Questions & Answers
Browse all 20 questions from the
Advanced Human Biology Assessment study set below.
Each question shows the correct answer — select a study format above to practice interactively.
1
Which specific immunoglobulin class is the first to be secreted in a primary immune response and functions as an effective agglutinating agent?
2
During the cardiac cycle, which physiological event directly precedes the closure of the atrioventricular valves?
-
A
Ventricular systole
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B
Atrial diastole
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C
Ventricular diastole
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D
Isovolumetric relaxation
3
In the context of the nephron, where does the majority of obligatory water reabsorption occur?
-
A
Distal convoluted tubule
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B
Loop of Henle
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C
Proximal convoluted tubule
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D
Collecting duct
4
Which hormone acts primarily on the distal convoluted tubules and collecting ducts to increase sodium reabsorption?
-
A
Aldosterone
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B
Cortisol
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C
Antidiuretic hormone
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D
Angiotensinogen
5
What is the primary function of the enzyme aminopeptidase located on the brush border of the small intestine?
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A
Hydrolyzing lipids into fatty acids
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B
Cleaving terminal amino acids from peptides
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C
Catalyzing starch into maltose
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D
Breaking down nucleic acids
6
Which process describes the movement of air into the lungs resulting from a decrease in intrapleural pressure?
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A
Passive expiration
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B
Forced inspiration
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C
Quiet inspiration
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D
Forced expiration
7
In the sliding filament model of muscle contraction, which band of the sarcomere remains constant in length during contraction?
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A
I-band
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B
H-zone
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C
A-band
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D
Z-line
8
Which type of glial cell is responsible for the myelination of axons within the peripheral nervous system?
-
A
Astrocytes
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B
Oligodendrocytes
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C
Microglia
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D
Schwann cells
9
During the follicular phase of the ovarian cycle, which hormone is primarily responsible for the rapid growth of the endometrium?
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A
Progesterone
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B
Estrogen
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C
LH
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D
FSH
10
What is the role of the acrosome in the process of human fertilization?
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A
Providing motility to the sperm
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B
Housing the paternal mitochondria
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C
Releasing hydrolytic enzymes to penetrate the zona pellucida
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D
Encoding genetic information for the zygote
11
Which part of the brain is the primary integration center for the autonomic nervous system and thermoregulation?
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A
Thalamus
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B
Hypothalamus
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C
Cerebellum
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D
Medulla oblongata
12
In the ABO blood group system, which genotype represents a person with type O blood?
13
Which biochemical pathway occurs in the cytosol and results in the net production of two ATP and two NADH molecules?
-
A
Krebs cycle
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B
Electron transport chain
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C
Glycolysis
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D
Beta-oxidation
14
What is the effect of parathyroid hormone (PTH) on blood calcium levels?
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A
Decreases serum calcium by promoting bone deposition
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B
Increases serum calcium by stimulating osteoclast activity
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C
Inhibits calcium reabsorption in the kidneys
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D
Promotes calcitonin secretion
15
Which connective tissue structure connects muscle to bone?
-
A
Ligament
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B
Tendinopathy
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C
Tendon
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D
Fascia
16
During DNA replication, which enzyme is responsible for synthesizing the RNA primer required for DNA polymerase?
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A
DNA ligase
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B
Helicase
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C
Primase
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D
Topoisomerase
17
Which chemical messenger is responsible for inhibiting the release of growth hormone from the anterior pituitary?
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A
Somatostatin
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B
Dopamine
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C
Prolactin
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D
Thyrotropin-releasing hormone
18
What is the primary site of hematopoiesis in a healthy adult?
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A
Liver
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B
Spleen
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C
Yellow bone marrow
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D
Red bone marrow
19
In the respiratory system, which structure prevents the collapse of the trachea during inhalation?
-
A
Hyaline cartilage rings
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B
Smooth muscle layers
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C
Elastic connective tissue
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D
Ciliated epithelium
20
Which vitamin is required as a coenzyme for the synthesis of clotting factors II, VII, IX, and X?
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A
Vitamin A
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B
Vitamin D
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C
Vitamin K
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D
Vitamin C
