Endocrine & Repro Flashcards
(286 cards)
What gland or organ makes up the Endocrine system?
adrenals, pituitary, thyroid, ovaries, testicles, kidneys, pancreas
What is the endocrine system composed of?
Ductless glands that secrete chemical messengers called hormones
_____ are chemical substances produced by cells in one part of the body and transported to another part of body where they influence _____ _____.
Hormones
Cellular activity
T or F
The endocrine system and nervous system make up two major control mechanisms if the body and linked together through the complex integrating action of the hypothalamus
True
The endocrine system and _____system make up the two major control ______ of the body and are linked together through the complex integrating action of the____.
Nervous
Mechanisms
Hypothalamus
Hormones are generally administered to animals for two reasons
1) to correct a dificiency of that hormone
2) to obtain a desired effort
Hormones that are administered to an animal are called—– hormones
Exogenous
Hormones produced naturally in the body are called _____ hormones.
Endogenous
Hormones that are admin to an animal are called _____ hormones whereas those produced naturally in the body are called ______ hormones.
Exogenous
Endogenous
Which gland is called the master gland?
Pituitary
Why is the pituitary gland called the master gland of the endocrine system?
Because of the control it exerts over the regulation of this system.
Pituitary gland is controlled by _____.
Hypothalamus
Where is the pituitary located?
At the base of the brain just ventral to the hypothalamus and is connected to the brain by a stalk.
How is the pituitary gland connected to the brain?
By a stalk
Pituitary is located at the base of the brain just _____ to the hypothalamus.
Ventral
The pituitary is divided into two main lobes:
1) anterior lobe (adenohypophysis)
2) posterior lobe (neurohypophysis)
Where does the anterior lobe arise from?
Embryo logic pharynx
Where does the posterior lobe arise from?
Brain
Anterior lobe or ______ is ______ hormones and _____ acting.
Adenohypophysis
Tropic
Indirect
Posterior lobe or _____ is _____ acting
Neurohypophysis
Direct
How does the hypothalamus exert control over the anterior pituitary?
Through the transport of releasing hormones, or factors, down the hypophyseal portal system.
In the anterior pituitary the factors release causes the secretion of ____ hormones into the circulation
Tropic
Tropic hormones produced by the anterior pituitary:
Thyroid stimulating hormone (TSH) Adrenocorticotropic hormone (ACTH) Luteinizing hormone (LH) Follicle stimulating hormone (FSH) Prolactin (LTH) and Growth hormone (GH or somatotropin )
The tropic hormones are sometimes called _____ acting hormones
Indirect