sex hormone production by testis and ovary
... Sex Hormones and critical (time) periods for sexual differentiation 1. Development of the reproductive tract: Prior to 6 weeks both sexes 6 weeks post ...
... Sex Hormones and critical (time) periods for sexual differentiation 1. Development of the reproductive tract: Prior to 6 weeks both sexes 6 weeks post ...
动物生理学（2009年秋）期末试题
... 12. The collecting duct is able to concentrate urine mainly because: A. it is permeable to NaCl but not water B. it actively transports water C. the osmolarity of the extracellular fluid in the medulla is higher than that in the cortex D. hydrostatic pressure（静水压） forces water out of the duct 13. Du ...
... 12. The collecting duct is able to concentrate urine mainly because: A. it is permeable to NaCl but not water B. it actively transports water C. the osmolarity of the extracellular fluid in the medulla is higher than that in the cortex D. hydrostatic pressure（静水压） forces water out of the duct 13. Du ...
Endocrine System - Westhampton Beach Elementary School
... Endocrine System • Negative Feedback System – hormones work together in opposition; as one increases the other decreases to create a balance • Example: In the diagram ACTH and ...
... Endocrine System • Negative Feedback System – hormones work together in opposition; as one increases the other decreases to create a balance • Example: In the diagram ACTH and ...
Endocrine Notes 2
... The sex hormones are produced by the ovaries and testes. These glands secrete their hormones in response to signals from the pituitary and hypothalamus. Male Reproductive System Testosterone -produced in the interstitial cells of the testes -stimulates spermatogenesis -influences secondary sexual ch ...
... The sex hormones are produced by the ovaries and testes. These glands secrete their hormones in response to signals from the pituitary and hypothalamus. Male Reproductive System Testosterone -produced in the interstitial cells of the testes -stimulates spermatogenesis -influences secondary sexual ch ...
Self Quiz - Endocrine System
... 15. Which of the following would NOT be a possible outcome of elevated TSH secretion? A) increased TRH synthesis B) increased T3/T4 synthesis C) increased body temperature D) decreased blood cholesterol levels E) increased lipolysis ...
... 15. Which of the following would NOT be a possible outcome of elevated TSH secretion? A) increased TRH synthesis B) increased T3/T4 synthesis C) increased body temperature D) decreased blood cholesterol levels E) increased lipolysis ...
bio12_sm_10_2
... stores two hormones produced by the hypothalamus, which are then released into the bloodstream after signals from the hypothalamus. Unlike the anterior pituitary’s hormones, these two hormones, antidiuretic hormone and oxytocin, do not control other hormones, but affect their target tissues directly ...
... stores two hormones produced by the hypothalamus, which are then released into the bloodstream after signals from the hypothalamus. Unlike the anterior pituitary’s hormones, these two hormones, antidiuretic hormone and oxytocin, do not control other hormones, but affect their target tissues directly ...
Hormones
... Cardiac failure can result from too low level of potassium. • Levels of sodium maintain blood pressure and concentration of sodium regulates secretion of aldosterone. • When sodium levels are low, kidneys secrete renin. Renin is an enzyme that leads to the conversion of angiotensinogen to angiotensi ...
... Cardiac failure can result from too low level of potassium. • Levels of sodium maintain blood pressure and concentration of sodium regulates secretion of aldosterone. • When sodium levels are low, kidneys secrete renin. Renin is an enzyme that leads to the conversion of angiotensinogen to angiotensi ...
Endocrine System
... Rickets is a condition caused by a deficiency of vitamin D, especially in infancy and childhood, with disturbance of normal ossification. The disease is marked by bending and distortion of the bones under muscular action, by the formation of nodular enlargements on the ends and sides of the bones, b ...
... Rickets is a condition caused by a deficiency of vitamin D, especially in infancy and childhood, with disturbance of normal ossification. The disease is marked by bending and distortion of the bones under muscular action, by the formation of nodular enlargements on the ends and sides of the bones, b ...
... CRH, which stimulates the anterior pituitary to release ACTH, which in turn stimulates the adrenal cortex to release cortisol. The cortisol acts on a number of effector organs. In addition, the cortisol feeds back on both the anterior pituitary and the hypothalamus. ACTH, adrenocorticotropic hormone ...
The Endocrine System Notes
... Endocrine system: produces and releases chemical messages; slower speed Both systems are integrated and help maintain homeostasis Both systems are regulated by positive and negative feedback mechanisms Negative feedback A change in an internal condition is sensed by the brain The brain cau ...
... Endocrine system: produces and releases chemical messages; slower speed Both systems are integrated and help maintain homeostasis Both systems are regulated by positive and negative feedback mechanisms Negative feedback A change in an internal condition is sensed by the brain The brain cau ...
Endocrine System Notes
... TSH (thyrotropin): Stimulates thyroid gland, making it make more thyroid hormone (TH). Regulated by TRH which comes from hypothalamus via portal circulation. Both TRH release from hypothalamus and TSH release from ant pit are under negative feedback control by TH: more TH suppresses TRH and TSH rele ...
