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Male Reproductive System - The gonadotropin releasing hormone

By: HWC, Views: 8482

• Hormonal mechanisms that influence male reproductive function involve endocrine tissues contained in the: • Hypothalamus of the brain. • Anterior pituitary. • Testes. • In the hypothalamus, certain neurosecretory cells secrete gonadotropin- releasing hormone (GnRH). • GnRH ...

Role of the respiratory system - effect of altered ventilation rates

By: HWC, Views: 8271

• The respiratory system regulates blood pH by controlling the amount of carbon dioxide removed from the blood. • Near systemic cells, carbon dioxide forms bicarbonate ions in the blood. H+ ions are also released, thereby decreasing blood pH. • At the alveolar capillaries, bicarbonate io...

Enzyme structure - Properties of enzymes

By: HWC, Views: 7695

■ Enzymes are proteins that catalyze reactions. ■ Some enzymes have two parts: a protein or apoenzyme and a non-protein or cofactor. ■ Cofactor can be a metal ion or another organic molecule called a coenzyme. ■ Coenzymes often come from vitamins. ■ Cofactors affect the shape of...

Neuron Type Animation

By: Administrator, Views: 10721

Interneurons: - Are called central or associative neurons. - Located entirely within the central nervous system. - They function to mediate impulses between sensory and motor neurons.

Fetal Development of the Cardiovascular System

By: Administrator, Views: 10534

How the heart develops in the uterus.

Male Pelvis Animation

By: Administrator, Views: 317

The male pelvis is shaped like a funnel, forming a narrower outlet than the female. The bones are generally thick and heavy and more suited for lifting and running.

Anaphylaxis Animation

By: Administrator, Views: 10505

Anaphylaxis is a serious, life-threatening allergic reaction. The most common anaphylactic reactions are to foods, insect stings, medications and latex. If you are allergic to a substance, your immune system overreacts to this allergen by releasing chemicals that cause allergy symptoms.

Female Pelvis Animation

By: Administrator, Views: 1424

The female pelvis is shaped like a basin; can be oval to round, and is wider than the male pelvis. Designed to accommodate the average fetus during pregnancy and to facilitate its downward passage through the birth canal during childbirth.

Gas exchange - driving force

By: HWC, Views: 7808

• The respiratory system is responsible for the movement of gases involved in cellular metabolism. • Oxygen is used up and carbon dioxide is generated during the aerobic breakdown of glucose and other fuel molecules in order to produce ATP. • Three important continuous physiological pro...