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29.3-29.5
| Term | Definition |
|---|---|
| signals from your sensory organs trigger what | homeostasis |
| sensory organs influence | homeostasis and behavior |
| Photoreceptors | detect light |
| mechanoreceptors | respond to pressure and movement |
| Thermoreceptors | Responds to heat |
| chemoreceptors | respond to chemicals that are dissolved in fluid |
| eye contains what percent of receptors | 70 |
| Rod cells | detect light |
| Cone cells | detect color |
| How does the eye adjust to light | muscles around the iris controls the size of the pupil |
| Ear collects | sound waves |
| Hair cells | inner ear that contain mechanoreceptors that detect vibrations |
| outer ear | pinna |
| the sound is amplified through 3 bones | malleus, incus, and the stapes |
| How does brain recieve sound | fluids in the cochlea respond to the wave and the auditory nerve brings the message to the brain as sound |
| Brain's three parts | Cerebrum, cerebellum, and brain stem |
| Cerebrum | controls thought, movement, and emotion |
| Brain Stem | controls basic life fucntion |
| 3 parts of Brain stem | Midbrain, pons, and medulla oblongata |
| Midbrain | controls some reflexes |
| Pons | regulate breathing |
| Medulla Oblongata | controls heart function swallowing and coughing |
| spinal cord control reflexes | sensory neurons send impulses to spinal cord and spinal cord detects impulse to motor neurons not involve brain |
| somatic nervous system | regulates voluntary movements |
| Autonomic nervous system | regulates involuntary functions |
| sympathetic nervous system | part of autonomic system and prepares body for action and stress |
| parasympathetic nervous system | part of autonomic system and calms and regulates body energy |
| CT scans | uses X-rays to view structure of brain |
| MRI scans | uses magnetic fields and radio waves to view strucutre |
| PET scan | detects activity where glucose used in the brain |
| changes in the brain chemistry can cause | illness |
| Neurotransmitters | stimulate or prevent impulses |
| Dopamine | emotional behavior, stress |
| serotonin | mood hunger |
| Glutamate | learning and memory |
| GABA | prevent neuron from generating an impulse |
| schizophrenia | abnormal amounts of dopamine |
| depression | low serotonin |
| addiction | physiological need for a substance |
| tolerance | more of a drug is needed to cause an effect |
| drugs might cause | desensitization or sensitization |
| desensitization | more neurotransmitter leads to fewer receptors |
| sensitization | less neurotransmitters leads to more receptors |
| stimulates do what | more action potential increase neurotransmitters in synapse decrease removal of neurotransmitters in synapse |
| depressants | drug that make a person feel relaxed and tired |
Created by:
ronabraham@cox.net
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