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pg. 17 2. Homeostasis is an internal envrionment for cells that usually varies only within certain limits. Homeostases is maintained because other parts of the body help. If our body didn't respond to stimuli, then homeostasis would be impossible.

pg. 83 7. The skin is sometimes referred to as the integumentay system because the skin has several accessory organs (such as hair, nails, sweat glands, and sebaceous glands.)

11. Homeostasis is defined as the "relative constancy of the internal envrionment" because your body, through homeostasis, stays regular. Negative feedback tends to promote homeostasis because your body is out of the norm. YES Under negative circumstances, the body wants to go back to normal, so homeostasis kicks in.NO

pg. 245 9. the muscular system helps maintain homeostasis because of movement. Movement is essential to maintaining homeostasis. EXPLAIN

pg. 271 1. The nervous system recieves sensory input 2. The CNS performs integration 3. The CNS generates motor output

2. sensory neuron, interneuron, motor neuron cell body: contains the nucleus, and other organelles dendrites: the many short extensions that recieve signals from sensory receptors or other neurons. signals can result in nerve impulses that are then conducted by an axon axon: the portion of a neuron that conducts nerve impulses

pg. 293 1. exteroceptors - sensory receptors that detect stimuli from outside the body, such as those that result in taste, smell, vision, hearing, and equilibrium interoceptors - recieve stimuli from inside the body. ex: blood pressure, water-salt balance, pH of the blood

4. meissner corpuscles: fingertips, palms, lips, tongue, nipples, penis and clitoris merkel disks: where the epidermis meets the dermis root hair plexus: around the base of hair follicles pacininan corpuscles: lie deep inside the ermis ruffini endings: encapsulated by sheaths of connective tissue and contain lacy networks of nerve fibers.