Bio 270 hynd - Study guides, Class notes & Summaries

processing of peptide hormones - ️️1. preprohormones are synthesized from rER and migrate to Golgi in membrane bound vesicles 2. while in ER and golgi, preprohormones are processed into prohormones followed by active hormones 3. golgi packages and labels hormones into secretory vesicles that are stored in cytoplasm until appropriate signal 4. upon signal, vesicle membrane fuses with plasma membrane and peptide hormone is exocytosed major processes the endocrine system can regulate in...

Steroid and thyroid hormones bind to target cells' _____________________ receptors - ️️intracellular... because they are lipophilic/hydrophobic and easily penetrate the lipid membrane of target cell Once formed, (steroids/peptides) immediately diffuse through plasma membrane to reach blood - ️️steroids (Steroids/Peptides) dissolve in blood - ️️Peptides, steroids cannot since they are hydrophobic Only the (bound/unbound) hormones are active and capable of binding with target...

Types of Muscle Tissue - ️️1) Skeletal 2) Cardiac 3) Smooth Extrinsic controls - ️️come from outside the organ - neural and hormonal control of low blood pressure Two components of extracellular fluid - ️️Plasma & Interstitial Fluid Homeostasis - ️️the maintenance of a relatively stable living environment - essential for survival and function of all cells Function depends on - ️️Structure Extracellular fluid - ️️fluid environment in which cells live (fluid outsid...

layers of the eye - ️️Fibrous (cornea/sclera), vascular/nourishing (choroid/iris), sensory (retina) blood brain barrier - ️️capillaries sealed with tight junctions to prevent bad stuff from getting to the brain Wernicke's area of brain - ️️Language comprehension, sensory Oligodendrocytes - ️️Myelin sheath of CNS Microglia - ️️trashcans of brain, eat dead micro and neurons ependymal - ️️lining of ventricles (brain) schwann c Astrocytes - ️️glue that holds ne...

Which of following is true regarding Co2 a. It can bind with hemoglobin b. it can be found dissolved in our blood c. 20x more soluble than O2 d. All of above - ️️d. All of above ______________ is the main determinant of # of Hb binding sites - ️️ What component of hemoglobin actually binds the oxygen? - ️️Fe+ Since the blood goes leaves the lungs with pO2 =100, what does this mean for its affinity? - ️️Almost fully saturated (around ~ 97%) What does the plateau portion o...

Hynd Bio 270 Lab Practical | questions plus answers | Updated!! Put the six steps of the Scientific Method in order of their occurrence. ** Answ** 1)Observe 2)Question 3)Hypothesize 4)Experiment 5)Interpret results 6)Conclude The variable over which the experimenter has control is the __________________ variable. ** Answ** independent

Which statement about the plasma membrane is not true? - ️️- serves as mechanical barrier to hold in contents of cell - selectively controls movement of molecules between the extracellular fluid and cytoplasm - ****barrier that surrounds blood vessels and separates blood plasma from interstitial fluid**** - contains proteins that provides for various membrane functions If solution A has a higher concentration of solute particles than solution B and if these solutions are separated by...