Understanding Tissues and Skin: Insights from Lab 5

Lab 5 Tissues and Skin BIO201L Student Name: Click here to enter text. Access Code (located on the lid of your lab kit): Click here to enter text. Lab Report Format Expectations Utilize college level grammar and professional formatting when completing this worksheet. Submissions without proper formatting, all required photos or sufficient responses will be rejected. Pre-lab Questions 1. What is a tissue? Click here to enter text. 2. What is the function of epithelial tissue? Click here to enter text. 3. What is the function of connective tissue? Click here to enter text. 4. What is the function of muscular tissue? Click here to enter text. 5. What is the function of nervous tissue? Click here to enter text. 6. Describe sebaceous glands, sweat glands, and hairs with regard to the function of the skin. Click here to enter text. 7. What is the function of melanin? Click here to enter text. 8. List the similarities and differences of the layers of the epidermis. Click here to enter text.

Lab 5 Tissues and Skin BIO201L EXPERIMENT 1: OBSERVATION OF MITOSIS IN A PLANT CELL Introduction Questions 1. What is the difference between simple, stratified and pseudostratified epithelial tissue? Click here to enter text. 2. What is the difference between multipolar, bipolar and unipolar neurons? Click here to enter text. 3. Does the number of cell layers or the cell shape play a role in the function of the epithelial tissue? Provide three examples. Click here to enter text.

Lab 5 Tissues and Skin BIO201L Data and Observations 1. Identify the following tissue slides . ( Hint : Use the given tissue types to find them within the online database.) ” A. Click here to enter text. B. Click here to enter text. C. Click here to enter text. D. Click here to enter text. E. Click here to enter text. F. Click here to enter text. G. Click here to enter text. H. Click here to enter text. A) Epithelial Tissue B) Epithelial Tissue C) Connective Tissue D) Connective Tissue E) Connective Tissue F) Muscular Tissue G) Muscular Tissue H) Unidentified Tissue

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Lab 5 Tissues and Skin BIO201L Results and Discussion 1. Describe the cell shape of squamous, cuboidal and columnar epithelial cells. Click here to enter text. 2. List and describe the different types of connective tissue. What similarities and differences did you notice when viewing the prepared slides? Click here to enter text. 3. What are the three components of the extracellular matrix in connective tissue? Click here to enter text. 4. What are the three types of cartilage? What are their similarities and differences? Click here to enter text. 5. What are the three types of muscular tissue? For each, describe the cell shape, the type of control (voluntary or involuntary) and the presence or absence of striations. Click here to enter text. 6. Looking at the nervous tissue, state the cell processes visible (i.e., axon) on the prepared slide. For each process, state the function. Click here to enter text.

Lab 5 Tissues and Skin BIO201L EXPERIMENT 2: MICROSCOPIC SLIDE EXAMINATION - SKIN Introduction Questions 1. List the five layers of the epidermis from most internal to most external and describe their function. Click here to enter text. 2. List the two layers of the dermis from most internal to most external and describe their function. Click here to enter text. Data and Observations 1. Label the arrows in the following slide image: A. Click here to enter text. B. Click here to enter text. C. Click here to enter text.

Lab 5 Tissues and Skin BIO201L D. Click here to enter text.

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Lab 5 Tissues and Skin BIO201L Results and Discussion 1. Determine whether the following statements pertain to the epidermis or dermis. ” Statement Epidermis or Dermis This layer consists of the papillary layer and the reticular layer. Input Composed of keratinized stratified Squamous epithelium. Input Langerhans cell and Merkel cell reside in this layer. Input Composed of dense irregular connective tissue. Input The fingerprint pattern, unique to each individual, is created in this layer. Input Outermost layer of skin. Input This layer has laminated granules and keratohyalin granules within the stratum granulosum. Input The dense supply of blood allows this layer to play a part in body temperature regulation. Input

Lab 5 Tissues and Skin BIO201L EXPERIMENT 3: OBSERVATION OF MITOSIS IN A PLANT CELL Introduction Questions 1. What is the purpose of sweat glands? Why do they produce sweat? Click here to enter text. 2. How does sweat achieve its intended purpose? Click here to enter text. Data and Observations Record your observations from the experiment below in Table 2. Table 2: Sweat Gland Distribution Body Region Sweat Glands/cm 2 Right Anterior Forearm Input Right Palm Input Right Anterior Thigh Input Right Anterior Foot Input Results and Discussion 1. What area of the body had the greatest density of sweat glands, based on your experimental results? What area had the lowest? Why do you think this is? Click here to enter text.

Lab 5 Tissues and Skin BIO201L EXPERIMENT 4: SKIN RECEPTORS Introduction Questions 1. Certain areas of the body will have a greater concentration of skin receptors. Formulate a hypothesis that aims to predict where you will find the highest and lowest density of receptors. Use what you know about skin receptors to provide reasoning that backs up your hypothesis. Click here to enter text. Data and Observations Record your caliper measurements in the table below. Table 3: Two-Point Discrimination Test Results Body Region Left-Side Caliper Measurement Right-Side Caliper Measurement Scalp Input Input Forehead Input Input Lips Input Input Front of Neck Input Input Back of Neck Input Input Shoulder Input Input Upper Arm Input Input Elbow Input Input Forearm Input Input Wrist Input Input Back of Hand Input Input Palm of Hand Input Input Tip of Thumb Input Input Tip of Index Finger Input Input

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Lab 5 Tissues and Skin BIO201L Body Region Left-Side Caliper Measurement Right-Side Caliper Measurement Tip of Middle Finger Input Input Tip of Ring Finger Input Input Tip of Pinkie Input Input Results and Discussion 1. Was your hypothesis stated in Question 1 of the introductory questions correct? If not, why do you think this is the case? Click here to enter text. 2. Which region was most sensitive to this test? Which was least sensitive? Click here to enter text. 3. Was there a difference between the measurements of the left and right side of the body? Why or why not? Click here to enter text.

Lab 5 Tissues and Skin BIO201L EXPERIMENT 5: INTRODUCTION TO THE FETAL PIG Introduction Questions 1. Why is the fetal pig an appropriate choice for this experiment? Click here to enter text. Data and Observations Take note of your observations in the table below. Ensure you provide enough detail such that you demonstrate your knowledge on the subject and that you note any features which were mentioned in the experimental procedure. The observations you state must also match the photo you provide. Table 4: External Observation of the Fetal Pig Area Observations Skin Input Head Region Input Neck Region Input Trunk Region Input Tail Region (including sex of pig) Input

Lab 5 Tissues and Skin BIO201L Insert a high resolution photo of the fetal pig you observed in the dissection tray. Your handwritten name and access code must be clearly visible in the background . Photos that are of too low resolution, that appear inauthentic, that appear edited, or that do not show the pig, dissection tray and a clearly written name and access code will be rejected.

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BIO201 Lab 5

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