Anatomy and Physiology: Scope and Levels
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Questions and Answers

Which of the following accurately describes the relationship between anatomy and physiology?

  • Anatomy and physiology are unrelated fields of study within biology.
  • Physiology examines body structures under a microscope, while anatomy does not.
  • Anatomy studies the structures of the body, and physiology studies the functions of these structures. (correct)
  • Anatomy focuses on the function of the body, while physiology studies its structures.

A researcher is studying the arrangement of organs within the abdominal cavity. Which branch of gross anatomy is most relevant to this study?

  • Regional anatomy (correct)
  • Histology
  • Surface anatomy
  • Cytology

A scientist is investigating the effects of a new drug on nerve impulse transmission. Which subdivision of human physiology is most applicable to this research?

  • Cell physiology
  • Endocrinology
  • Pathophysiology
  • Neurophysiology (correct)

During a medical check-up, a doctor assesses the location of superficial blood vessels. Which division of gross anatomy is being utilized?

<p>Surface anatomy (B)</p> Signup and view all the answers

Which of the following represents the correct order of levels of organization in the human body, from smallest to largest?

<p>Chemical → Cellular → Tissue → Organ → Organ System (B)</p> Signup and view all the answers

In a car accident, a patient suffers a broken femur. The point of impact is closer to the hip than the knee. In anatomical terms, the point of impact is _______ to the knee.

<p>Proximal (C)</p> Signup and view all the answers

Which of the following activities is an example of anabolism?

<p>Synthesis of a muscle protein from amino acids. (A)</p> Signup and view all the answers

A surgeon makes an incision that divides the body into anterior and posterior portions. Which plane is this incision made along?

<p>Coronal plane (A)</p> Signup and view all the answers

Which of the following describes the correct sequence of events in a homeostatic control system?

<p>Stimulus → receptor → control center → effector → homeostasis restored (B)</p> Signup and view all the answers

Which of the following examples illustrates positive feedback?

<p>Blood clotting cascade where each step amplifies the previous one. (A)</p> Signup and view all the answers

A disease is best described as:

<p>A state of homeostatic imbalance. (D)</p> Signup and view all the answers

Which property is NOT common to all living organisms?

<p>Photosynthesis. (B)</p> Signup and view all the answers

If an atom has 16 protons and 17 neutrons, what are its atomic number and atomic mass, respectively?

<p>16 and 33 (B)</p> Signup and view all the answers

A certain medication has a biological half-life of 8 hours. If a patient takes 200 mg of the medication, how much will remain in their system after 16 hours, assuming first-order kinetics?

<p>50 mg (B)</p> Signup and view all the answers

Which of the following statements accurately describes the role of ions in the body?

<p>Sodium, a common extracellular cation, is most commonly involved in forming ionic bonds. (D)</p> Signup and view all the answers

Consider two molecules with the same chemical formula, $C_6H_{12}O_6$, but different structural arrangements. What term describes these molecules?

<p>Isomers (C)</p> Signup and view all the answers

In a chemical bond between two atoms, what primarily determines whether the bond is polar or nonpolar?

<p>The difference in electronegativity between the two atoms. (A)</p> Signup and view all the answers

If a solution's pH changes from 7 to 4, what happens to the concentration of $H^+$ ions?

<p>The $H^+$ concentration increases by a factor of 1000 (B)</p> Signup and view all the answers

Which of the following best describes the primary function of a buffer in a solution?

<p>To maintain a stable pH level when acids or bases are added. (A)</p> Signup and view all the answers

A scientist is analyzing a molecule and finds that it contains carbon, hydrogen, and nitrogen. Which of the following classifications is MOST likely?

<p>The molecule is organic. (D)</p> Signup and view all the answers

Which of the following describes the relationship between monomers and polymers?

<p>Monomers combine to form polymers through a process called polymerization. (C)</p> Signup and view all the answers

During exercise, muscle cells break down glycogen into glucose for energy. What type of molecule is glycogen?

<p>A polysaccharide. (C)</p> Signup and view all the answers

Consider a protein with a mutation that alters its secondary structure, but does not affect its primary structure. What is MOST likely to be disrupted by this mutation?

<p>The folding patterns, such as alpha helices and beta sheets. (B)</p> Signup and view all the answers

In a chemical reaction, an enzyme reduces the activation energy ($E_a$) required for the reaction to proceed. How does this affect initial reaction rate?

