WHAT IS LIFE? ACHIEVE 1 TERM ACCESS CODE
5th Edition
ISBN: 9781319516116
Author: PHELAN
Publisher: MAC HIGHER
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Chapter 24, Problem 1MC
Summary Introduction
Introduction:
The animal nervous system is the organ system that controls the activities of the organism, and its response to external stimuli.
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Which of the following statements correctly describes the all-or-none principle?
a. A neuron produces a complete response or no response to a stimulus.
b. A stimulus depolarizes all of the neurons in the body or none at all.
c. A neuron produces a complete response to every stimulus.
d. A stimulus repolarizes all of the neurons in the body or none at all.
1.) What is the general understanding of biological processes, including depolarization, nerve impulse transmission and synaptic transmission
2.) what is integrating a sense (ie. vision hearing etc.) into knowledge of reflex arcs and then arranging the events in order they would occur
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Please note these are all one question group and should be answered as such!
Which of the following statements accurately defines epineurium?
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Fluid-filled space at a synapse through which neurotransmitters diffuse
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A vesicle containing neurotransmitters in the axon terminal of a neuron
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The CT sheath that binds together the groups of fascicles, blood vessels, and lymphatic vessels in a peripheral nerve
D.
The branch of the ANS that adapts the body for rest and digestion
Which of the following statements accurately defines sacral plexus?
A.
The ventral rami of C1–C4 (and a small contribution from C5) that serve the head and neck
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The ventral rami of L1–L4 that serve the pelvis and lower limb
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The ventral rami of C5–T1 that serve the upper limb
D.
The ventral rami of L4–S4 that serve the pelvis and lower limb
Chapter 24 Solutions
WHAT IS LIFE? ACHIEVE 1 TERM ACCESS CODE
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- A stimulus causes a change in permeability of neural membranes, which begins the process of transmitting an impulse. If the stimulus reaches the threshold potential of a neuron, an action potential is generated. Select the numbers of the statements below that occur once the threshold potential is reached. 1. Sodium ions flow into the neuron. 2. Sodium ions flow out of the neuron. 3. The membrane potential becomes positive. 4. The membrane potential becomes negative. 5. Voltage-gated potassium channels open. 6. Voltage-gated potassium channels close. 7. Potassium ions flow into the neuron. 8. Potassium ions flow out of the neuron. Place the numbers in order from the first event to the last event: andarrow_forwardWhich of the following statements about the functional divisions of the nervous system is false?a. Somatic sensory neurons carry signals from a range of sources like skeletal muscles, the skin, and special sensory organs.b. Visceral sensory neurons carry signals from organs such as the heart and kidneys to the spinal cord and brain.c. Somatic motor neurons regulate involuntary secretions from glands and the contraction of smooth and cardiac muscles.d. The autonomic nervous system is a key regulator of homeostasisin the body.arrow_forwardWhich of the following is a correct statement of the all-or-none principle? Select one: U a. A hyperpolarized membrane always results in the production of an action potential b. When a stimulus is applied, it triggers an action potential in the membrane O C. Action potentials occur in all neurons if a stimulus is applied that lowers the membrane potential d. A given stimulus either triggers a typical action potential or does not produce one at allarrow_forward
- Compare and contrast the nervous system organization inarthropods and vertebrates. What are their functional similaritiesand differences?arrow_forwardWhich of the following statements about the intensity of a nerve response is true? a. A stimulus reaching the threshold level may or may not propagate a nerve impulse. b. A stimulus resulting in a greater voltage shift will result in a stronger nerve impulse and increased sense of perception in the brain. c. All stimuli, regardless of the strength, will always generate a nerve impulse. d. A small voltage shift and a large voltage shift will yield the same nerve impulse as long as the stimulus reaches the threshold level.arrow_forwardWhich.of the following statements is WRONG? Select one: O a. Nerve cells have excitable membranes O b. Nerve cells typically have one axon and several dendrites O C. Nerve cells can contact skeletal muscle cells O d. Nerve cells can only be found, in humans (or mice), in the central nervous system O e. Nerve cell bodies in the central nervous system are found in the grey matter Which of the following statements is NOT true: Select one: O a. Nerve cells typically communicate with each other at synapses Ob. Synaptic communication between nerve cells involves a soluble, chemical signal OC. Synaptic communication between nerve cells is dependent upon regulated exocytosis. O d. Synaptic communication can also occur if calcium ions are removed from the extracellular fluid.arrow_forward
- In convergent pathways,a. the response of the postsynaptic neuron depends on the summationof EPSPs and IPSPs.b. a smaller number of presynaptic neurons synapse with a largernumber of postsynaptic neurons.c. information transmitted in one neuronal pathway can go into twoor more pathways.d. All of these are correct.arrow_forwardYou have to identify the following:1. The negative feedback condition/mechanism2. The four components of a negative feedbackloop:A. stimulusB. sensorC. control centerD. effector3. Explain what would happen to eachcomponent if a secretion became too great.arrow_forwardWhich of the following statements about the intensity of a nerve response is true? Select one: a. A stimulus reaching the threshold level may or may not propagate a nerve impulse. b. A small voltage shift and a large voltage shift will yield the same nerve impulse as long as the stimulus reaches the threshold level. c. All stimuli, regardless of the strength, will always generate a nerve impulse. d. A stimulus resulting in a greater voltage shift will result in a stronger nerve impulse and increased sense of perception in the brain.arrow_forward
- Post-synaptic receptors located on the membrane of skeletal muscle cells allow the muscle cells/fibers to respond to the neural-stimulus. What is the name of the receptors located on the post-synaptic membrane of the muscle cells (you can't find the answer in the textbook; you have to do some research)? 22. 26. A. beta receptors muscle contr alon is actually called The B. alpha receptors C. muscarinic receptorsry D. nicotinic receptorsarrow_forwardThe reflex arc is the fastest way the body has to move a body part from danger or away from the source of pain. Have you ever noticed your own reflex response? Did you notice that you felt the pain after you yanked your hand away from the source of pain? Which is the sequence of structures involved in a reflex response? a. motor neurons → effectors → brain → sensory neurons → interneurons b. effectors → sensory neurons → brain → motor neurons c. sensory neurons → interneurons → motor neurons → effectors d. sensory neurons → motor neurons → interneurons → effectorsarrow_forwardMany neurotransmitters trigger depolarisation by binding their receptors and gating an ion channel that allows Nat influx. What happens if a neurotransmitter such as GABA, binds its receptor, gating a chloride channel (CI)? Select the (one) CORRECT answer. O a. The neuron becomes depolarised. Ob. The membrane potential does not change O c. The neuron becomes hyperpolarised O d. The neuron fires an action potentialarrow_forward
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