External and internal stimuli detection

Question 1

Examples of internal stimuli in plants and animals

Answer 1

Build up of toxins
Changes in pH
Blood pressure
Changes in Temperature

Question 2

examples of stimuli plants and animals respond to

Answer 2

temperature
climate changing seasons
predation

Question 3

Why do we need communication systems

Answer 3

To survive
Organisms need to respond to what is happening internally and externally

Question 4

How do plants monitor and respond to external and internal stimuli

Answer 4

They have no nervous system
Do it through the use of hormones instead

Question 5

How does the hormonal/endocrine system work

Answer 5

Cells in the system release hormones into blood
Signal recognised by target cells
Longer term response

Question 6

How does the neuronal system work

Answer 6

An interconnected network of neurons
Signal to each other across synapse junctions
Rapid response

Question 7

How does cell signaling work

Answer 7

chemicals released have a specific shape
complementary to that of a cell surface receptor on target cell

Question 8

What is homeostasis and what conditions are maintained by it

Answer 8

Maintenance of an organisms internal environment
Body temp
Glucose concentration
Salt concentration
Blood Pressure
Carbon dioxide concentration

Question 10

Standard Response Pathway

Answer 10

Stimulus-Receptor Communication pathway-effector-response