Human Physiology
15th Edition
ISBN: 9781259864629
Author: Fox, Stuart Ira
Publisher: Mcgraw-hill Education,
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Textbook Question
Chapter 1, Problem 8RA
In a negative feedback loop, the effector produces changes that are
a. in the same direction as the change produced by the initial stimulus.
b. opposite in direction to the change produced by the initial stimulus.
c. unrelated to the initial stimulus.
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Which 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.
In a negative feedback loop, the effector produces changes that are a. in the same direction as the change produced by the initial stimulus. b. opposite in direction to the change produced by the initial stimulus. c. unrelated to the initial stimulus.
Which 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.
Chapter 1 Solutions
Human Physiology
Ch. 1 - How has the study of physiology aided, and been...Ch. 1 - Describe the steps involved in the scientific...Ch. 1 - Describe the different types of trials a new drug...Ch. 1 - Define homeostasis and describe how this concept...Ch. 1 - Define negative feedback and explain how it....Ch. 1 - Prob. 4CPCh. 1 - Explain how the secretion of a hormone is...Ch. 1 - List the four primary tissues and describe the...Ch. 1 - Compare and contrast the three types of muscle...Ch. 1 - Describe the different types of epithelial...
Ch. 1 - Prob. 7aCPCh. 1 - Describe the different types of connective tissues...Ch. 1 - State the location of each type of primary tissue...Ch. 1 - Describe the functions of nervous, muscle, and...Ch. 1 - Describe the functions of the epidermis and...Ch. 1 - Prob. 9CPCh. 1 - Glands are derived from...Ch. 1 - Cells joined tightly together are characteristic...Ch. 1 - Cells are separated by large extracellular spaces...Ch. 1 - Blood vessels and nerves are usually located...Ch. 1 - Most organs are composed of...Ch. 1 - Sweat is secreted by exocrine glands. This means...Ch. 1 - Which of these statements about homeostasis is...Ch. 1 - In a negative feedback loop, the effector produces...Ch. 1 - A hormone called parathyroid hormone acts to help...Ch. 1 - Which of these consists of dense parallel...Ch. 1 - Prob. 11RACh. 1 - Prob. 12RACh. 1 - Describe the structure of the various epithelial...Ch. 1 - Compare bone, blood, and the dermis of the skin in...Ch. 1 - Describe the role of antagonistic negative...Ch. 1 - Using insulin as an example, explain how the...Ch. 1 - Describe the steps in the development of...Ch. 1 - Why is Claude Bernard considered the father of...Ch. 1 - Prob. 19RACh. 1 - Prob. 20RACh. 1 - Why are interactions between the body-fluid...Ch. 1 - Prob. 22RACh. 1 - Give examples of adult stem cells and explain...Ch. 1 - Prob. 24RACh. 1 - Prob. 25RACh. 1 - Prob. 26RA
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- In describing a positive feedback loop, which of the following would be true? a) the sensor and control center are always the same b) the effector signals the control center to shut off the initial stimulus c) the effect shuts off the initial stimulus d) the effect amplifies the initial stimuarrow_forwardIf the response to a stimulus is a change from a negative potential to a less negative potential, the change is called: stimulus response Repolarization Depolarization Stimulus recoveryarrow_forwardDefine the term adequate stimulusarrow_forward
- Which of the following rows correctly describe the direction of a nerve impulse in a reflex arc? a. Receptor → spinal cord → brain → effector b. effector → motor neuron → spinal cord → brain → sensory neuron → receptor c. sensory neuron → spinal cord → motor neuron → effector d. sensory neuron → brain → motor neuron → effectorarrow_forwardWhich 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.arrow_forwardDescribe the relationship between stimulus intensity, frequency of action potentials, and the amount of neurotransmitters released. What term describes this relationship?arrow_forward
- List the physiological events that occur between delivery of the stimulus and the start of the recordedresponse (i.e. during the latent period).arrow_forwardWhich of the following is the correct definition of positive feedback? a The process by which the body neglects homeostasis. b A mechanism in which the body's response to a stimulis opposes the stimulus. c A mechanism whereby the body responds to a stimulus by acting to enhance the stimulus d The dynamic equilibrium maintained by an integrating center which causes an effector to respond to the stimulus received by the receptor.arrow_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_forward
- What is meant by the modality of a stimulus? Give someexamplesarrow_forwardWhich of the following describes a stretch reflex?A. The receptor detects that a muscle is stretched, and sends a signal to contract it reflexively.B. The receptor detects that a muscle is contracted, and sends a signal to stretch it reflexively.arrow_forwardThe conversion of an environmental stimulus into a nerveimpulse is called sensorya. conduction.b. conversion.c. transduction.d. transformation.arrow_forward
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