biology topic 3

Organisms survive most effectively within their tolerance limits. Factors for which organisms have tolerance limits include: body temperature water availability blood glucose level carbon dioxide concentration. There are impacts on an organism when conditions fall outside its tolerance limits. Organisms detect and respond to changes in the internal and external environment. Homeostasis is the set of detections and responses that result in the internal environment of an organism remaining

The nervous system is composed of the central nervous system and the peripheral nervous system. Compare the structure and function of sensory neurons, interneurons, and motor neurons. Describe the structure of a nerve pathway from receptor to effector. Describe the role of synapses and neurotransmitters. Describe the role and pathway of reflex responses.

The endocrine system releases hormones that are peptides, proteins, or steroids. Hormones travel to target sites via the blood. Hormones can alter the metabolism of target cells, tissues, or organs. Compare the action of insulin and glucagon in blood sugar regulation. Describe how diabetes can result from a hormonal imbalance. Describe the action of thyroid stimulating hormone and thyroxine in metabolism. Describe the role of antidiuretic hormone (ADH) in osmoregulation. Discuss links bet

The nervous system and endocrine system function independently or together to maintain homeostasis. Compare the action of the endocrine and nervous systems. Explain how the nervous and endocrine systems work independently or together to: control body temperature enable osmoregulation maintain blood sugar levels monitor carbon dioxide levels to maintain constant pH of blood.