General Cutaneous Sensations

2) Why are onion root tip and whitefish blastula areas that are ideal to view mitosis?

Martini, Frederic, Judi L. Nath, and Edwin F. Bartholomew.Fundamentals of Anatomy & Physiology. 9th ed. San Francisco, CA: Benjamin Cummings, 2012. Print.

* Sensations: The cutaneous sensations like touch, pressure, vibration, pain, cold, hot, etc, are felt by the skin.

A mechanoreceptor in the papillary layer of the dermis that responds to fine touch is a

People and other vertebrate creatures use specific tactile neurons to identify temperature, weight, and other physical jolts on the skin. These neurons are situated in the spinal segment and are associated with the skin

2. Discuss the biological processes that explain why peak contractile force changes with different stimulus strengths.

9. Pacinian Corpuscles connective tissue wrapped around a nerve ending located in the deep layers of skin.

The somatosensory system has to do with touch, pressure, pain, temperature, movement, and vibrations from muscles, joints, and skin. Uit sends sensations through the spinal cord, to the brainstem, then the thalamic relay nuclei to the parietal lobe that houses the sensory cortex.

Please fill out this report and submit it to the dropbox. Do not hand in your own form. It will not be graded and you will receive a zero for the lab.

Assess sensory awareness (e.g. cold from hot, dull from sharp, body part and joint sensation).

Instructions: Read chapter 3 in your textbook and review the lecture notes and study resources provided by your instructor. Type your answer in the answer block provided for each question. Answer blocks should expand as you type. If you experience difficulty typing in the provided answer blocks, you may type your answers in a new document. Save a copy of the completed activity to your computer for your records. Although this activity is not graded, your instructor reserves the right to require students to submit their completed work at any time throughout the semester.

Tortora, G. J., & Nielsen, M. T. (2015). Principles of human anatomy (13th ed.). New York:

4. Which of the following directly or indirectly determines the amount of neurotransmitter released at the axon terminal of the sensory neuron? You correctly answered: d. All of the above play a role in determining the amount of

Somatosensation is the collective sense of touch which enables us to feel our environment through the specialized receptors in our skin. While in primates, the glabrous hairless skin of the hand palm and fingers serves as sensory organ to palpate objects and obtain tactile information, rodents use their whiskers, organized in a series of rows and columns on the whisker pad located on each side of the snout (Fig.X). Rodent whiskers acquire somatosensory information by their deflection onto objects in the environment, like the digits of the human, they obtain information regarding their shape, texture and location. Somatosensation is an active process involving sensory/motor systems, where in humans a hand will press an object of interest in order to feel its textile features, the rodent macrovibrassae (whisker) will position itself in space, scanning the environment in a series of timed protractions and retractions cycles (5-10Hz). The interruption of the whisking cycle caused by the contact of a whisker onto an object provide the necessary spatio-temporal information for the construction of a sensory percept. A whisker touch contains numerous information carried out by the amplitude of the whisker deflection, the direction, duration, accelation/decelaration on contact, frequency of the contact, force along the axial shaft and resonance frequency of the whisker.