Biochemistry and Physiology Quiz 10

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Question 1 of 20

1. Question

All of the following are characteristics of skeletal muscle with a type II twitch speed (fast and powerful contractions) EXCEPT:

it has a fast contraction speed.
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it has a relatively low SR content.
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it has a relatively low myoglobin content.
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it has a relatively large fiber diameter.
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it has a relatively high rate of ATPase activity.
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Question 2 of 20

2. Question

Which of the following formulas is NOT correct?

$\text{MAP} = \text{CO} \cdot \text{TPR}$
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$\text{CO} = \text{HR} \cdot \text{SV}$
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$\text{R} = 8\eta\text{L}/\pi\text{r}^2$
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$(\text{P}{\text{out}} – \text{P}{\text{in}}) = \text{T}/\text{r}$ (Laplace law)
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$\text{F} = \text{P}\pi\text{r}^4 / 8\eta\text{L}$ (Poiseuille law)
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Question 3 of 20

3. Question

Epinephrine is derived from which of the following amino acids?

Histidine
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Serine
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Glycine
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Tryptophan
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Phenylalanine
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Question 4 of 20

4. Question

All of the following conditions result in increased alveolar gas exchange EXCEPT:

decreased alveolar thickness.
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increased oxygen solubility.
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greater $\text{P}_{\text{a}}\text{O}2$ (pulmonary artery) than $\text{P}{\text{A}}\text{O}_2$ (alveolar).
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increased alveolar surface area.
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all cause increased alveolar gas exchange.
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Question 5 of 20

5. Question

Which of the following products are produced after one complete turn of the Krebs cycle?

2 ATP, 2 NADH, 3 $\text{FADH}_2$
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12 ATP, 1 GTP, 2 NADH
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1 ATP, 1 NADH, 3 $\text{FADH}_2$
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2 GTP, 2 NADH, 3 $\text{FADH}_2$
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1 GTP, 3 NADH, 1 $\text{FADH}_2$
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Question 6 of 20

6. Question

Which encapsulated sensory receptor is primarily responsible for detecting stretch, and is located in the dermis of hairy skin?

Free nerve endings
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Meissner corpuscles
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Ruffini corpuscles
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Pacinian corpuscles
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Merkel discs
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Question 7 of 20

7. Question

ADH (Antidiuretic Hormone) is produced in which structure? A

Hypothalamus
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Anterior pituitary
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Posterior pituitary
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Adrenal medulla
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Adrenal cortex
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Question 8 of 20

8. Question

Which of the following enzyme functions is incorrectly matched?

DNA polymerase: Synthesizes complementary DNA strand in $5' \to 3'$ direction
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Exonuclease: Cleaves nucleotide primers
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Helicase: Winds the DNA molecule after replication
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DNA ligase: Ligates Okazaki fragments
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Restriction endonuclease: Cleaves DNA at specific points
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Question 9 of 20

9. Question

Which of the following bodily secretions is typically the most acidic?

Bile
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Pancreatic
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Gastric
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Intestinal
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Question 10 of 20

10. Question

What is the most common amino acid sequence repeat found in collagen $\alpha$-chains?

Asp-x-y
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Pro-x-y
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Gly-x-y
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Lys-x-y
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Gln-x-y
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Question 11 of 20

11. Question

Water is reabsorbed in all of the following segments of the nephron EXCEPT:

proximal convoluted tubule.
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descending loop of Henle.
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ascending loop of Henle.
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distal convoluted tubule.
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collecting duct.
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Question 12 of 20

12. Question

Hematopoiesis (blood cell formation) occurs primarily in which tissue in adults

Lymph nodes
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Red marrow
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Yellow marrow
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Spleen
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Thymus
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Question 13 of 20

13. Question

The $\text{Na}^{+}/\text{K}^{+}$ pump functions via primary active transport because it requires ATP.

Both the statement and the reason are correct and related.
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Both the statement and the reason are correct but not related.
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The statement is correct, but the reason is not.
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The statement is not correct, but the reason is correct
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Neither the statement nor the reason is correct.
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Question 14 of 20

14. Question

Which of the following is the correct sequence of electrical conduction through the heart?

SA node, AV node, bundle of His, Purkinje fibers, ventricular myocytes
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Ventricular myocytes, SA node, AV node, bundle of His, Purkinje fibers
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SA node, bundle of His, Purkinje fibers, AV node, ventricular myocytes
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AV node, SA node, bundle of His, Purkinje fibers, ventricular myocytes
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SA node, AV node, Purkinje fibers, bundle of His, ventricular myocytes
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Question 15 of 20

15. Question

In erythrocytes, glycolysis always ends in lactate because they do not contain mitochondria.

Both the statement and the reason are correct and related.
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Both the statement and the reason are correct but not related.
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The statement is correct, but the reason is not.
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The statement is not correct, but the reason is correct.
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Neither the statement nor the reason is correct.
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Question 16 of 20

16. Question

The majority of skeletal muscle (extrafusal fibers) is innervated by what type of motor neuron?

$\alpha$
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$\beta$
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$\gamma$
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$\delta$
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Question 17 of 20

17. Question

An individual taking exogenously administered glucocorticoids for several months will most likely acquire which condition?

Addison disease
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Cushing disease
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Cushing syndrome
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Plummer disease
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Myxedema
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Question 18 of 20

18. Question

A deficiency in the pathway converting which amino acid causes albinism?

Tyrosine
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Tryptophan
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Arginine
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Leucine
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Alanine
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Question 19 of 20

19. Question

Which cranial nerves transmit taste sensation to the brain?

VII
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IX
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X
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A and B
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All of the above
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Question 20 of 20

20. Question

The Cori cycle functions primarily by converting:

glycogen to glucose
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$\text{NAD}^{+}$ to $\text{NADH}$
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acetyl-CoA to malonyl-CoA
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lactate to glucose
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pyruvate to glucose
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Biochemistry and Physiology Quiz 10

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