BIOL250 W11 QUIZ8

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American Military University *

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Biology

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Jan 9, 2024

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Question 1 4 / 4 points Once an action potential is initiated in a neuron, that depolarization then is __________ . Question options: propagated. continuously conducted in an unmyelinated nerve fiber. conducted in a saltatory manner in a myelinated nerve fiber. blocked. A, B, and C are correct Hide question 1 feedback Good work; your answer is correct! Question 2 4 / 4 points Which of the following cavities contains a component of the central nervous system? Question options: cranial abdominal thoracic pelvic peritoneal Hide question 2 feedback Good work; your answer is correct! Question 3 0 / 4 points Which part of a neuron transmits an electrical signal to a target cell? Question options: dendrites axon ganglion cell body soma Hide question 3 feedback The axon is responsible for transmitting electrical signals to target cells. Question 4 4 / 4 points A synapse is the location where the axon of a neuron connect with another neuron or a muscle fiber. The following characteristic(s) are always present in chemical synapses: Question options: presynaptic element neurotransmitter (packaged in vesicles)

synaptic cleft receptor proteins All the above are present. Hide question 4 feedback Good work; your answer is correct! Question 5 4 / 4 points Various chemical methods work together to maintain what is called the normal resting membrane potential difference between the inside and the outside of each neuron. This resting membrane potential is ______. Question options: -30 mV +70 mV 0 mV -70 mV +30 mV Hide question 5 feedback Good work; your answer is correct! Question 6 4 / 4 points Which part of a neuron contains the nucleus? Question options: soma synaptic cleft synaptic end bulb dendrite axon Hide question 6 feedback Good work; your answer is correct! Question 7 4 / 4 points The threshold membrane potential difference is ________. Question options: -55 mV +30 mV -60 mV -30 mV 0 mV Hide question 7 feedback

Good work; your answer is correct! Question 8 4 / 4 points Which of these locations is where the greatest level of integration is taking place in the example of testing the temperature of something? Question options: skeletal muscle spinal cord thalamus cerebral cortex None of the above. Question 9 4 / 4 points The _________ nervous system is responsible for conscious perception and voluntary motor responses. The _________ nervous system is responsible for involuntary control of the body. Question options: central; peripheral peripheral; central somatic; autonomic autonomic; somatic None of the above Hide question 9 feedback Good work; your answer is correct! Question 10 4 / 4 points The two general types of cells found in the nervous system are _______ and ________. Question options: Neurons; nodes of Ranvier Neurons; glial cells Neurons; target cells Astrocytes; oligodendrocytes Glial cells; myelin cells Hide question 10 feedback Good work; your answer is correct! Question 11 4 / 4 points The following types of glial cells (supportive cells) are responsible for helping to synthesize myelin, the insulation of axons: _____________ in the central nervous system (CNS) and ____________ in the peripheral nervous system (PNS.) Question options:

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Oligodendrocytes; Schwann cells Neurons; astrocytes Neurons; Schwann cells Microglia; astrocytes Schwann cells; Oligodendrocytes Hide question 11 feedback Good work; your answer is correct! Question 12 4 / 4 points If a thermoreceptor is sensitive to temperature sensations, what would a chemoreceptor be sensitive to? Question options: light sound molecules vibration Both C and D are correct. Hide question 12 feedback Good work; your answer is correct! Question 13 4 / 4 points Which part of a neuron transmits an electrical signal to a target cell? Question options: Axon Cell body Dendrites Soma Hide question 13 feedback Correct. This can be found in the OpenStax Overview of Anatomy and Physiology section. Section 12.1. Question 14 4 / 4 points The nervous system of our bodies is very, very complex. According to your author, how should we work our way through this in order to understand its structure? Question options: Begin by learning about the individual cells of the nervous system. Begin by learning about the chemistry of the nervous system. Begin by first memorizing the names of every individual structure of the system.

Begin by learning the large divisions of the nervous system and work through to a more in-depth understanding. Hide question 14 feedback Good work; your answer is correct! Question 15 4 / 4 points The nervous system is involved in receiving __________ about the environment around and then generating __________ to that information. Question options: responses; input information; responses integration; responses responses; integration information; input Hide question 15 feedback Good work; your answer is correct! Question 16 4 / 4 points Which of the following statements is/are correct? Question options: The white matter of the CNS is made up of bundles of axons. The gray matter of the CNS is made up of numerous neuron cell bodies. The white matter of the PNS is made up of ganglia. The gray matter of the PNS is made up of spinal nerves. Both A and B are correct. Question 17 4 / 4 points What neurotransmitter is released at the neuromuscular junction? Question options: norepinephrine serotonin dopamine acetylcholine pre-synaptic Question 18 4 / 4 points Sensory neurons have nerve endings in the skin that can sense a stimulus. Which of the following are examples of sensory neurons in the skin? Question options:

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