Domanda del libro di testo
Absence of which of the following nitrogen-containing bases would prevent RNA synthesis?
a. Adenine
b. Cytosine
c. Guanine
d. Thymine
e. Uracil
42
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Ch. 2 Basic Chemistry
Marieb13th EditionEssentials of Human Anatomy & PhysiologyISBN: 9780135624340
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TOC.tableOfContents
- Ch. 1 The Human Body: An Orientation23
- Ch. 2 Basic Chemistry22
- Ch. 3 Cells and Tissues20
- Ch. 4 Skin and Body Membranes13
- Ch. 5 The Skeletal System38
- Ch. 6 The Muscular System26
- Ch. 7 The Nervous System26
- Ch. 8 Special Senses12
- Ch. 9 The Endocrine System24
- Ch. 10 Blood22
- Ch. 11 Cardiovascular System29
- Ch. 12 The Lymphatic System and Body Defenses21
- Ch. 13 The Respiratory System7
- Ch. 14 The Digestive System and Body Metabolism13
- Ch. 15 The Urinary System23
- Ch. 16 The Reproductive System15
Marieb13th EditionEssentials of Human Anatomy & PhysiologyISBN: 9780135624340Non è quello che usi tu?Cambia libro di testo
Capitolo 2, Problema 4
Alkaline substances include which of the following?
a. Gastric juice
b. Water
c. Blood
d. Lemon juice
e. Ammonia
Guida verificata passo dopo passo1
Step 1: Understand the concept of alkaline substances. Alkaline substances have a pH greater than 7, indicating they are basic rather than acidic. Acids have a pH less than 7, while neutral substances have a pH of 7.
Step 2: Analyze each option provided in the question. Determine whether each substance is acidic, neutral, or alkaline based on its typical pH value.
Step 3: Gastric juice (option a) is highly acidic, with a pH of around 1-3, due to the presence of hydrochloric acid. Therefore, it is not alkaline.
Step 4: Water (option b) is neutral, with a pH of approximately 7. It is neither acidic nor alkaline.
Step 5: Blood (option c) is slightly alkaline, with a pH range of 7.35-7.45. Lemon juice (option d) is acidic, with a pH of around 2-3. Ammonia (option e) is strongly alkaline, with a pH of around 11-12. Based on this analysis, identify the alkaline substances from the list.
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pH Scale
The pH scale measures the acidity or alkalinity of a solution, ranging from 0 to 14. A pH less than 7 indicates acidity, while a pH greater than 7 indicates alkalinity. Understanding the pH scale is essential for identifying alkaline substances, as it helps categorize solutions based on their hydrogen ion concentration.
Video consigliato:
Percorso guidato
07:58
pH Scale
Alkaline Substances
Alkaline substances, also known as bases, are compounds that can accept hydrogen ions or donate electron pairs in reactions. Common examples include sodium hydroxide and ammonia. Recognizing which substances are alkaline is crucial for answering the question, as it involves identifying those with a pH greater than 7.
Video consigliato:
Percorso guidato
2:36Introduction to Blood Example 1
Common Alkaline Solutions
Certain everyday substances are known to be alkaline, such as ammonia and some cleaning agents. In contrast, substances like gastric juice and lemon juice are acidic. Familiarity with common alkaline solutions helps in distinguishing them from acidic ones, which is necessary for selecting the correct answers in the multiple-choice question.
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Percorso guidato
02:19Homogenous vs. Heterogenous Solutions
Pratica correlata
Domanda del libro di testo
Glucose is to starch as:
a. A steroid is to a lipid
b. A nucleotide is to a nucleic acid
c. An amino acid is to a protein
d. A polypeptide is to an amino acid
52
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Domanda del libro di testo
What lipid type is stored in fat deposits beneath the skin?
a. Triglyceride
b. Steroid
c. Vitamin D
d. Phospholipid
e. Prostaglandin
54
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Domanda del libro di testo
Important functions of water include which of the following?
a. Provides cushioning
b. Acts as a transport medium
c. Participates in chemical reactions
d. Acts as a solvent for sugars, salts, and other solutes
e. Reduces temperature fluctuations
53
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Domanda del libro di testo
Pick out the correct match(es) of element and number of valence electrons. Draw a planetary model of each atom to help you choose the best answer.
a. Oxygen—6
b. Chlorine—8
c. Phosphorus—5
d. Nitrogen—3
e. Carbon—4
95
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Domanda del libro di testo
Which of the following is (are) true concerning the atomic nucleus?
a. It contains the mass of the atom.
b. The negatively charged subatomic particles are here.
c. Subatomic particles can be ejected.
d. It contains subatomic particles that determine atomic number.
e. It contains subatomic particles that interact with other atoms.
127
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