Julie+Nervous+System+Reading

2. What is homeostasis, and how is it maintained? Give some examples that show how systems work together to maintain homeostasis. - homeostasis is an internal environment for cells that usually varies only within certain limits. an example is the cells with in the digestive system having to become warmer or cooler to help the digestive system. OK YOUR EXAMPLE COULD BE MORE SPECIFIC
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7. Explain why the skin is sometimes referred to as the integumentary system? - it is sometimes referred to as the integumentary system because the skin has several accessory organs. BE MORE SPECIFIC, WHAT ORGANS DOES SKIN HAVE - 11. Why is homeostasis defined as the "relative constancy of the internal environment?" Does negative feedback or positive feedback tend to promote homeostasis? Explain -Homeostasis is defined as the "relative constancy of the internal environment" because the environment on the out side of the body may change frequently and drastically but internally it will mostly stay the same. Negative feedback tends to promote homeostasis. EXPLAIN 9. How does the muscular system help maintain homeostasis? -It helps maintain homeostasis because the contractions allow movement so we can move around in the environment. HOW DOES THIS HELP MAINTAIN HOMEOSTASIS
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1. What are three functions of the nervous system - three functions of the nervous system are central nervous system the peripheral system and CNS and ONS BUT WHAT ARE THEIR FUNCTIONS? 2. What are the functions performed by the three types of neurons? Describe the structure and functions of the three parts of the neuron. -The functions performed by the three types of neurons are sensory neurons, which takes nerve impulses. Sensory receptors detect changes in the environment and interneuron can receive input in the CNS.
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1. Contrast exteroceptors and interoceptors. -Exteroceptors are sensory receptors that detect stimuli from outside the body, such as those that result in taste and smell. Interoceptors receive stimuli from inside the body such as change in blood pressure.
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4. List the cutaneous receptors and the type of stimulus each respond to. -Free nerve endings (pain, heat, cold) -Merkel disks (touch) -Krause end bulbs (touch) -Root hair plexus (touch) -Meissner corpuscles (touch) -Pacinian corpuscles (pressure) -Ruffini endings (pressure)