Integrins - Study guides, Class notes & Summaries

Compare and contrast how positive and negative feedback mechanisms are used to maintain homeostasis. Use these concepts to describe: a. The maintenance of blood glucose levels b. The release of platelets to form blood clots Ans: a. negative feedback - insulin is produced by the pancreas b. positive feedback - first platelets bind to site attracting more platelets to bind What does it mean if an organism is an ectotherm? Give an example. Ans: external source of body heat; ex: snakes W...

MCAT Biochemistry Latest Updated 2024 With Complete Solutions what kind of acids are amino acids? - weak polyprotic acids - amphoteric - acidic pH: fully protonated - basic pH: fully protonated - neutral pH: zwitterion Explain a peptide bond formation - condensation (dehydration rxn) - nucleophilic amino group attacks electrophilic carbonyl group. - peptide bonds broken by hydrolysis structural proteins - collagen, elastin, keratin, actin, tubulin motor proteins - capable of force ...

1. What are the three major constitutes of plasma membranes and how are membranes of eukaryotic cells organized? - answer--cholesterol, integral membrane protein, phospholipids. Cells are enclosed by a semipermeable membrane. The membrane serves as a barrier and regulates cell size and function. Membranes also surround intracellular structures (ex. mito, lysosomes). Within the cell (cytosol): ions, proteins, water, and many organelles. 2. There are several types of proteins in the plasma me...

WCA Test QuestionsThe epidermis is avascular (lack of blood vessels), gets oxygen supply from? - correct answer Dermis Dermal protein that is primarily composed of Type 1 which is 77-85% - correct answer Collagen dermal protein secreted by fibroblast - correct answer collagen Requires the most oxygen and sensitive to ischemia - correct answer muscles EGF - correct answer Epidermal Growth Factor a Hormone that stimulate skin cells to produce KGF - correct answer keratinocyte growth...

Light Microscope - -visible light is passed through a specimen Magnification - -ratio of image to real size Resolution - -image clarity Contrast - -difference in brightness Cell fractionation - -Takes cells apart -separate organelle -Determine function of organelles Prokaryotic Cell - -NO nucleus -DNA is unbound region (nucleoid) Eukaryotic cells - -DNA is in nucleus -membrane bound organelles -larger then prokaryotic cells The Nucleus - -Cell's genes -DNA in chromosomes Nucleolus...

Which of the following is a component of the extracellular matrix that is correctly matched with its function? A. Collagen forms tough protein fi bers that are resistant to shearing forces. B. Elastin is the principal adhesive glycoprotein in connective tissue. C. Fibronectin forms a hydrated gel to allow the ECM to resist compressive forces. D. Glycosaminoglycans allow skin and lungs to stretch without tearing. E. Laminin imparts resilience to tissues such as cartilage. - A A 32-y...

ASU BIO 100 EXAM 3 QUESTIONS AND ANSWERS RATED A+ **Describe the roles of each bodily system: Digestive** Breaks down food both mechanically and chemically. Absorbs nutrients. Eliminates undigested waste. **Describe the roles of each bodily system: Cardiovascular (respiratory and circulatory)** Transports blood to deliver oxygen and nutrients, regulates body temperature, and provides immunity. **Describe the roles of each bodily system: Immune** Fights infections, maintains homeo...

NBME PATHOLOGY EXAM WITH LATEST VERIFIED QUESTIONS AND 100% CORRECT ANSWERS GRADED A+ Apoptosis: - ANS-Programmed cell death. REQUIRES ATP. Can occur via the intrinsic or extrinsic pathways, both of which involve activation of cytosolic caspases which mediate cellular breakdown. ***Unlike necrosis, apoptosis does not involve significant inflammation. Involves eosinophilic cytoplasm, cell shrinkage, pyknosis and basophilia, membrane blebbing and karyorrhexis, and formation of apoptot...

Actin A globular protein that links into chains, two of which twist helically about each other, forming microfilaments in muscle and other contractile elements in cells. active transport Energy-requiring process that moves material across a cell membrane against a concentration difference What is a hemidesmosome? the underlying basement membrane half desmosomes keeps the epithelium from peeling away from the underlying tissue Hydrophilic water loving Hydrophobic Water fearing integral membr...

Hyperventilation leads to a decreased blood CO2 correct answers Rate of CO2 exhalation exceeds the rate of CO2 production in the cells Which of the following best describes how a shift to the right in the dissociation curve in Figure 1 results in more oxygen delivered to tissue? correct answers The distance between the curves at 100 mmHg is less than the distance between the curves at 40 mmHg In RBCs bicarbonate can exchanged for chloride in the plasma. Why do red blood cells in venous cir...