2 What is the function of the nervous system? RegulationTo regulate (control) all body processes.
3 1. A muscle or gland which responds to a message carried to it by motor neurons is called a(n) _______.2. A change in the surroundings or the environment that triggers a nerve impulse is called a(n) _____.3. The electrochemical message that travels through the nervous system is known as the _________.4. A change in the external environment that initiates (starts) an impulse is called a _______.5. Nerve cells are called __________.effectorstimulusimpulseimpulseneurons
4 Neuron StructureMost axons are covered with ___________ which aids impulse transmission by improving electrical insulation.___________ receive the impulse from the previous neuron.The longest part of a neuron is the ______.The ____________ contains the nucleus and other cell organelles.The part of the neuron that produces and releases neurotransmitters are the ____________.Neurotransmitters attach to __________ on the next neuron.myelinDendritesaxoncell bodyterminal branchesreceptors
5 How does an impulse travel from one neuron to the next? Neurotransmitters are released into the synapse.
6 A structure that detects stimuli is a a) effector b) synapse c) receptor d) muscle
7 Synapses are located directly between (1.) dendrites and axons (2.) cytons and axons (3.) terminal branches and dendrites (4.) axons and terminal branches
8 Central Nervous System What does this picture represent?Central Nervous System
9 Sensory neurons transmit impulses from the _________ to the ________________. 2. Interneurons carry impulses from the _____________ to ____________.3. Motor neurons carry impulses from the __________ to ___________.receptorsspinal cord (CNS)sensory neuronsmotor neuronsspinal cordeffectors
10 from the central nervous system to a muscle a gland Sensory neurons transmit messagesfrom the central nervous system to a muscle a glandb) from the brain to the spinal cordc) from the environment to the spinal cord or braind) within the braine) All of the above are true.
11 In a simple spinal reflex, the pathway for an impulse is along a sensory neuron directly to a motor neuron through (1.) a receptor (2.) an interneuron (3.) an effector (4.) the brain
12 What structures make up your central nervous system? Brain and Spinal Cord
13 Neurons that carry messages toward the CNS (brain and spinal cord) are called sensory neurons
14 cerebrum medulla cerebellum cerebrum medulla Identify the part of the brain being describe.What structure controls reasoning, memory, emotions, and habits?What controls involuntary actions?What controls and coordinates voluntary actions and balance?Loss of memory as a result of an accident would indicate damage to which part?What controls activities such as breathing and heart rate?cerebrummedullacerebellumcerebrummedulla
15 cerebrum cerebellum medulla spinal cord Identify the parts of the brain labeled in the diagram.cerebrumcerebellummedullaspinal cord
16 Why are reflexes much faster than a normal response? The impulse only travels to the spinal cord, not the brain.
17 motor neuronBReceptorinterneuronAsensory neuron
18 According to this diagram, a gland secretes a chemical According to this diagram, a gland secretes a chemical. What is the name of this chemical?2. The organs and tissues that the chemical is transported to by the blood is made up of what kind of cells?3. What do hormones attach to on these cells?HormoneTarget cellsReceptors
19 An important method of communication between cells is shown in the diagram. What is the chemical referred to in the diagram?a hormone important in maintaining homeostasisan enzyme detected by a cell membrane receptorDNA necessary for regulating cell functionsa food molecule taken in by an organism
20 Which substances are found on cell surfaces and respond to nerve and hormone signals? starches and simple sugarssubunits of DNAvitamins and mineralsreceptor molecules
21 Cell C has receptors that fit perfectly with the hormone. 1. What does structure B represent?2. Explain why cell C is the target cell.receptorsCell C has receptors that fit perfectly with the hormone.
22 Which substances are found on cell surfaces and respond to nerve and hormone signals? starches and simple sugarssubunits of DNAvitamins and mineralsreceptor molecules
23 If a human system fails to function properly, what is the most likely result? a stable rate of metabolisma disturbance in homeostasisa change in the method of cellular respirationa change in the function of DNA
24 Pituitary gland Parathyroid gland Thyroid gland Adrenal glands Identify all glands labeled in the diagtam.Pituitary glandParathyroid glandThyroid glandAdrenal glandsPancreasOvaries
25 Follicle stimulating hormone and luteinizing hormone A hormone that increases the rate and strength of heart contractions during times of sudden stress is secreted by which structure? What is the name of this hormone?2a.Hormones that regulate the ovaries are secreted by which structure?2b.What are the name of these hormones?Adrenal glandsAdrenalinePituitary glandFollicle stimulating hormone and luteinizing hormone
26 Thyroxine Thyroid Parathyroid glands Pancreas Insulin Glucagon What is the name of the iodine-containing hormone that aids in the regulation of metabolic rate? What structure secretes this hormone?4. What structure regulates calcium metabolism?5. Which structure regulates blood glucose levels? What is the name of those hormones?ThyroxineThyroidParathyroid glandsPancreasInsulinGlucagon
27 2. What part of the brain controls the pituitary gland? 1. What HORMONE causes blood sugar level to decrease? What GLAND produces this hormone?2. What part of the brain controls the pituitary gland?3. What hormones produced by the ovaries stimulate the production of female secondary sex characteristics?InsulinPancreasHypothalamusEstrogen
28 It regulates other glands in the body. What is the name of the thyroid HORMONE which controls body metabolism?Which HORMONE helps to stimulate the development of secondary sex characteristics in the male?3. Why is the pituitary glands called the “master gland?”ThyroxineTestosteroneIt regulates other glands in the body.
29 Increased perspiration, a higher body temperature, and a rapidly beating heart are all possible responses to a stressful situation. These body responses are most likely a direct result of the interaction of thedigestive and endocrine systemsdigestive and respiratory systemsnervous and endocrine systemsnervous and reproductive systems
30 Which graph of blood sugar level over a 12-hour period best illustrates the concept of homeostasis?
31 Which statement describes a feedback mechanism involving the human pancreas? The production of estrogen stimulates the formation of gametes for sexual reproduction.The level of oxygen in the blood is related to heart rate.The level of sugar in the blood is affected by the amount of insulin in the blood.The production of urine allows for excretion of cell waste.
32 Hormones and secretions of the nervous system are chemical messengers that store genetic informationcarry out the circulation of materialsextract energy from nutrientscontrol and coordinate system interactions
33 1. This diagram best illustrates a. recombination b. feedback c. insertion d. deletion2. What is the function of this process?Maintain homeostasis.Regulate hormone levels in the blood.