Chapter 36 – The Nervous System: Section Assessments Answer Key Section 36.1 – The Nervous System 1. The inside of the neuron is more negatively charged than the outside.
The cerebrum controls conscious activities, intelligence, memory, language, movement and the senses. The cerebellum controls posture, balance and coordination. The medulla oblongata mainly controls involuntary activities such as breathing at the heart rate. The sympathetic nervous system controls functions in times of stress, while the parasympathetic controls functions while the body is at rest.
The pump moves three sodium ions out for every two potassium ions it pumps into the cell. A reflex is a involuntary action that does not involve conscious control by the brain.
You cannot stop it. An impulse reaches the end of an axon, opening calcium channels. This causes vesicles to fuse with the membrane and release their chemicals.
These chemicals diffuse across the synaptic cleft to the dendrites of the next neuron. Section 36.2 – The Senses 1. The eyes respond to light. The ears respond to sound. Touch receptors respond to mechanical stimulation.
The tongue and nose respond to chemicals. The taste of food involves both the sense of smell and the sense of taste. Light stimulates the rid and cone cells in the retina, which transmit a nerve signal to the brain by way of the optic nerve. Touch, temperature, pressure and pain. Swelling associated with an ear infection could cause fluid in the ear to put pressure on the semicircular canals and cause the hairs in the canals to signal a false sense of balance in the brain. Outer ear, eardrum, malleus, incus, and stapes, fluid of cochlea, hairs of cochlea, auditory nerve to the brain.
Section 36.3 – The Effects of Drugs 1. Drugs are used to normalize an irregular heartbeat, increase the hearts pumping capacity, or enlarge small blood vessels. Aspirin inhibits the production of impulses at the site of pain, while narcotics work on the central nervous system to relieve pain. Nicotine will stimulate the central nervous system, causing an increase in the heart rate, blood pressure, and breathing rate. Drugs can increase or decrease the amount of neurotransmitters found between neurons. A physician knows the medical history of the patient and can treat problems that might occur as side affects of the drug.
36 Reinforcement And Study Guide Answers
Stimulants increase the activity of the central and sympathetic nervous systems. Depressants decrease the activity of the central nervous system and increase the activity of the parasympathetic nervous system.
Night Study Guide Answers
Stimulants can increase alertness, nervousness, anxiety, heart rate, and breathing rate. Depressants do the opposite.
Section 3 Reinforcement Answers
Books.google.co.th - Each chapter includes a review of key concepts, guided study questions, and section reviews that encourage students’ active participation in the learning process; two practice tests and a challenge test help them assess their mastery of the material. Applications and observational activities are also. The Study Guide for Developing Person Through the Life Span.