ECFMG Medical Knowledge & Clinical Science

Question 1

What is the primary function of hemoglobin in the human body?

Accepted Answer

Carrying oxygen to tissues

Answer

Hemoglobin is a protein found in red blood cells that contains iron. Its primary function is to bind with oxygen in the lungs and transport it efficiently through the bloodstream to various tissues and organs throughout the body. This oxygen is vital for cellular respiration and energy production, making hemoglobin essential for life.

Question 2

Which organ is primarily responsible for insulin production?

Accepted Answer

Pancreas

Answer

The pancreas is a glandular organ located behind the stomach that plays a crucial role in both digestion and hormone production. Specifically, the beta cells within the islets of Langerhans in the pancreas are responsible for producing insulin. Insulin is a hormone essential for regulating blood glucose levels by facilitating glucose uptake into cells.

Question 3

What type of joint is the knee classified as?

Accepted Answer

Hinge joint

Answer

The knee joint is classified as a hinge joint, which primarily allows for movement in one plane, similar to a door hinge. This type of joint facilitates flexion (bending) and extension (straightening) of the leg. While it does allow for some limited rotation when flexed, its main function is uniaxial movement.

Question 4

Which vitamin deficiency causes scurvy?

Accepted Answer

Vitamin C

Answer

Scurvy is a disease caused by a severe deficiency of Vitamin C, also known as ascorbic acid. Vitamin C is essential for the synthesis of collagen, a crucial protein for connective tissues, wound healing, and maintaining healthy blood vessels, bones, and teeth. Without sufficient Vitamin C, these bodily functions are impaired, leading to characteristic symptoms.

Question 5

What is the normal range for adult human body temperature?

Accepted Answer

36.5°C to 37.5°C

Answer

The normal range for adult human body temperature is generally considered to be between 36.5°C and 37.5°C (or 97.7°F to 99.5°F). While 37.0°C (98.6°F) is often cited as the average, individual temperatures can fluctuate slightly throughout the day and vary based on factors like activity level. Maintaining this narrow range is crucial for optimal physiological function.

(ECFMG) Educational Commission for Foreign Medical Graduates Practice Test

(ECFMG) Educational Commission for Foreign Medical Graduates Practice Test

ECFMG Medical Knowledge & Clinical Science