BIOH111

BIOH111 PLASMA MEMBRANE STRUCTURE AND FUNCTION EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS GRADED A++ What is a lipid bilayer? Biological membrane composed of phospholipids. What are the main components of a lipid bilayer? Phospholipids, cholesterol, and glycolipids. What is the function of a lipid bilayer? To separate areas of a cell with different conditions. What is the composition of phospholipids? 75% of the molecule, with hydrophilic heads and hydrophobic tails. What is t...

BIOH111 - CELLULAR LEVEL OF ORGANISATION: PLASMA MEMBRANE EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS GRADED A++ LATEST UPDATE Integral/Transmembrane Proteins (Structure) Firmly embedded in cell membrane extend through the lipid bilayer Hydrophobic and hydrophilic parts Integral/Transmembrane Proteins (Function) Three isolated functions 1. Ion Channel 2. Transporter 3. Receptor Three shared functions: 1. Cell Identity Maker 2. Linker 3. Enzyme Peripheral Proteins (Struct...

BIOH111 SESSION 1 HOMEOSTASIS, CELL ORGANISATION & FUNCTION OF ORGANELLES EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS GRADED A++ LATEST UPDATE Levels of organisation 1. Chemical 2. Cellular 3. Tissue 4. Organ 5. System The chemical level atoms (units of matter participating in chemical reactions) & molecules (two or more atoms joined together) Cells Basic structural and functional units of an organism Tissues groups of similarly specialised cells and substances surrounding ...

BIOH111 FINAL EXAM - NERVOUS SYSTEM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS 100% GUARANTEED PASS Trigger zone area where nerve impulses arise Ganglia (ganglion) Mass nervous tissue consisting of neuron cell bodies in PNS Axon Structure that propagates nerve impulse to neuron, muscle fibre or gland cell Neuroglia Cell in nervous system that can multiply & divide. Support & protect neurons. Smaller than neurons, more numerous, compose half of CNS. Neuroglia of the CNS Astrocytes...

BIOH111 - ENDOCRINE SYSTEM EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS Lipid-soluble hormone transport & entry to cell - Travel through blood bound to transport proteins - Molecule diffuses from blood through plasma membrane into cell (passive) Water-soluble hormone transport & entry to cell - Circulate free in blood stream - Bind to receptors on cell Lipid-soluble hormone examples - Steroid hormones - Thyroid hormones (T3 T4) - Nitric oxide Water-soluble hormone examples - ...

BIOH111 - FINAL EXAM PREP QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS GRADED A++ The sarcoplasmic reticulum, in a relaxed muscle, stores which ion? Calcium. The nervous system contains neurons and neuroglia. Which neuroglia function as a phagocyte-like cell? Microglia. Endorphins belong to which class of neurotransmitters? Neuropeptide class. Which gland is found on each side of the trachea and releases hormones involved in metabolism and regulation of calcium blood level? Thyroid gl...

BIOH111 NERVOUS SYSTEM NEUROTRANSMITTERS EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS GRADED A++ ACh Type: Small molecule substance Location: PNS = NMJ CNS = learning/memory/alertness EPSP = increased muscular activity IPSP = decreased mental activity during increased muscular activity Dopamine Type: Monoamine Location: CNS = hypothalamus; pleasure, addiction, skeletal muscle tone IPSP = no reaction/results in relaxation E/Adr Type: Monoamine Location: CNS ANS:...

BIOH111 CELL CYCLE EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS GRADED A++ LATEST UPDATE What happens during the G1 phase? Cell duplicates organelles and cytosolic components. What is the G0 phase? Phase where cells remain in G1 for a very long time and possibly never divide again. What happens during the S phase? Replication of DNA and centrosomes. What happens during the G2 phase? Cell growth and enzyme/protein synthesis continue; replication of centrosomes complete. What happen...

BIOH111 FINAL EXAM PREP QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS GRADED A++ LATEST UPDATE Dendrites - what do they look like Short, tapering, slightly branched structures extending from the body of the cell. Dendrites - what do they consist of Contain receptor sites Dendrites - what is the function Receive input from cells. Contact other neurons. Conduct impulses toward the cell body. (Imagine they're like a telephone tower receiving messages) Axons - what do they look like ...

BIOH111 SESSION 1-4 EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS GRADED A++ LATEST UPDATE What is anatomy? The science of body structures and their relationships. What is physiology? The science of body functions and how body parts work. What is palpation? The act of touching body surfaces with the hands. What is auscultation? The act of listening to body sounds to evaluate organ functioning. What is percussion? The act of tapping on the body surface and listening to the result...