Variation in haemoglobin levels among different populations can be influenced by ___ and ___.

Activity levels and socio-economic status

True or False: The metabolic limit of haemoglobin in red blood cells never rises above 35 grams per decilitre.

True

What physiological changes in haemoglobin levels are observed after the age of 14 in males and females?

Males increase their haemoglobin level to 15.3 gm/dl, while females remain stagnant at around 13.5 gm/dl.

G6PD deficiency is caused by a mutation in a gene located on which chromosome?

X chromosome

True or False: Transferrins in serum are capable of binding ferrous ions.

False. Transferrins bind ferric ions.

Haptoglobins bind free haemoglobin to prevent damage to which organ?

Kidneys

Fill in the blank: An increase in fat level is observed from ___ years to puberty in both sexes.

9

What is the significance of measuring pulse rate during exercise?

It provides information about the fitness level and health of a person.

True or False: The G6PD deficiency is common in populations from the Middle East and equatorial Africa.

True

Fill in the blank: Subcutaneous fat begins to be laid in the fetus at about ___ weeks of gestation.

34

What is bradycardia and what might it indicate about an individual's health?

Bradycardia indicates potential health issues.

• Heart rate below 60 bpm.

• May signal heart disease risk.

• Can indicate electrolyte imbalance.

Fill in the blank: The pressure at which blood leaves the heart is known as ___ blood pressure.

Systolic

True or False: A systolic blood pressure of 140 mm Hg and diastolic blood pressure of 90 mm Hg are classified as normotensive.

False. These values are classified as borderline hypertensive.

What percentage of blood pressure variation is attributed to environmental factors according to population studies?

16%

Fill in the blank: A normal resting heart rate for well-trained athletes is typically between ___ and ___ beats per minute.

40 and 60

Describe the relationship between age and blood pressure according to the content.

Blood pressure rises with age.

• Increased vascular resistance.

• Arterial stiffness develops over time.

• Normal values change as one ages.

True or False: Sensory mechanisms such as the ability to taste phenylthiocarbamide (PTC) are influenced by genetic factors.

True. The ability to taste PTC is an autosomal polymorphic trait, indicating genetic influence.

What is the classification of blood pressure for individuals with a systolic blood pressure greater than 169 mm Hg?

They are classified as hypertensive.

Haemoglobin levels in males are typically maintained at ___ gm/dl from ages 20 to 60.

15.3 gm/dl

True or False: Females generally have a higher haemoglobin level than males after the age of 14.

False. Males generally have a higher haemoglobin level, reaching 15.3 gm/dl, while females remain around 13.5 gm/dl.