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EXSC 223 EXAM 1 Questions and Answers 100% Solved | Rated A+ £9.20
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EXSC 223 EXAM 1 Questions and Answers 100% Solved | Rated A+
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EXSC 223 EXAM 1 Questions and Answers 100% Solved | Rated A+ Negative Feedback - Maintain or restore balance → (Afferent pathway) Receptor → Control Center (CNS) → (Efferent pathway) Effector → Balance → Example: Body temperature rises (Stimulus), Sensitive cells in skin and brain (...

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  • December 23, 2024
  • 14
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • exsc 223

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  • EXSC 223
  • EXSC 223

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JOSHCLAY

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EXSC 223 EXAM 1 Questions and

Answers 100% Solved | Rated A+


Negative Feedback - ✔✔Maintain or restore balance

→ (Afferent pathway) Receptor → Control Center (CNS) → (Efferent

pathway) Effector → Balance →

Example: Body temperature rises (Stimulus), Sensitive cells in skin and

brain (Receptors), Thermoregulatory center in the brain (Control Center),

Sweat glands (Effector), Evaporation of sweat, Body temperature falls

(Response)

Positive Feedback - ✔✔Magnify the original stimulus; Self-sustaining or

self-perpetuating

Catalyst - ✔✔Lowers the energy of activation; Increase the rate of a

reaction without being consumed in the reaction

Enzymes - ✔✔Biological catalysts

Apoenzymes - ✔✔Protein portion

Cofactor - ✔✔Assist the reaction

ATP - ✔✔Adenosine Triphosphate

1
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

, (Adenine + Ribose (sugar) + Phosphate groups)

Phosphate groups connected by high energy phosphate bonds that can be

hydrolyzed to release energy (usually in the form of heat)

Adenosine - ✔✔Binds to receptors in brain and causes us to be less alert;

signaling molecule

The Cell Theory - ✔✔1. Cell is the basic unit of life

2. Organism activity depends on individual and collective activities of cells.

3. Principal of complementarity; Specific subcellular structures dictate

biochemical activities.

4. Continuity of life has a cellular basis

Phospholipids - ✔✔Make up the cell membrane by forming the

phospholipid bilayer

Cholesterol - ✔✔Stabilizes the membrane and maintains fluidity; The basis

for all steroids formed in the body

Glygolipids - ✔✔Attached sugar groups

Integral Membrane Proteins - ✔✔Most transmembrane, hydrophobic, and

hydrophilic regions; Involved in transport function (channels, carriers)

Peripheral Membrane Proteins - ✔✔Not usually embedded in the lipid,

attached to integral proteins; Often enzymes and signaling proteins

2
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

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