Explain how the hypothalamus regulates body temperature when a person is exposed to warm conditions
What will be an ideal response?
The hypothalamus functions as the control center in this homeostatic control system. In a warm environment, thermoreceptors on the skin detect heat and activate nerve cells that send the message to the hypothalamus. The hypothalamus sends nerve impulses to the sweat glands (effectors), prompting them to increase their activity. Once sweat evaporates, the body cools, and signals from the brain to the sweat glands cease.
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Photosynthetic autotrophs use ________ from the air as a carbon source and ________ as their energy source
Fill in the blank(s) with correct word
Soil particles that are decomposing organic matter are called
a. sand. b. humus. c. silt. d. clay. e. mineral.
The most direct ancestors of land plants were probably _____.
A. green algae B. kelp (brown alga) that formed large beds near the shorelines C. liverworts and mosses D. photosynthesizing prokaryotes (cyanobacteria)
Melatonin is secreted by the_____
A) hypothalamus during the day B) pineal gland during the night C) autonomic nervous system during the winter D) posterior pituitary gland during the day