Biology Quiz 7

The primary function of sweat glands is to keep the core body temperature at approximately 37°C by releasing sweat in a hot environment or during physical activity. As the water in the sweat evaporates, the surface of the skin cools.

Leaves are green due to the presence of a green-coloured pigment, called chlorophyll. Chlorophyll is important because it helps plants make energy from sunlight—a process called photosynthesis.

Saliva contains a special enzyme called amylase that helps digest the starches in food. Amylase breaks down starches (complex carbohydrates) into sugars, which the body can more easily absorb. Saliva also contains an enzyme called lingual lipase, which breaks down fats.

The immunity caused by the B-lymphocytes is called Humoral Immunity. Humoral immunity is the process of adaptive immunity manifested by the production of antibodies by B-lymphocytes. It develops in bone marrow.

Cytology is the study of cells as fundamental units of living things. A cytology test is used to look closely at cells and body fluids.

The concentration of hemoglobin in blood is decreased in anemia. Hemoglobin is a protein in red blood cells that carries oxygen to the body's organs and tissues and transports carbon dioxide from your organs and tissues back to your lungs. If a hemoglobin level is lower than normal, it means a low red blood cell count (anemia).

Black Death was a devastating global epidemic of bubonic plague that struck Europe and Asia in the mid-1300s.

The human skeleton of an adult consists of around 206 bones. There are typically around 270 bones in human infants, which fuse to become 206 to 213 bones in the human adult.

Myxine is a species of hagfish. It has a jawless, lipless mouth that is star-shaped when closed. At the tip of the snout it has a single nasal aperture.

The fluid part of blood without corpuscles is called Plasma. Blood plasma is fluid part of blood in which corpuscles (blood cells) are absent, but contains proteins and other constituents of whole blood in suspension. Plasma is the largest part (about 55%) of blood.