Concept explainers
_____ 1. Unencapsulated, terminal endings of dendrites of sensory neurons are called
- a. lamellated corpuscles.
- b. free nerve endings.
- c. bulbous corpuscles.
- d. end bulbs.

Introduction:
The un encapsulated tactile receptors are the tips or apex of sensory neurons which are uncovered. There are three types of unencapsulated nerve receptors: free nerve endings, root hair plexuses, and tactile discs.
Answer to Problem 1DYKB
Correct answer:
Free nerve endings are the tactile receptors which are unencapsulated on the apex.
Therefore, option (b) is correct.
Explanation of Solution
Reason for the correct statement:
Option (b) is given as “free nerve endings”. The free nerve endings are the apex of any tactile sensory receptor which is not covered by any protective layer on its end. These receptors are found very close to superficial layer of skin. The free nerve endings are sensitive to pain and temperature stimuli. These may be phasic receptor or tonic receptor.
Hence, option (b) is correct.
Reasons for incorrect statements:
Option (a), is given as “lamellated corpuscles”.
These receptors are found on the skin of fingers which is sensitive to touch and pressure. These are oval in shape and the apex of receptor is covered with a protective layer. Hence, it is incorrect
Option (c), is given as “bulbous corpuscles”.
These nerve endings are also called as ruffini endings. These receptors are found in cutaneous tissues. These are spindle shaped neurons and have a covering layer. Hence, it is incorrect.
Option (d), is given as “end bulbs”.
These are rounded or oval structures found at the nerves fiber endings. These receptors are sensitive to touch, pain and cold. These receptors are covered with a protective layer. Hence, it is incorrect.
Hence, options (a), (c), and (d) are incorrect.
Free nerve endings are the receptors which are unencapsulated. Lamellated corpuscles, bulbous corpuscles, and end bulbs are the nerve ends which contain a protective covering on their tips.
Want to see more full solutions like this?
Chapter 16 Solutions
ANATOMY AND PHYSIOLOGY: AN INTEGRATIVE A
- Plekhg5 functions in bottle cell formation, and Shroom3 functions in neural plate closure, yet the phenotype of injecting mRNA of each into the animal pole of a fertilized egg is very similar. What is the phenotype, and why is the phenotype so similar? Is the phenotype going to be that there is a disruption of the formation of the neural tube for both of these because bottle cell formation is necessary for the neural plate to fold in forming the neural tube and Shroom3 is further needed to close the neural plate? So since both Plekhg5 and Shroom3 are used in forming the neural tube, injecting the mRNA will just lead to neural tube deformity?arrow_forwardWhat are some medical issues or health trends that may have a direct link to the idea of keeping fat out of diets?arrow_forwardwhat did charles darwin do in sciencearrow_forward
- fa How many different gametes, f₂ phenotypes and f₂ genotypes can potentially be produced from individuals of the following genotypes? 1) AaBb i) AaBB 11) AABSC- AA Bb Cc Dd EE Cal bsm nortubaarrow_forwardC MasteringHealth MasteringNu × session.healthandnutrition-mastering.pearson.com/myct/itemView?assignment ProblemID=17396416&attemptNo=1&offset=prevarrow_forward10. Your instructor will give you 2 amino acids during the activity session (video 2-7. A. First color all the polar and non-polar covalent bonds in the R groups of your 2 amino acids using the same colors as in #7. Do not color the bonds in the backbone of each amino acid. B. Next, color where all the hydrogen bonds, hydrophobic interactions and ionic bonds could occur in the R group of each amino acid. Use the same colors as in #7. Do not color the bonds in the backbone of each amino acid. C. Position the two amino acids on the page below in an orientation where the two R groups could bond together. Once you are satisfied, staple or tape the amino acids in place and label the bond that you formed between the two R groups. - Polar covalent Bond - Red - Non polar Covalent boND- yellow - Ionic BonD - PINK Hydrogen Bonn - Purple Hydrophobic interaction-green O=C-N H I. H HO H =O CH2 C-C-N HICK H HO H CH2 OH H₂N C = Oarrow_forwardFind the dental formula and enter it in the following format: I3/3 C1/1 P4/4 M2/3 = 42 (this is not the correct number, just the correct format) Please be aware: the upper jaw is intact (all teeth are present). The bottom jaw/mandible is not intact. The front teeth should include 6 total rectangular teeth (3 on each side) and 2 total large triangular teeth (1 on each side).arrow_forward12. Calculate the area of a circle which has a radius of 1200 μm. Give your answer in mm² in scientific notation with the correct number of significant figures.arrow_forwardDescribe the image quality of the B.megaterium at 1000X before adding oil? What does adding oil do to the quality of the image?arrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
- Medical Terminology for Health Professions, Spira...Health & NutritionISBN:9781305634350Author:Ann Ehrlich, Carol L. Schroeder, Laura Ehrlich, Katrina A. SchroederPublisher:Cengage LearningHuman Physiology: From Cells to Systems (MindTap ...BiologyISBN:9781285866932Author:Lauralee SherwoodPublisher:Cengage Learning
- Comprehensive Medical Assisting: Administrative a...NursingISBN:9781305964792Author:Wilburta Q. Lindh, Carol D. Tamparo, Barbara M. Dahl, Julie Morris, Cindy CorreaPublisher:Cengage LearningFundamentals of Sectional Anatomy: An Imaging App...BiologyISBN:9781133960867Author:Denise L. LazoPublisher:Cengage Learning



