Name the addicting component found in tobacco.
Tobacco contains the addictive substance known as nicotine.
12 Class
What is schizont?
A ring-shaped structure called a schizont emerges from merozoites within human erythrocytes infected by Plasmodium. Subsequently, this schizont generates new merozoites.
What is Rh factor?
The Rh factor is an inherited protein on red blood cells. Presence is Rh-positive (+), absence is Rh-negative (-). Named after its discovery in rhesus monkeys.
Name the causative agent of typhoid fever?
Salmonella typhi.
What does the abbreviation AIDS stand for?
Acquired Immuno Deficiency Syndrome is abbreviated as AIDS.
Which cells stimulate B-cells to form antibodies?
Helper T-cells activate B-cells to produce antibodies.
Name one disease caused by smoking?
Emphysema is a condition characterized by enlarged and damaged lungs, leading to difficulty in breathing.
What is the source of cocaine?
Cocaine originates from the coca plant, scientifically known as Erythroxylum coca.
Describe in brief an account of disorders of the thyroid.
Thyroid gland disorders manifest in three primary types: hypothyroidism, hyperthyroidism, and simple goitre. Hypothyroidism: Hypothyroidism results from a deficient secretion of thyroxine, leading to two distinct disorders: cretinism in children and myxoedema in adults. •Cretinism: Occurs in childhood, characterized by the retardation of physical and mental growth. •Myxoedema: Affects adults, also known as Gull’s disease, resulting in … Read more
Explain action of steroid hormones and proteinous hormones.
Hormones exert their effects by acting on specific target organs or tissues with designated binding sites, known as hormone receptors. The mechanisms vary between steroid hormones and protein hormones. Steroid Hormones: 1. Lipid-soluble steroid hormones easily traverse the lipoproteinaceous plasma membrane. 2. Receptors for steroid hormones are located in the cytoplasm or nucleus. 3. The … Read more