The hypothalamus detects fluctuations in temperature. The receptors on it are known as thermoreceptors. Skin also possesses thermoreceptors which can detect the temperature of the external environment. This information is relayed to the hypothalamus which can in turn transmit nerve pulses for corrective mechanisms to occur. If you are HOT, sweating and vasodilation occurs. If you are COLD, vasoconstriction and shivering occur. In extreme cold, blood flow to extremities decreases in order to protect internal organs. This is an example of:
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turtles in ponds.png Which pond has a higher species richnes…
turtles in ponds.png Which pond has a higher species richness?
The Gulf of Mexico “dead zone” is caused by:
The Gulf of Mexico “dead zone” is caused by:
________use chemicals from the environment (like deep-sea ve…
________use chemicals from the environment (like deep-sea vents) to make their food.
On the epidermis of a leaf are small holes that allow CO2 in…
On the epidermis of a leaf are small holes that allow CO2 in and O2 out called:
Hox genes determine:
Hox genes determine:
Which of the following threaten(s) biodiversity?
Which of the following threaten(s) biodiversity?
How many years are represented by one ring on a tree?
How many years are represented by one ring on a tree?
On a tree, where would the vascular tissue be found?
On a tree, where would the vascular tissue be found?
What event marked the end of the Cretaceous and beginning of…
What event marked the end of the Cretaceous and beginning of the Tertiary periods?