If a splinter penetrates the skin of the palm of the hand to the second epidermal layer from the surface, the last layer damaged is the
a. stratum granulosum. d. stratum
b. stratum basale. e. stratum spinosum.
c. stratum corneum.

Introduction:
The skin is comprised of 2 major tissue layers, the epidermis and the dermis. The epidermis is the superficial skin layer, comprising stratified epithelial squamous tissue. The multiple cell layers of the epidermis protects against the potential damage from abrasion on the skin's surface.
Answer to Problem 1RAC
The correct answer is option (d) stratum lucidum.
Explanation of Solution
Explanation/justification for the correct answer:
Option (d) stratum lucidum. The stratum lucidum in the epidermis is a thin, transparent layer of dead skin cells named for its translucent appearance under a microscope. It is easily noticeable by light microscopy only in regions of thick skin found on the hands ' palms and feet's soles. So, the correct answer is option (d).
Explanation for incorrect answer:
Option (a) stratum granulosum. A thin layer of cells in the epidermis is the stratum granulosum (or granular layer). Keratinocytes that migrate from the underlying stratum spinosum are known in this layer as granular cells. So, this is an incorrect option.
Option (b) stratum basale. The stratum basale is the deepest layer of the five layers of the epidermis, which cover the outside of the skin in mammals and is sometimes called as the stratum germinativum. So, this is an incorrect option.
Option (c) stratum corneum. Stratum corneum is the peripheral layer of the skin, comprising of keratinized cells. The stratum corneum, or the skin boundary, goes about as our first line of resistance against the outer condition. It is a compact layer of cells and lipids that has two basic capacities: it shields our bodies from microorganisms, UV harm and other assaults; and avoids natural moisture from escaping, to keep skin hydrated. So, this is an incorrect option.
Option (e) stratum spinosum. Stratum spinosum is a superficial stratum basale which consists of 8 to10 layers of multi-sided cells. As the cells in this stratum are pushed to the ground, they flattened; desmosomes break apart and fresh desmosomes form. So this is an incorrect option.
If a splinter penetrates the skin of the palm of the hand to the second epidermal layer from the surface, the last layer damaged is the stratum lucidum. Hence, the correct answer is option (d) small intestine.
Want to see more full solutions like this?
Chapter 5 Solutions
Seeley's Anatomy & Physiology
- What is this?arrow_forwardMolecular Biology A-C components of the question are corresponding to attached image labeled 1. D component of the question is corresponding to attached image labeled 2. For a eukaryotic mRNA, the sequences is as follows where AUGrepresents the start codon, the yellow is the Kozak sequence and (XXX) just represents any codonfor an amino acid (no stop codons here). G-cap and polyA tail are not shown A. How long is the peptide produced?B. What is the function (a sentence) of the UAA highlighted in blue?C. If the sequence highlighted in blue were changed from UAA to UAG, how would that affecttranslation? D. (1) The sequence highlighted in yellow above is moved to a new position indicated below. Howwould that affect translation? (2) How long would be the protein produced from this new mRNA? Thank youarrow_forwardMolecular Biology Question Explain why the cell doesn’t need 61 tRNAs (one for each codon). Please help. Thank youarrow_forward
- Molecular Biology You discover a disease causing mutation (indicated by the arrow) that alters splicing of its mRNA. This mutation (a base substitution in the splicing sequence) eliminates a 3’ splice site resulting in the inclusion of the second intron (I2) in the final mRNA. We are going to pretend that this intron is short having only 15 nucleotides (most introns are much longer so this is just to make things simple) with the following sequence shown below in bold. The ( ) indicate the reading frames in the exons; the included intron 2 sequences are in bold. A. Would you expected this change to be harmful? ExplainB. If you were to do gene therapy to fix this problem, briefly explain what type of gene therapy youwould use to correct this. Please help. Thank youarrow_forwardMolecular Biology Question Please help. Thank you Explain what is meant by the term “defective virus.” Explain how a defective virus is able to replicate.arrow_forwardMolecular Biology Explain why changing the codon GGG to GGA should not be harmful. Please help . Thank youarrow_forward
- Stage Percent Time in Hours Interphase .60 14.4 Prophase .20 4.8 Metaphase .10 2.4 Anaphase .06 1.44 Telophase .03 .72 Cytukinesis .01 .24 Can you summarize the results in the chart and explain which phases are faster and why the slower ones are slow?arrow_forwardCan you circle a cell in the different stages of mitosis? 1.prophase 2.metaphase 3.anaphase 4.telophase 5.cytokinesisarrow_forwardWhich microbe does not live part of its lifecycle outside humans? A. Toxoplasma gondii B. Cytomegalovirus C. Francisella tularensis D. Plasmodium falciparum explain your answer thoroughly.arrow_forward
- Select all of the following that the ablation (knockout) or ectopoic expression (gain of function) of Hox can contribute to. Another set of wings in the fruit fly, duplication of fingernails, ectopic ears in mice, excess feathers in duck/quail chimeras, and homeosis of segment 2 to jaw in Hox2a mutantsarrow_forwardSelect all of the following that changes in the MC1R gene can lead to: Changes in spots/stripes in lizards, changes in coat coloration in mice, ectopic ear formation in Siberian hamsters, and red hair in humansarrow_forwardPleiotropic genes are genes that (blank) Cause a swapping of organs/structures, are the result of duplicated sets of chromosomes, never produce protein products, and have more than one purpose/functionarrow_forward
- Anatomy & PhysiologyBiologyISBN:9781938168130Author:Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark WomblePublisher:OpenStax College
- Human Biology (MindTap Course List)BiologyISBN:9781305112100Author:Cecie Starr, Beverly McMillanPublisher:Cengage Learning


