Question

characteristics of life
name
class period:
4a. list which of the following is a stimulus and which is a response?
a) the recess bell ringing in an elementary school

b) your mouth watering at the sight of food on a plate

c) a sudden drop in air temperature

d) a flu virus entering your body

e) getting “butterflies” in your stomach before giving a speech

Explanation:

To solve this, we first recall the definitions: a stimulus is a change in the environment (internal or external) that causes a response, and a response is the organism's reaction to the stimulus.

Part (a)

• The recess bell ringing is an external event (stimulus) that triggers a response (like students heading to recess).
• So, (a) is a stimulus.

Part (b)

• The sight of food (stimulus) causes your mouth to water (your body’s reaction).
• So, (b) is a response.

Part (c)

• A sudden drop in air temperature is a change in the environment (stimulus) that could cause a response (like shivering).
• So, (c) is a stimulus.

Part (d)

• A flu virus entering your body is an external agent (stimulus) that triggers an immune response.
• So, (d) is a stimulus.

Part (e)

• The thought/nervousness of giving a speech (stimulus) causes “butterflies” in your stomach (your body’s reaction).
• So, (e) is a response.

Final Answers:

a) Stimulus
b) Response
c) Stimulus
d) Stimulus
e) Response

Answer:

To solve this, we first recall the definitions: a stimulus is a change in the environment (internal or external) that causes a response, and a response is the organism's reaction to the stimulus.

Part (a)

• The recess bell ringing is an external event (stimulus) that triggers a response (like students heading to recess).
• So, (a) is a stimulus.

Part (b)

• The sight of food (stimulus) causes your mouth to water (your body’s reaction).
• So, (b) is a response.

Part (c)

• A sudden drop in air temperature is a change in the environment (stimulus) that could cause a response (like shivering).
• So, (c) is a stimulus.

Part (d)

• A flu virus entering your body is an external agent (stimulus) that triggers an immune response.
• So, (d) is a stimulus.

Part (e)

• The thought/nervousness of giving a speech (stimulus) causes “butterflies” in your stomach (your body’s reaction).
• So, (e) is a response.

Final Answers:

a) Stimulus
b) Response
c) Stimulus
d) Stimulus
e) Response