Everyday Science Mcqs

The ability of the Eye to see in the dark, is due to the production of a purple pigment known as________?

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The ability of the Eye to see in the dark, is due to the production of a purple pigment known as________?A. Carotene
B. Rhodopsin
C. Iodopsin
D. Retinene

Retinene is better known as retinaldehyde or simply retinal and is fundamental in the transduction of light into visual signals in the photoreceptor level of the retina (known as the visual cycle). Retinene is more formally known as dehydroretinaldehyde.

 

The brain of human adult weighs about_________?

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The brain of human adult weighs about_________?A. 1200 – 1300 gm
B. 1600 – 2000 gm
C. 500 – 800 gm
D. 100 – 200 gm

The adult human brain weighs about 3 pounds (1,300-1,400 g). The adult human brain is about 2% of the total body weight. The average human brain is 140 mm wide. The average human brain is 167 mm long.

 

EEG records the activity of__________?

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EEG records the activity of__________?A. Heart
B. Lungs
C. Brain
D. Muscles

Electroencephalography (EEG) measures voltage fluctuations resulting from ionic current within the neurons of the brain. In clinical contexts, EEG refers to the recording of the brain’s spontaneous electrical activity over a period of time, as recorded from multiple electrodes placed on the scalp.

 

Insufficient blood supply in human body is referred as___________?

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Insufficient blood supply in human body is referred as___________?A. Ischemia
B. Hyperemia
C. Hemostasia
D. Hemorrhage

Ischemia or ischaemia is a restriction in blood supply to tissues, causing a shortage of oxygen that is needed for cellular metabolism (to keep tissue alive). Ischemia is generally caused by problems with blood vessels, with resultant damage to or dysfunction of tissue.