Science Quiz

Random Science or Biology Quiz
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Question Answer Wrong Answers
What is NOT true for digestion? Food moves through the pancreas
82.4%
Food moves through the oesophagus
2.7%
Food moves through the alimentary canal
10.5%
Food moves through the small intestine
2%
What is the difference between type I pneumocytes and type II pneumocytes? Type I pneumocytes faciliate gas exchange, type II pneumocytes secrete a pulmonary surfactant
66.9%
Type II pneumocytes faciliate gas exchange, type I pneumocytes secrete a pulmonary surfactant
18.6%
There is no difference
3%
Type II pneumocytes cannot replicate, whereas type I pneumocytes can
8.1%
How are antibodies produced? Helper T cells activate B cells (plasma cells), which produce specific antibodies
66.6%
B cells (plasma cels) activate helper T cells, which produce specific antibodies
22%
Stem cells differentiate into antibodies
4.7%
Antibodies are released in the pituitary gland
2.7%
What is the function of the sinoatrial (SA) node? Controls the heart rate
64.2%
Releases hormones into the blood that cause blood to coagulate
5.7%
Triggers repair of heart tissue
2%
Maintains a constant heart rate
24.7%
How does myelination affect the transmission of impulses in a neuron? Schwann cells and myelin sheathes allow saltatory conduction between nodes of ranvier, speeding up the movement of an impulse
63.9%
Allows for neurons to form more synapses with other neurons, increasing the network density of neurons
15.5%
Allows for constant depolarization of the axon resulting in hyperpolarization
7.8%
Lowers the threshold level required to send off an impulse
7.4%
Which of the following features are NOT true for arteries? Internal valves
62.2%
High blood pressure
8.1%
Muscle cells
19.6%
Carry blood away from heart
5.7%
What best describes the correct pathway of blood flow in the heart? Superior vena cava, right atrium, right ventricle, pulmonary artery
60.5%
Aorta, left atrium, left ventricle, pulmonary vein
9.1%
Superior vena cava, left atrium, left ventricle, pulmonary artery
12.8%
Pulmonary veins, right atrium, right ventricle, aorta
13.5%
What is the action of fibrinogen and how is it activated? Damaged blood vessel triggers conversion of prothrombin into thrombin. Thrombin converts fibrinogen into fibrin, which forms a clot at the injury.
46.3%
Damaged blood vessel triggers conversion of prothrombin into thrombin. Thrombin converts fibrin into fibrinogen, which forms a clot at the injury.
20.3%
Damaged blood vessel triggers conversion of fibrin into prothrombin. Prothrombin converts thrombin into fibrinogen, which forms a clot at the injury.
13.2%
Damaged blood vessel triggers conversion of fibrinogen into fibrin. Fibrin converts prothrombin into thrombin, which forms a clot at the injury.
16.9%
What best describes the transmission of a synaptic signal? Action potential arrives at presynaptic neuron and causes Calcium channels to open. Neurotransmitters are released via exocytosis into synaptic cleft
40.5%
Action potential arrives at presynaptic neuron and causes Sodium channels to open. Neurotransmitters are released via exocytosis into synaptic cleft
24%
Sodium ions bind to postsynaptic receptors and open channels. Neurotransmitters enter the postsynaptic neuron and trigger an impulse
12.2%
Action potential arrives at presynaptic nephron and causes Calcium channels to open. Neurotransmitters are released via exocytosis into synaptic cleft
15.5%
In the female reproductive system, what hormones reach their peak levels during ovulation? Lutenizing hormone and follicle stimulating hormone
38.2%
Progesterone and estrogen
40.5%
Progesterone and lutenizing hormone
13.9%
None
3.7%
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