What is a law in biology

A cluster of tumor cells that produces and secretes growth factors to induce surrounding cells to grow and divide is showing whi

sergeinik [125]

A cluster of tumor cells that produces and secretes growth factors to induce surrounding cells to grow and divide is showing paracrine type of cell-to-cell signaling.

<h3>Paracrine signalling : </h3>

it is a type of the cell signaling.

it ptomotes cellular communication in which a cell produce a signal to induce change in the nearby cells.also altering the behavior of these cells.

Example neurotransmitters.

<h3>What is cell signaling? </h3>

It is type of signaling process through which one cell can communicate with another cell.

It can be intercellular or intracellular.

Cell signalling molecules are of 5 types: they are

Intracrine signaling, Autocrine signaling, Juxtacrine signaling, Paracrine signaling ,Endocrine signaling

it involves both mechanical and biochemical pathway for signaling.

cell signaling strats at the binding of signal molecules to the receptors, then signal transduction where chemical signal activates the enzyme and final step is the collection of response.

Learn more about cell signaling here :

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8 0

2 years ago

Match these items. 1. obtain food from non-living organic material taxis 2. mutually positive arrangement between species radiol

ElenaW [278]

Answer:

1. obtain food from non-living organic material (saprophyte)

2. mutually positive arrangement between species (symbiosis)

3. response to a chemical

(chemotaxis)

4. response to light (phototaxis)

5. member of phylum Foraminifera (radiolarian)

6. organism's response to a stimulus (taxis)

7. cell with membrane-bound structures (eukaryote)

8. organism in which a parasite is growing (host)

9. sexual reproduction in some protozoans (conjugation)

Explanation:

The items duely matched to its meaning above.

All the matches corresponds with each other, with small explaination of what each does.

7 0

3 years ago

Using your knowledge of organic molecules and the following experimental situation answer the next question. Experiment: A cello

Setler [38]

The answer should be A, inside the bag.

Permeable means allowing certain material to pass through. So if it's permeable to water and iodine, it means it can allow water and iodine to pass through the bag, but doesn't allow starch to go in.

Because iodine can pass through the bag, it can get into the bag filled with starch. But since starch couldn't diffuse out of the bag, the color change is only can be observed inside the bag. When no starch is gone out from the bag, there is no color reaction in the rest of the beaker.

So that answer is A.

4 0

3 years ago

When an action potential is generated within a motor neuron, ________. When an action potential is generated within a motor neur

svlad2 [7]

Answer:

every muscle cell of the motor unit is stimulated to contract.

Explanation:

Stimulus in biology can be defined as an obvious change in either the chemical or physical structure of an organism' environment (either external or internal). Thus, all living organisms (both animals and plants) respond to changes in their environment and consequently, an appropriate response or reaction is made. Also, stimulus arising from within the organism is known as internal stimulus while those from its environment are known as the external stimulus.

In organisms, the specialized cells that detect stimulus are generally known as sensory receptors while a group of these receptors is referred to as sense organ. Therefore, the senses are necessary for behavior because stimuli must be sensed in order to respond.

Stimulus control can be defined as a phenomenon that arises when a living organism responds or behaves in the presence of a stimulus and in another way in the absence of a stimulus.

For example, opening the door of a microwave oven as soon as its timer beeps.

Example II; When your body touches a hot object, you quickly move away and feel some pain subsequently.

Action potentials generates the nerve impulse in a motor neuron.

When an action potential is generated within a motor neuron, every muscle cell of the motor unit is stimulated to contract.

6 0

3 years ago

What are the two main components of the nervous system? A. the brain nervous system and the spinal cord nervous system B. the pa

ANTONII [103]

Answer: The correct answer is D. the central nervous system and the peripheral nervous system.

The nervous system is a complex system that is made up of nerves and nerve centers in different organisms that carries messages to and from the brain and the spinal cord to send them into various parts of the body.

It is primarily divided into-

1) CNS that is central nervous system ( made up of brain and spinal cord). The CNS is responsible for the voluntary functions of the body.

2) PNS that is peripheral nervous system ( possess cranial and spinal nerves arising from brain and spinal cord respectively). It controls the involuntary functions of the body.

7 0

3 years ago

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