6A Edrolo Chapter

Question 1

What is homeostasis?

Answer 1

A process that maintains the internal environment of an organism so that systems can function appropriately

Question 2

5 things that effect function of cells

Answer 2

• Temperature
• pH acidity level
• Blood sugar levels
• Sodium and Potassium concentration
• Fluid balance

Question 3

What is the stimulus-response model?

Answer 3

Outlines how the changes in external and internal environments can influence an organisms functions

Question 4

The 5 components of the stimulus-response model

Answer 4

1. Stimulus
2. Receptor
3. Modulator
4. Effecter
5. Response

Question 5

Describe the Stimulus component of the stimulus-response model

Answer 5

The change in the internal and/or external environment of the organism

Question 6

Describe the Receptor component of the stimulus-response model

Answer 6

The receptor detects the stimulus and transfers its knowledge to the Modulator

Question 7

Describe the Modulator component of the stimulus-response model

Answer 7

Information detected via the receptors are sent to the Modulator. The Modulator compares this information to the ideal state for the organism and then releases molecules to alter the functioning of an effector

Question 8

Describe the Effecter component of the stimulus-response model

Answer 8

A molecule, cell, or hormone that responds to the signal of the Modulator and produces a response

Question 9

Describe the Response component of the stimulus-response model

Answer 9

The Effecter initiates the response. The response can be any change to react to the stimulus.

Question 10

Thermoreceptors

Answer 10

Detect changes in temperature

Question 11

Nociceptors

Answer 11

Detect painful stimuli

Question 12

Baroreceptors

Answer 12

Detect changes in pressure

Question 13

Chemoreceptors

Answer 13

Detect changes in chemical concentration

Question 14

Photoreceptors

Answer 14

Detect changes in light

Question 15

When does the positive feedback system occur?

Answer 15

When the response increases the initial stimulus

Question 16

When does the negative feedback system occur?

Answer 16

When the response counters the stimulus

Question 17

Three steps of cellular signaling

Answer 17

1. Reception
2. Transduction
3. Response

Question 18

Describe the reception part of cellular signalling

Answer 18

The detection of the stimulus and then converting this into an electrical, chemical, or mechanical signal

Question 19

Describe the Transduction part of cellular signalling

Answer 19

The transmission of signal during cellular signaling. Can involve sending a signal between organisms, across the body, to a neighboring cell, or back to the original receptor cell

Question 20

Describe the Response part of cellular signalling

Answer 20

The change in the function of the target cell, organ, or organism