Biology: Life on Earth with Physiology (11th Edition)
11th Edition
ISBN: 9780133923001
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: PEARSON
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Question
Chapter 39.3, Problem 1TC
Summary Introduction
To determine:
The skin areas that are especially sensitive to touch, and that differ from less sensitive areas.
Introduction:
Skin is the largest organ of the body. It has three layers. Epidermis is the outer layer of the skin that provides “waterproof barrier”. The dermis, present under the epidermis and it contains connective tissue and hair follicles. The deeper layer is made up of fat and connective tissue.
Skin receptors are the small cells known as sensory neurons. When skin comes in contact with something, the sensory neurons receive signals, and these signals travels to the brain.
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Chapter 39 Solutions
Biology: Life on Earth with Physiology (11th Edition)
Ch. 39.1 - describe the structure of a typical neuron?Ch. 39.1 - Prob. 2CYLCh. 39.2 - Prob. 1TCCh. 39.2 - Prob. 1CYLCh. 39.2 - explain how an action potential in a presynaptic...Ch. 39.2 - Prob. 3CYLCh. 39.2 - Prob. 1CSCCh. 39.3 - Prob. 1TCCh. 39.3 - Prob. 1CYLCh. 39.3 - Prob. 2CYL
Ch. 39.3 - explain how the brain determines which muscles to...Ch. 39.4 - describe the anatomy of diffuse and centralized...Ch. 39.5 - John comes to the emergency room with neither...Ch. 39.5 - Prob. 1CSCCh. 39.5 - Prob. 2ETCh. 39.5 - At least two commercial companies, No Lie MRI and...Ch. 39.5 - Prob. 1HYEWCh. 39.5 - distinguish between the central and peripheral...Ch. 39.5 - Prob. 2CYLCh. 39.5 - label diagrams of the human brain and spinal cord,...Ch. 39.5 - Prob. 4CYLCh. 39.5 - Prob. 5CYLCh. 39.5 - Prob. 2CTCh. 39.5 - Prob. 1CSRCh. 39 - Prob. 1MCCh. 39 - Neurotransmitters are typically released by a a....Ch. 39 - Automatic bodily functions such as breathing and...Ch. 39 - Prob. 4MCCh. 39 - Prob. 5MCCh. 39 - Prob. 1FIBCh. 39 - Prob. 2FIBCh. 39 - Prob. 3FIBCh. 39 - Prob. 4FIBCh. 39 - Prob. 5FIBCh. 39 - Prob. 6FIBCh. 39 - Prob. 1RQCh. 39 - Prob. 2RQCh. 39 - What are the four elements of a neuronal pathway,...Ch. 39 - Prob. 4RQCh. 39 - Prob. 5RQCh. 39 - Prob. 6RQCh. 39 - Explain the differences between short-term memory...Ch. 39 - Prob. 1ACCh. 39 - Prob. 2AC
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- Match the sensory receptor with its stimulus. Detects discriminative touch, located in dermis Detects deep pressure and vibration, located in dermis Detects fine touch, located in epidermis Detects stretch and movement, located in ligaments, dermis, and hypodermis 1. Merkel cells 2. Tactile corpuscles 3. Ruffini endings 4. Lamellated corpusclesarrow_forwardBased on the ORGANIZATION of neurons, why are some areas of skin more sensitive than othersarrow_forwardWhat organs gives our body the sense of the touch,protects it, and helps keep it at it keep it at just the right temperature?arrow_forward
- In which layer(s) is (are) touch and pressure receptors found? epidermis only epidermis and dermis dermis only dermis and hypodermis only epidermis, dermis, and hypodermisarrow_forwardWhen people are tickled, light touch receptors are activated, causing a range of different responses, including squirming or movement away from the stimulus. Match the step in the tickle response homeostasis loop with the correct labelarrow_forwardGiven that touch receptors are not uniformly distributed on the body surface, name two sites where the highest density of receptors are found.arrow_forward
- Which of the following correctly describes receptors in the skin? Select one: O a. All receptor types are spread uniformly throughout dermal tissue. Ob. Pacinian corpuscles, Ruffini endings, and Krause end bulbs detect pain. O c. One type of nerve cell detects both hot and cold. O d. Temperature receptors are free nerve endings in the dermis. Oe. Meissner corpuscles and Merkel disks detect fine touch.arrow_forwardAfter spinning in an office chair and then standing up quickly, you notice that the room is still spinning even though your head rotation has ceased. Which option best explains this phenomenon? Hair cells release a small amount of neurotransmitter at rest. The continued depolarization of hair cells within the utricle and saccule. Fluid continues to circulate through the semicircular canals. Two of the above.arrow_forwardProcedure: Two-point threshold Test your partner’s ability to recognize the difference between one or two points of skin being stimulated simultaneously. To do this, follow these steps: Have your partner place a hand with the palm up on the table and close his or her eyes. Hold the tips of a forceps tightly together and gently touch the skin of your partner’sindex finger. Ask your partner to report if it feels like one or two points are touching the finger. Allow the tips of the forceps to spread so they are 1 mm apart, press both points againstthe skin simultaneously, and ask your partner to report as before. Repeat this procedure, allowing the tips of the forceps to spread more each time untilyour partner can feel both tips being pressed against the skin. The minimum distancebetween the tips of the forceps when both can be felt is called the two-point threshold. As soon as you are able to distinguish two points, two separate receptors are beingstimulated instead of only one…arrow_forward
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