... TSH (thyrotropin): Stimulates thyroid gland, making it make more thyroid hormone (TH). Regulated by TRH which comes from hypothalamus via portal circulation. Both TRH release from hypothalamus and TSH release from ant pit are under negative feedback control by TH: more TH suppresses TRH and TSH rele ...
Endocrine System
... Brain • Hypophyseal portal vessels – Supply anterior pituitary with blood – Route for neurosecretory nerve terminals in hypothalamus to ant. pit. – Route of control of the ant. pit. by the hypothalamus. • Releasing Factors from the hypothalamus travel to the Ant. Pit. by way of these vessels. Th ...
... Brain • Hypophyseal portal vessels – Supply anterior pituitary with blood – Route for neurosecretory nerve terminals in hypothalamus to ant. pit. – Route of control of the ant. pit. by the hypothalamus. • Releasing Factors from the hypothalamus travel to the Ant. Pit. by way of these vessels. Th ...
Answers to Mastering Concepts Questions
... 1. A hormone will only affect certain target cells that have receptors for them. 2. The role of second messengers is to act within the cell to activate the enzymes that produce the hormone’s effects. 3. Peptide hormones usually act faster than steroid hormones because they activate chemical cascades ...
... 1. A hormone will only affect certain target cells that have receptors for them. 2. The role of second messengers is to act within the cell to activate the enzymes that produce the hormone’s effects. 3. Peptide hormones usually act faster than steroid hormones because they activate chemical cascades ...
Anatomy and Physiology Fisher Chapter 11: Endocrine system
... Base of the brain attached to the hypothalamus via a pituitary stalk. 17. How does the hypothalamus control secretions from the posterior and anterior lobes of the pituitary? Nerve impulses from the hypothalamus signal the axon terminals of neurosecretory cells in the posterior pituitary. In the ant ...
... Base of the brain attached to the hypothalamus via a pituitary stalk. 17. How does the hypothalamus control secretions from the posterior and anterior lobes of the pituitary? Nerve impulses from the hypothalamus signal the axon terminals of neurosecretory cells in the posterior pituitary. In the ant ...
1 lecture ES Hyp APG File - Progetto e
... Luteinizing Hormone (LH): Females: responsible for ovulation, formation of corpus luteum in the ovary, and regulation of ovarian secretion of female sex hormones. Males: stimulates cell in the testes to secrete testosterone Prolactin: Females: stimulates breast development and milk production. Males ...
... Luteinizing Hormone (LH): Females: responsible for ovulation, formation of corpus luteum in the ovary, and regulation of ovarian secretion of female sex hormones. Males: stimulates cell in the testes to secrete testosterone Prolactin: Females: stimulates breast development and milk production. Males ...
Invertebrate hormones - Orange Coast College
... Usually found on the posterior of the thyroid gland (2 glands on each lobe, 4 total) The major regulator of blood calcium levels Stimulates osteoclasts to break down bone matrix and release calcium into the ...
... Usually found on the posterior of the thyroid gland (2 glands on each lobe, 4 total) The major regulator of blood calcium levels Stimulates osteoclasts to break down bone matrix and release calcium into the ...
PDF - True-2-me
... plays a key role as the master gland of the endocrine system. It receives information from the brain via the hypothalamus and produces hormones that are important to the functioning of other organs. These hormones are released in the blood circulation in order to reach their target organs. ...
... plays a key role as the master gland of the endocrine system. It receives information from the brain via the hypothalamus and produces hormones that are important to the functioning of other organs. These hormones are released in the blood circulation in order to reach their target organs. ...
The Endocrine System
... The Endocrine System The Endocrine system is made up of glands that release their products into the bloodstream. Their products deliver messages throughout the body. (like broadcasting via radio) Hormones: The “chemicals” released from glands to carry messages They are releases in one part of th ...
... The Endocrine System The Endocrine system is made up of glands that release their products into the bloodstream. Their products deliver messages throughout the body. (like broadcasting via radio) Hormones: The “chemicals” released from glands to carry messages They are releases in one part of th ...
Hypothalamus
The hypothalamus (from Greek ὑπό, ""under"" and θάλαμος, ""room, chamber"") is a portion of the brain that contains a number of small nuclei with a variety of functions. One of the most important functions of the hypothalamus is to link the nervous system to the endocrine system via the pituitary gland (hypophysis).The hypothalamus is located below the thalamus, just above the brainstem and is part of the limbic system. In the terminology of neuroanatomy, it forms the ventral part of the diencephalon. All vertebrate brains contain a hypothalamus. In humans, it is the size of an almond.The hypothalamus is responsible for certain metabolic processes and other activities of the autonomic nervous system. It synthesizes and secretes certain neurohormones, often called releasing hormones or hypothalamic hormones, and these in turn stimulate or inhibit the secretion of pituitary hormones.The hypothalamus controls body temperature, hunger, important aspects of parenting and attachment behaviors, thirst, fatigue, sleep, and circadian rhythms.