Tag: parts of the brain

the limbic system is made up of the amygdala, hippocampus, thalamus, hypothalamus, basal ganglia, and cingulate gyrus.  All the components of the limbic system work together to regulate some of the brain's most important processes.

• The limbic system is the portion of the brain that deals with three key functions: emotions, memories, and arousal (or stimulation).
• The components of the limbic system include Amygdala, Hippocampus, Septal nuclei, thalamus, hypothalamus, basal ganglia.
• The posterior surface of the adult midbrain is characterized by four elevations collectively called the corpora quadrigemina. It is not a part of the limbic system.
  
• Hence the brain structure is not considered to be part of the limbic is Corpora quadrigemina.
• So, the correct answer is 'Corpora quadrigemina'.

Larynx lies ventral to the thyroid cartilage. The thyroid cartilage is the largest of the laryngeal cartilages. The thyroid cartilage forms the bulk of the front wall of the larynx. It protects the vocal cords, which are located directly behind it.

Growth hormone is released into the bloodstream from the anterior pituitary gland. Growth hormone release is caused by another hormone (growth hormone-releasing hormone), which is released from the hypothalamus and it causes the pituitary gland to release the growth hormone.

Vasopressin/antidiuretic hormone (ADH) is secreted by posterior pituitary gland and targets nephron tubules to increase water reabsorption and thereby decreasing water content in urine while increasing that of blood. Increased water concentration in blood raises blood volume and blood pressure. It makes the urine concentrated. Thus, the correct answer is option A.

Follicle-stimulating hormone (FSH) is a glycoprotein and gonadotropin secreted by the anterior pituitary in response to gonadotropin-releasing hormone (GnRH) released by the hypothalamus. It helps in the development of follicles in female and triggers Sertoli cells to initiate spermatogenesis in the male.

Abnormal secretion of hormones brings about physical changes in the body. The hyposecretion of  ADH showcases as diabetes insipidus with increased urine output and excessive thirst. Thus, the correct answer is option B.