Question

1. the body responds to changes in the temperature of the external environment (our surroundings) by ____ when it is too cold __ and ____ when it gets too hot.

a. sweating, shivering
b. shivering, sweating
c. doing nothing, doing too much
d. dilating blood vessels, constricting blood vessels

1. it is important for the body to keep the vital (important) internal organs at a

ormal\ temperature range (homeostasis). through observations in lab 2: thermoregulation, and living here in nys during the summer and winter, we can conclude that internal body temperature changes ____ compared to external (skin) body temperature, which can change ____ for certain periods of time before we cannot maintain homeostasis.
a. a lot, by 1 or 2 degrees
b. decrease, drastically
c. are the same, together
d. a little, a lot

1. what is the \set point\ when referring to a phenomena in biology?

a. the middle of a line graph, or the median measurement in a set of data.
b. the
ormal\ range (homeostasis) of an organism, which can be shown using models.
c. the way we point and click the internal thermometers we used in lab 2.
d. conditions that the body wants to avoid staying at for too long.

Explanation:

1. When the body is too cold, it shivers (muscle contractions generate heat). When it's too hot, it sweats (evaporation cools the body).
2. Internal body temperature (core) changes a little (maintained via homeostasis). External (skin) temperature can change a lot (exposed to environment).
3. In biology, the "set point" refers to the normal range (homeostasis) of an organism (e.g., normal body temperature range). It can be modeled (e.g., feedback loop models).

Answer:

1. B. Shivering, Sweating
2. D. A little, a lot
3. B. The "normal" range (homeostasis) of an organism, which can be shown using models.