Human Health & Physiology (HL) Question Preview (ID: 9386)


Test Questions About Topics 6 And 11 (Human Health & Physiology) Of The IB Biology Syllabus. TEACHERS: click here for quick copy question ID numbers.

Which best describes the role of the kidney in homeostasis?
a) Storage of urine
b) Producing urine at a constant rate
c) Removing urea from the blood
d) Maintaining the water content of the blood between narrow limits

What types of cells in the immune system destroy body cells that have been infected by viruses?
a) activated B-cells
b) cytotoxic t-cells
c) phagocytic macrophages
d) plasma cells formed by clonal selection

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) Initiates action potential needed for transmission of impulse by pumping calcium ions out of ER.
d) Est. resting potential needed for transmission of impulse by pumping Na and K ions across membrane.

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 fluid filtered from the blood in the glomeruli
c) The amount of solutes selectively reabsorbed in the proximal convoluted tubule
d) The amount of water reabsorbed in the collecting ducts

What cells secrete insulin?
a) Beta cells of the pancreas
b) Cells of the liver
c) Alpha cells of the pancreas
d) Epithelial cells of the intestine

What does oxytocin control?
a) Brain development of the fetus
b) Onset of ovulation
c) Stimulation of uterine contractions
d) Implantations of the blastocyst

A blood clot contains a network of protein. What is the protein?
a) fibrin
b) fibrinogen
c) hemoglobin
d) thrombin

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+ is pumped in.
b) Voltage-gated sodium ion channels open and Na+ diffuses out.
c) Voltage-gated potassium ion channels open and K+ is pumped out.
d) Voltage-gated potassium ion channels open and K+ diffuses out.

Which of the following is closely associated with lowering of high body temperature?
a) Constriction of blood vessels in the skin
b) Vasodilation of blood vessels in the skin
c) Increased shivering
d) Decreased sweat production

What sequence of organs do substances pass through as they move through the human digestive system?
a) mouth, stomach, pancreas, small intestine, liver, large intestine, anus
b) mouth, stomach, small intestine, pancras, liver, large intestine, anus
c) mouth, esophagus, stomach, small intestine, large intestine, anus
d) mouth, esophagus, stomach, large intestine, small intestine, anus

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