<p>Increases the initial reaction rate (D)</p> Signup and view all the answers

Which component of a homeostatic control system is responsible for detecting changes in the internal environment?

<p>Receptor (C)</p> Signup and view all the answers

During labor, the body's production of oxytocin increases, which in turn causes more uterine contractions. These contractions further stimulate oxytocin release. This represents what type of feedback mechanism?

<p>Positive feedback, which amplifies the initial stimulus. (C)</p> Signup and view all the answers

Which of the following is the BEST definition of a disease state?

<p>A homeostatic imbalance that results in specific signs and symptoms. (C)</p> Signup and view all the answers

A plant growing towards sunlight is an example of which property of life?

<p>Responsiveness (C)</p> Signup and view all the answers

An atom has 10 protons, 11 neutrons, and 10 electrons. What is its atomic number and atomic mass, respectively?

<p>10 and 21 (B)</p> Signup and view all the answers

A drug has a biological half-life of 4 hours. If a 100mg dose is administered, how much of the drug is expected to remain in the body after 12 hours, assuming first-order kinetics?

<p>12.5 mg (B)</p> Signup and view all the answers

Two molecules have the same molecular formula ($C_2H_6O$) but different arrangements of atoms. What are these molecules called?

<p>Isomers (A)</p> Signup and view all the answers

In a water molecule ($H_2O$), oxygen attracts electrons more strongly than hydrogen. What type of bond holds the hydrogen and oxygen atoms together?

<p>A polar covalent bond because electrons are shared unequally. (C)</p> Signup and view all the answers

A researcher is conducting a study on how different medications affect kidney function. Which subdivision of human physiology is MOST applicable to this research?

<p>System physiology (A)</p> Signup and view all the answers

During a dissection, a medical student identifies the different arteries and veins within the leg. Which division of gross anatomy is exemplified by this activity?

<p>Regional anatomy (B)</p> Signup and view all the answers

A scientist is examining a sample of lung tissue under a microscope to observe the structure of the cells. Which area of study does this fall under?

<p>Histology (C)</p> Signup and view all the answers

Which of the following sequences correctly lists the levels of structural organization in the human body from the simplest to the most complex?

<p>Chemical, cellular, tissue, organ, organ system (A)</p> Signup and view all the answers

In a clinical setting, a doctor is explaining the location of a skin rash in relation to a patient's heart. The doctor says, 'The rash is lateral and superficial to the heart.' What does this mean?

<p>The rash is further from the midline and closer to the surface than the heart. (C)</p> Signup and view all the answers

During surgery, a doctor needs to make an incision that divides the liver into equal left and right portions. Which plane would they use?

<p>Midsagittal plane (D)</p> Signup and view all the answers

A person is standing with their feet flat on the floor, arms at their sides, and palms facing forward. Which anatomical position is this?

<p>Anatomical position (A)</p> Signup and view all the answers

Which of the following BEST describes the relationship between the visceral pleura and parietal pleura?

<p>The parietal pleura lines the inner walls of the thoracic cavity, while the visceral pleura covers the lungs. (D)</p> Signup and view all the answers

In a scenario where two atoms form a chemical bond, and one atom has a significantly higher electronegativity than the other, what type of bond is most likely to form, and what is its characteristic?

<p>Polar covalent bond; electrons are shared unequally. (A)</p> Signup and view all the answers

How does the addition of a buffer to a solution containing a weak acid and its conjugate base affect the solution's ability to resist changes in pH when a strong base is added?

<p>The buffer will minimize the change in pH by reacting with the added hydroxide ions, converting them into water and the conjugate base of the buffer. (D)</p> Signup and view all the answers

Which of the following best describes how the concentration of hydrogen ions ($H^+$) changes as the pH of a solution goes from 3 to 6, and what does this pH change indicate?

<p>The $H^+$ concentration decreases by a factor of 1000, indicating the solution is becoming more alkaline. (A)</p> Signup and view all the answers

Consider the following molecules: ethanol ($C_2H_5OH$), sodium chloride ($NaCl$), and methane ($CH_4$). Which of these would be classified as organic molecules, and what feature primarily determines this classification?

