Examlex
Name the structure in which proteins associate with DNA and pack it very tightly by organizing the molecules.
Accelerates Heartbeat
Causes an increase in the speed of heart contractions, often as a response to exercise, stress, or excitement.
Endocrine System
A network of glands in the body that secrete hormones into the bloodstream to regulate various bodily functions.
Chemical Messengers
Compounds such as hormones and neurotransmitters that transmit signals from one cell or organism to another, affecting physiological activities.
Hormones
Chemical messengers produced by endocrine glands that regulate various bodily functions and processes.
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