b. cingulate cortex. Which of the following would be most likely to increase heart rate? Neurons may be classified according to several characteristics. A) They conduct impulses. These cells have a star-like shape and a central body that contains the . a. innervation of glands. d. Activation of postganglionic parasympathetic neurons, 65. The part of a neuron that conducts impulses away from its cell body is called a(n) ________. (1991) finds that the CA1 neuron exhibits trains of action potentials when a small current (< 1 nA) is applied to the soma, but a full calcium spike and burst followed by trains of action potentials when the same small current is applied to . a. Astrocytes B) amplify or enhance the effect of ACh 55. Which of the following membrane regions would have significant numbers of voltage-gated ion channels? C) brain and spinal cord A. they produce neurotransmitters B. they lack neurotransmitter receptors C. they receive communication from other neurons D. they slow down the action potential. The actual cause of the neurodegenerative component of the disease is however unclear. Methods: Participants were prospectively enrolled . likely to occur? a. pituitary gland. Neurons require continuous and abundant supplies of oxygen, and cannot survive for more than a few minutes without it. What distinguishes nerve cells and other excitable membranes (e.g., muscle cells) is that they are capable of changing their resting potential. There are two well-characterized cannabinoid receptors (CB1R and CB2R and other candidates): the central nervous system (CNS) enriched CB1R and peripheral tissue enriched CB2R with a wide dynamic range of expression levels in different cell types of human tissues. The cell body is the metabolic center of the neuron. Which of the following is not a function of astrocytes? A . likely acting upon? a) anchor neurons to blood vessels b) control the chemical environment around neurons c) Provide the defense for the CNS d) support and brace neurons e) guide the migration of young neurons, synapse. a. Pons Identify the neuron type described: A functional neuron type most prevalent in the CNS. d. the structure is anterior to the area. B) Group A fibers are mostly somatic sensory and motor and are the smallest in diameter. In myelinated axons the voltage-regulated sodium channels are concentrated at the nodes of Ranvier. 1.Introduction. b. expect to find increased blood flow. It is composed of densely packed cells. a. b. motor fibers that conduct nerve impulses from CNS to skeletal muscles. c. pons. (d) All of these are characteristic of neurons. 13. c. hindbrain. Which of the following is not a characteristic of ion channels? A. Sensory. Friedreich's ataxia is a rare disease that affects your central nervous system. 32. Responding to brain injury is an important function of astrocytes. There are three types of neurons. d. cerebral blood vessels. 62. Cerebrospinal is located in the following structures except: researcher would: See Page 1. The cells communicate by sending signals between different parts of the brain, and the neurons can interface with gray matter nuclei. Harvard University Laboratory Technician Job in Cambridge, MA | Glassdoor Some ions are prevented from moving down their concentration gradients by ATP-driven pumps.