<p>Ethanol and methane; presence of carbon-hydrogen bonds. (C)</p> Signup and view all the answers

In the context of biological macromolecules, how do monomers relate to polymers, and which process is typically involved in converting monomers to polymers?

<p>Monomers are the basic building blocks that join together to form polymers through dehydration reactions. (C)</p> Signup and view all the answers

After consuming a starchy meal, the polysaccharides are broken down into smaller, more manageable units in the digestive system. What are these resulting smaller units, and what is the primary enzyme responsible for this process?

<p>Monosaccharides, broken down by amylase. (C)</p> Signup and view all the answers

During the formation of a protein's tertiary structure, various interactions between amino acid side chains occur, contributing to the protein's unique three-dimensional shape. Which interaction is least likely to be affected by changes in pH within a typical physiological range?

<p>Hydrophobic interactions among nonpolar side chains. (B)</p> Signup and view all the answers

In a metabolic pathway, an enzyme is responsible for catalyzing a reaction. How does the presence of a specific enzyme affect the thermodynamics of the reaction, and what does this entail for the equilibrium constant?

<p>The enzyme does not affect the thermodynamics of the reaction; it only lowers the activation energy and thus the reaction rate. (A)</p> Signup and view all the answers

Flashcards

Anatomy

The study of the human body's structure.

Physiology

The study of the functions of the human body.

Microscopic Anatomy

Study of structures that require a microscope to observe.

Gross Anatomy

Study of larger body structures visible without a microscope.

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Histology

The study of tissues in the body at a microscopic level.

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Cytology

The study of individual cells and their structures.

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Metabolism

The sum of all chemical reactions within the body.

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Serous Membrane

Two-layered membrane covering body cavities; includes visceral and parietal layers.

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Homeostasis Components

Receptor detects changes, Control Center processes info, Effector carries out the response to restore balance.

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Positive Feedback

A mechanism that amplifies a response in the same direction, like during breastfeeding.

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Negative Feedback

A mechanism that counteracts changes by opposing the initial stimulus, like body temperature regulation.

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Atomic Number

The number of protons in an atom, determining its identity.

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Cation

A positively charged ion formed when an atom loses electrons.

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Anion

A negatively charged ion formed when an atom gains electrons.

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Covalent Bond

A bond formed when two atoms share electrons equally or unequally.

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Electronegativity

A measure of the tendency of an atom to attract electrons in a bond.

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Monomer

A single molecule that can bond to form polymers.

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Polysaccharides

Complex carbohydrates such as starch or glycogen.

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Kinetic Energy

Energy of motion.

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Exergonic Reaction

A chemical reaction that releases energy.

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Enzyme

A catalyst that speeds up chemical reactions.

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Activation Energy (Ea)

The minimum energy required to start a reaction.

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Buffer

A substance that regulates pH levels in a solution.

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Types of Microscopic Anatomy

Histology studies tissues; Cytology studies cells.

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Biological Half Life

Time for concentration of a stable isotope to reduce by half in a tissue or organ.

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Divisions of Gross Anatomy

Includes Systematic, Regional, Surface, Embryology, Comparative.

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Levels of Organization in the Body

From Chemical to Organism: Chemical, Cellular, Tissue, Organ, Organ System.

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Common Ions in the Body

Sodium, potassium, and others; crucial for various physiological processes.

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Anatomical Position

Feet forward, arms at sides, palms facing forward.

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Visceral vs Parietal Membrane

Visceral is the inner layer; Parietal is outer layer.

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Isomer

Compounds with the same formula but different structures.

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Single, Double, Triple Bonds

Single: 1 pair, Double: 2 pairs, Triple: 3 pairs of electrons shared.

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Function of Serous Fluid

Acts as a lubricant between membranes.

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Covalent vs Ionic Bonds

Covalent shares electrons, Ionic steals or donates electrons.

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Molecule Definition

A molecule consists of two or more bonded atoms.

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Types of Human Physiology

Cell, System, Neurophysiology, Endocrinology, Pathophysiology.

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Disease Definition

A disease is an imbalance in homeostasis within the body.

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Polarity in Bonds

A bond is polar if atoms have different electronegativities; nonpolar if similar.

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Structure of Phospholipid

Phospholipid has a hydrophilic head and a hydrophobic tail.

