Introduction:
The hair is present in every part of the human body except the lips, palm, the nipple, etc. the color and the structure of hair may vary due to age. In the sixth month of fetal development, the hair is very delicate and is termed as lanugo, during the birth time the baby has pigmented hairs which are termed as terminal hairs. The lanugo hair is replaced by the vellus hairs which get replaced during puberty. The growth of hairs consists of growth and resting phases. In the growth phase, the hair will grow in length due to the production of new cell matrix to get keratinized and die, after this the hair growth enters the resting phase the old hairs will be changed by new hairs that cause hair fall, therefore hair fall is normal.
Want to see the full answer?
Check out a sample textbook solutionChapter 5 Solutions
CONNECT FOR ANATOMY AND PHYSIOLOGY >IC
- Answer number seven do what it says.arrow_forwardWhich of the following is the process that is "capable of destroying all forms of microbial life"? Question 37 options: Surgical scrub Sterilization Chemical removal Mechanical removalarrow_forwardAfter you feel comfortable with your counting method and identifying cells in the various stages of mitosis, use the four images below of whitefish blastula to count the cells in each stage until you reach 100 total cells, recording your data below in Data Table 1. (You may not need to use all four images. Stop counting when you reach 100 total cells.) After totaling the cells in each stage, calculate the percent of cells in each stage. (Divide total of stage by overall total of 100 and then multiply by 100 to obtain percentage.) Data Table 1Stage Totals PercentInterphase Mitosis: Prophase Metaphase Anaphase Telophase Cytokinesis Totals 100 100% To find the length of time whitefish blastula cells spend in each stage, multiply the percent (recorded as a decimal, in other words take the percent number and divide by 100) by 24 hours. (Example: If percent is 20%, then Time in Hours = .2 * 24 = 4.8) Record your data in Data…arrow_forward
- What are Clathrin coated vesicles and what is their function?arrow_forwardHow is a protein destined for the Endoplasmic Reticulum (ER), imported into the ER? Be concise.arrow_forwardFind out about the organisations and the movements aimed at the conservation of our natural resources. Eg Chipko movement and Greenpeace. Make a project report on such an organisation.arrow_forward
- What are biofertilizers and mention the significancearrow_forwardPCBs and River Otters: Otters in Washington State’s Green-Duwamish River have high levels of polychlorinated biphenyls (PCBs) in their livers. PCBs can bind to the estrogen receptors in animals and disrupt the endocrine system of these otters. The PCBs seem to increase the estrogen to androgen ratio, skewing the ratio toward too much estrogen. How would increased estrogen affect the river otter population? Based on your reading of the materials in this unit, what factors can affect fertility in humans? Explain how each of the factors affecting human fertility that you described can disrupt the human endocrine system to affect reproduction.arrow_forwardOther than oil and alcohol, are there other liquids you could compare to water (that are liquid at room temperature)? How is water unique compared to these other liquids? What follow-up experiment would you like to do, and how would you relate it to your life?arrow_forward
- Selection of Traits What adaptations do scavengers have for locating and feeding on prey? What adaptations do predators have for capturing and consuming prey?arrow_forwardCompetition Between Species What natural processes limit populations from growing too large? What are some resources organisms can compete over in their natural habitat?arrow_forwardSpecies Interactions Explain how predators, prey and scavengers interact. Explain whether predators and scavengers are necessary or beneficial for an ecosystem.arrow_forward
- Nutrition Through The Life CycleHealth & NutritionISBN:9781337919333Author:Brown, Judith E.Publisher:Cengage Learning,
- Human Physiology: From Cells to Systems (MindTap ...BiologyISBN:9781285866932Author:Lauralee SherwoodPublisher:Cengage Learning