Quiz questions Flashcards
What is the life span of a red blood cell
120 days
Which blood cell can be described as being a biconcave disc?
Erythrocyte
Which dietary components are needed for DNA synthesis, and thus greatly influence the production of red blood cells?
b12 and folate
The part of the haemoglobin molecule that directly interacts with oxygen is:
Iron ion
What would happen to red blood cells if the haem group were removed from haemoglobin?
Red blood cells would not be able to bind oxygen
What is the definition of the cardiac cycle?
It is a sequence of event that occurs during one complete heartbeat
What represents ventricular relaxation and filling phases
Diastole
What represents ventricular contraction and ejection phases.
Systole
The atrioventricular valves open during:
Ventricular Diastole
Globulins of the blood plasma are responsible for
Defense mechanisms
The atrioventricular valves open during:
Ventricular diastole
The ventricles begin to fill during ventricular diastole True or False
True
What is the pericardium
Protective fluid filled sac that surrounds the heart
What elements can aid Venous blood to return to the heart
Resiratory pump - pressure changes caused by respiration compress veins and assist in blood return to the heart
Muscle contraction - muscle contraction causes presses on nearby veins squeezing the blood toward the heart
Venous Valves - Prevent the back flow of blood
Where is bllod pressure measured from
It is a measure of the force (blood pressure) in your arteries
How many lobes does the thyroid have
Two
The secretion of which hormone is stimulated by low blood sugar levels?
Glucagon
Circadian rhythm means that regular fluctuations in hormone levels occurs over a period of how long
A day
T4 is also known as
Thyroxcin
Thyroxcine is secrted by which gland
Thyroid Gland - Thyroid gland is an endocrine gland in your neck whcih makes thyroxin/T4 and Triiodothorynine/T3
Insulin is formed from amino acids True or False
True
What is Thyroid Stimulating Hormone (TSH)
Thyroid stimulating hormone is produced by the pituitary gland. Its role is to regulate the production of hormones by the thyroid gland.
The secretion of which hormone is stimulated by low blood sugar levels?
Glucagon - glucagon is a peptide hormone used to stimulate glucose production in the liver and thereby to maintain adequate plasma glucose concentrations.
Why is the hypothalamus considered to be just as important as the pituitary gland?
________ glands secrete their product through ducts, while _______glands secrete their product into the interstital fluid, which flows into the blood.
Exocrine, Endocrine
which gland is responsible for oxytocin secretion
Posterior Pituitary gland - Your hypothalamus makes oxytocin, but your posterior pituitary gland stores and releases it into your bloodstream.
