Study HubHubPage 19/62Scan verified MCQs with the answer highlighted, then open explanations when you want the reasoning.
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Human Anatomy
Newborn baby brain weight is about ________?
The average brain weight of a newborn baby is approximately 300 grams. Option A correctly reflects this typical value, while option B (400 grams) is higher than the average newborn brain weight.
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Vitamins And Blood Circulation
Which of the following vitamins is required for normal blood circulation?
Vitamin K is essential for normal blood circulation because it plays a critical role in blood clotting, which helps prevent excessive bleeding and supports vascular health.
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Human Anatomy
How thick is the skin?
The average thickness of human skin varies but is generally around 2 to 3 millimeters, with 3mm being a common estimate for average skin thickness. Options B and D (centimeters) are too large for skin thickness. Therefore, 3mm (option C) is the most accurate answer.
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Human Skeletal System
How many bones are in each foot?
Each human foot contains 26 bones, including the tarsals, metatarsals, and phalanges. This is a well-established anatomical fact.
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Human Circulatory System
An average human heart beats about how many times in a minute?
The average human heart beats about 72 times per minute at rest, which is considered a normal resting heart rate for adults.
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Blood Components
Erythrocyte is another name for a __________?
Erythrocyte is the scientific term for red blood cells, which carry oxygen in the blood. Therefore, option C is correct.
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Cardiovascular Physiology
How is blood pressure conventionally denoted?
Blood pressure is conventionally expressed as systolic pressure over diastolic pressure, representing the pressure during heart contraction and relaxation respectively.
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Respiratory System
___ are the breathing center of the body?
The breathing center of the body is located in the brainstem, specifically in the medulla oblongata and pons, which regulate the rate and depth of breathing. None of the options (Nose, Air, Lungs) are the actual breathing center, so 'None of these' is the correct choice.
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Animal Adaptations
The owl can see most clearly in total darkness because:
Owls have large eyes with forward-facing orbs that provide binocular vision, enhancing depth perception and allowing them to see clearly in low light conditions. This anatomical feature is key to their ability to see well in darkness, unlike the incorrect options which are either biologically inaccurate or unrelated.
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Endocrine System
Calcium level in the blood is regulated by the: __________?
Calcium levels in the blood are primarily regulated by the parathyroid glands through the secretion of parathyroid hormone (PTH). The thyroid gland influences calcium metabolism via calcitonin but plays a lesser role compared to the parathyroid. Therefore, the correct answer is Parathyroid.