
Concept explainers
Concept introduction: The sensory receptors are the nerves which are stimulated by a physical stimulus and create nerve impulse to send information to the brain. The tactile receptors are the most numerous types of sensory receptors. These receptors are present in the skin and mucous membranes. The dendritic nerve endings of tactile receptors are either unencapsulated or encapsulated.

Answer to Problem 1DYB
Correct answer: Unencapsulated dendritic endings of sensory neurons are called free nerve endings.
Therefore, option b. is correct.
Explanation of Solution
Reason for the correct answer:
Option b. is given as “free nerve endings”.
The free nerve endings are the apex of any tactile sensory receptor and are not covered by any protective layer on their end. These receptors are found closest to the skin surface and mucus membrane. The free nerve endings are sensitive to pain and temperature stimuli.
Hence, option b. is correct.
Reasons for incorrect answers:
Option a. is given as “lamellated corpuscles”.
The lamellated corpuscles are covered by the connective tissue and specialized glial cells. They are located at the reticular layer of the dermis, soles of the feet, breasts, and the external ganglia as well as walls of the some organs. Hence, option a. is incorrect.
Option c. is given as “bulbous corpuscles”.
These nerve endings are also known as ruffini endings. These receptors are found in cutaneous tissues. These are spindle shaped neurons and have a covering layer. Hence, option c. is incorrect.
Option d. is given as “end bulbs”.
These are rounded or oval structures located at the dermis, mucous membranes of the nasal cavity, oral cavity, vagina, and the anal canal. These receptors are covered by the connective tissue and specialized glial cells. Hence, option d. is incorrect.
Hence, options a., c., and d. are incorrect.
Free nerve endings are the receptors that are unencapsulated.
Want to see more full solutions like this?
Chapter 16 Solutions
Connect APR & PHILS Access Card for Anatomy & Physiology: An Integrative Approach
- Can you described the image? Can you explain the question as well their answer and how to get to an answer to an problem like this?arrow_forwardglg 112 mid unit assignment Identifying melting processesarrow_forwardGive only the mode of inheritance consistent with all three pedigrees and only two reasons that support this, nothing more, (it shouldn't take too long)arrow_forward
- Oarrow_forwardDescribe the principle of homeostasis.arrow_forwardExplain how the hormones of the glands listed below travel around the body to target organs and tissues : Pituitary gland Hypothalamus Thyroid Parathyroid Adrenal Pineal Pancreas(islets of langerhans) Gonads (testes and ovaries) Placentaarrow_forward
- What are the functions of the hormones produced in the glands listed below: Pituitary gland Hypothalamus Thyroid Parathyroid Adrenal Pineal Pancreas(islets of langerhans) Gonads (testes and ovaries) Placentaarrow_forwardDescribe the hormones produced in the glands listed below: Pituitary gland Hypothalamus Thyroid Parathyroid Adrenal Pineal Pancreas(islets of langerhans) Gonads (testes and ovaries) Placentaarrow_forwardPlease help me calculate drug dosage from the following information: Patient weight: 35 pounds, so 15.9 kilograms (got this by dividing 35 pounds by 2.2 kilograms) Drug dose: 0.05mg/kg Drug concentration: 2mg/mLarrow_forward
- A 25-year-old woman presents to the emergency department with a 2-day history of fever, chills, severe headache, and confusion. She recently returned from a trip to sub-Saharan Africa, where she did not take malaria prophylaxis. On examination, she is febrile (39.8°C/103.6°F) and hypotensive. Laboratory studies reveal hemoglobin of 8.0 g/dL, platelet count of 50,000/μL, and evidence of hemoglobinuria. A peripheral blood smear shows ring forms and banana-shaped gametocytes. Which of the following Plasmodium species is most likely responsible for her severe symptoms? A. Plasmodium vivax B. Plasmodium ovale C. Plasmodium malariae D. Plasmodium falciparumarrow_forwardStandard Concentration (caffeine) mg/L Absorbance Reading 10 0.322 20 0.697 40 1.535 60 2.520 80 3.100arrow_forwardPlease draw in the missing answer, thank youarrow_forward
- Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSONBiology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxAnatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
- Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & CompanyLaboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education





