicals of the nerve cells to take effect.
What form of signaling is observed when cells respond to different allergens?
contact-dependent signaling
paracrine signaling
synaptic signaling
endocrine signaling
In such autocrine signaling, a cell secretes signal molecules that can bind back to its own receptors. Autocrine signaling is most effective when performed simultaneously by neighboring cells of the same type, and it is likely to be used to encourage groups of identical cells to make the same developmental decisions.
Why do you think this is important in the developmental stages of an organism?
Because autocrine signaling helps in the c (a) of developmental cells.
During the humoral immune response, helper T-cells activate B-cells through cell communication. This process is shown in the image below.
During an experiment, researchers introduced a substance that caused the T-cell receptor to break down.
Which of the following best describes how the humoral immune response will be affected?
The helper T-cell will still bind to the B-cell, but the B-cell will not be activated.
The helper T-cell will no longer bind to the B-cell, and as a result, the B-cell will not be activated.
The helper T-cell will still bind to the B-cell, but the B-cell will instead be activated by a killer T-cell,
The helper T-cell will no longer bind to the B-cell, and the B-cell will instead be activated by helper T-cells releasing long-distance signals.
A gap junction allows coordination between two neighboring cells by forming a direct connection channel placed closely between their plasma membranes.
TRUE
FALSE
At which scenarios/environments can lead to cell death or apoptosis?
A cell injected to an animal for experimentation.
A stem-cell patient recently undergo therapy
A cell placed in a culture for a week.
An amoeba placed in another similar environment.
What principle of cellular communication is shown in the image?
Neurons send signals with neurotransmitters through:
Direct contact with through gap junction
Long distance signaling in the bloodstream
Local signaling across the synaptic cleft
Point-to-point communication between neighboring cells
To complete external fertilization in fish, sperm cells must swim through open water in order to fertilize egg cells. During this process, females release a substance called ovarian fluid, which helps guide the sperm cells toward the egg cells. Researchers hypothesized that sperm cells are mainly attracted by ovarian fluid released from the same species.
To test this hypothesis, researchers performed an experiment in which they studied the effects of salmon ovarian fluid and trout ovarian fluid on salmon sperm. In each trial within the experiment, the researchers placed salmon sperm on one side of a porous membrane and either salmon ovarian fluid, trout ovarian fluid, or water on the other side. After two minutes, the researchers counted how many salmon sperm had passed through the membrane and into the fluid. The results are presented in the graph below.
Mean numbers \pm±plus minusSE of salmon sperm passing through porous membrane into salmon ovarian fluid (black bar), trout ovarian fluid (grey bar), and water (white bar).
Which of the following conclusions is best supported by the data above?
Salmon sperm respond more strongly to long-distance signaling molecules in salmon ovarian fluid than to those in trout ovarian fluid.
Salmon sperm respond more strongly to long-distance signaling molecules in trout ovarian fluid than to those in salmon ovarian fluid.
Salmon sperm respond more strongly to local regulators in trout ovarian fluid than to those in salmon ovarian fluid.
Salmon sperm respond more strongly to local regulators in salmon ovarian fluid than to those in trout ovarian fluid.
