5 Written questions
5 Matching questions
- Positive Feedback
- Negative Feedback
- a Another way to maintain homeostasis is a positive feedback loop. In this process, release of an initial hormone stimulates release or production of other hormones or substances which stimulate further release of the initial hormone.
- b This hormone is secreted by the pineal gland and probably helps regulate sleep patterns.
- c A group of sex hormones secreted by the testes.
- d Substances that are released by cells that act to regulate the activity of other cells in the body.
- e One way to maintain homeostasis inside an organism or cell, is a negative feedback loop. In this process the final step in a series of events inhibits the initial signal in the series.
5 Multiple choice questions
- Specific cells that hormones travel to, to produce a specific effect.
- The adolescent stage during which the sex organs mature and secondary sex characteristics, such as facial hair appear. In males, during this stage, sperm production begins, the voice deepens, the chest broadens, and hair begins to grow on the body and face. In females, the menstrual cycle begins, the breasts grow, and the hips wide.
- These amino acid-based hormones produced in the adrenal medulla are also known as adrenaline and noradrenaline. These hormones work together to orchestrate the nervous system's reaction to stress and its "fight-or-flight" reaction response to danger. When a person is stressed the medulla secretes both hormones into the bloodstream. They increase heart rate, blood pressure, blood glucose level, and blood flow to the heart and lungs. They also stimulate enlargement of the bronchial tubes and dilation of the pupils.
- A hormone secreted by the anterior pituitary stimulates secretion of sex hormones from the gonads. It stimulates the secretion of estrogen and progesterone in females.
- One of these is located over each kidney and each has an inner core, the medulla and the outer layer, the cortex. The medulla and cortex function as separate endocrine glands. Secretion of hormones in the medulla is controlled by the nervous system while hormones in the anterior pituitary regulate secretion of hormones in the cortex. The cortex responds specifically to adrenocorticotropic hormone (ACTH), which is secreted by the anterior pituitary gland.
5 True/False questions
Amino Acid-Based Hormones → Many hormones work together in pairs to regulate the level of critical substances. These hormones have opposite effects.
Gonads → The ovaries in females, and the testes in males. These are gamete-producing organs that also produce a group of steroid sex hormones. Sex hormones regulate body changes that begin at puberty.
Receptors → Proteins that bind to specific signal molecules that cause the cell to respond.
Diabetes Mellitus → Endocrine cells within the walls of some digestive organs also secrete a variety of hormones that control digestive processes. Some examples of these hormones include gastrin and secretin.
Pineal Gland → This gland is located near the base of the brain and it secretes melatonin.