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Acid vs. Base

Acids have high H+ levels and low pH; bases have high OH- levels and high pH.

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Monomer vs. Polymer

Monomer is a single molecule; polymer is multiple bonded molecules.

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Protein Structures

Primary: sequence; Secondary: folding; Tertiary: 3D; Quaternary: multiple chains.

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Reduction vs. Oxidation

Reduction involves gaining electrons; oxidation involves losing electrons.

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Energy of Motion vs. Stored Energy

Kinetic energy is energy in motion; potential energy is stored energy.

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Enzyme Function

Enzymes are catalysts that lower activation energy and speed up reactions.

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Study Notes

Anatomy and Physiology

  • Anatomy: the study of the structure of the human body.
  • Physiology: the study of the function of the human body.
  • Microscopic anatomy: the study of the body using a microscope. Includes histology (tissues) and cytology (cells).
  • Gross anatomy: the study of the body without a microscope. Divided into systematic (various systems), regional (various regions), and surface (anatomic markings) anatomy. Also includes embryology (development) and comparative anatomy (similarities/differences).
  • Human physiology subdivisions: cell, system, neuro, endocrinology, and pathophysiology (disease).

Microscopic vs. Gross Anatomy

  • Microscopic anatomy involves using a microscope, allowing examination of smaller structures.
  • Gross anatomy is viewed without a microscope, focusing on larger structures.

Levels of Organization

  • Chemical level (molecules)
  • Cellular level (cells)
  • Tissue level(tissues)
  • Organ level (organs)
  • Organ system level (organ systems)
  • Organism level (organisms). These are listed in increasing complexity and order.

Molecular definition

  • A molecule is two or more atoms held together by chemical bonds.

Metabolism

  • Metabolism: the sum of all chemical reactions in the body.
  • Anabolism: the sum of all synthesis reactions.
  • Catabolism: the sum of all decomposition reactions.

Homeostasis

  • Homeostasis is the maintenance of a stable internal environment.
  • Receptor, control center, and effector are crucial components of the homeostatic feedback loop

Anatomical Planes

  • Transverse: horizontal plane dividing the body into superior and inferior sections.
  • Coronal: vertical plane dividing the body into anterior and posterior sections (frontal).
  • Midsagittal: vertical plane dividing the body into equal left and right halves.

Anatomical Terms

  • Directional terms allow clinicians and researchers to accurately describe the body's relationships using specific terms (superior, inferior, distal, proximal, etc).

Atoms and Ions

  • Atoms consist of protons (positive), neutrons (neutral), and electrons (negative).
  • An ion is an atom or molecule with a net electric charge due to the loss or gain of electrons.
  • Ions (sodium, potassium, calcium, magnesium, chloride, bicarbonate, phosphate) have various physiological roles within the body.

Biological Macromolecules

  • Organic molecules include carbohydrates, lipids, proteins, and nucleic acids.

Organic Chemistry

  • Organic molecules rely on carbon and hydrogen bonding and have characteristic structures.

Chemical Bonds

  • Covalent bonds are when atoms share electrons.
  • Polar covalent bonds have unequal electron sharing; non-polar bonds have equal electron sharing.
  • Ionic bonds involve the transfer of electrons, forming charged ions.

Organic Molecules

  • Carbohydrates are sugars and starches.
  • Lipids are fats and oils.
  • Proteins are made from amino acids.
  • Nucleic acids (DNA and RNA) are essential for genetic information.

Biochemical Processes

  • Enzymes are biological catalysts that accelerate chemical reactions in the body.
  • Enzymes function by lowering activation energy, the energy needed to initiate a reaction.
  • Enzymes have specific shapes (active sites) that bind to substrates (reactants).

Respiration

  • Glycolysis: the first stage of cellular respiration. This process occurs in the cytosol.
  • Intermediate stage: (part of aerobic cellular respiration)
  • Citric acid cycle (Krebs cycle): (part of aerobic cellular respiration), occurs in the mitochondria.
  • Electron transport chain: (part of aerobic cellular respiration), occurs in the mitochondria, where most ATP is generated.

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A&P Exam 1 Study Guide PDF

Description

Explore the basics of anatomy and physiology, differentiating between microscopic studies and gross anatomy. Delve into the levels of human body organization, from molecules to organ systems, and the study of tissue(histology) and cells(cytology).

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