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Human Health & Physiology (HL)
Test Description: Test questions about Topics 6 and 11 (Human Health & Physiology) of the IB Biology syllabus.
Instructions: Answer all questions to get your test result.
1) Which best describes the role of the kidney in homeostasis?
A
Producing urine at a constant rate
B
Removing urea from the blood
C
Maintaining the water content of the blood between narrow limits
D
Storage of urine
2) What types of cells in the immune system destroy body cells that have been infected by viruses?
A
phagocytic macrophages
B
cytotoxic t-cells
C
plasma cells formed by clonal selection
D
activated B-cells
3) What is the role of active transport in the transmission of nerve impulses by neurons?
A
Propagates an action potential by pumping sodium ions across the membrane out of the neuron.
B
Propagates an action potential by pumping sodium ions across the membrane into the neuron.
C
Est. resting potential needed for transmission of impulse by pumping Na and K ions across membrane.
D
Initiates action potential needed for transmission of impulse by pumping calcium ions out of ER.
4) What can be changed in the kidney over a period of time in order to carry out the process of osmoregulation?
A
The amount of blood flowing to the kidney
B
The amount of solutes selectively reabsorbed in the proximal convoluted tubule
C
The amount of fluid filtered from the blood in the glomeruli
D
The amount of water reabsorbed in the collecting ducts
5) What cells secrete insulin?
A
Beta cells of the pancreas
B
Epithelial cells of the intestine
C
Cells of the liver
D
Alpha cells of the pancreas
6) What does oxytocin control?
A
Implantations of the blastocyst
B
Onset of ovulation
C
Brain development of the fetus
D
Stimulation of uterine contractions
7) A blood clot contains a network of protein. What is the protein?
A
hemoglobin
B
thrombin
C
fibrinogen
D
fibrin
8) In a nerve impulse, what happens at the site following the highest point of the action potential?
A
Voltage-gated sodium ion channels open and Na+ diffuses out.
B
Voltage-gated potassium ion channels open and K+ is pumped out.
C
Voltage-gated potassium ion channels open and K+ diffuses out.
D
Voltage-gated sodium ion channels open and Na+ is pumped in.
9) Which of the following is closely associated with lowering of high body temperature?
A
Vasodilation of blood vessels in the skin
B
Increased shivering
C
Decreased sweat production
D
Constriction of blood vessels in the skin
10) What sequence of organs do substances pass through as they move through the human digestive system?
A
mouth, esophagus, stomach, small intestine, large intestine, anus
B
mouth, esophagus, stomach, large intestine, small intestine, anus
C
mouth, stomach, small intestine, pancras, liver, large intestine, anus
D
mouth, stomach, pancreas, small intestine, liver, large intestine, anus
*select an answer for all questions
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