AAP 2 Lab- Endorcrine Glands

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1

The endocrine system is the second major control system of the body. Acting with the _____________, it helps ________ and __________ the activity of the body.

nervous system

coordinate, integrate

2

The nervous system uses electrochemical ________ to bring about rapid control, whereas the more slowly acting endocrine system uses chemical _________, or ____________.

impulses

messengers

hormones

3

The term hormone comes from a Greek word meaning ___________.

to arouse

4

The body’s hormones, which are _______________or ____________ molecules, arouse the body’s tissues and cells by stimulating changes in their _________ activity.

These changes lead to ______________ and to the physiological homeostasis of many body systems.

steroids, amino acid based

metabolic

growth and development

5

Cells within an organ that respond to a particular hormone are referred to as the _______________ of that hormone. The ability of the target to respond depends on the ability of the hormone to bind with specific _______________.

target cells

cellular receptors

6

Although the function of most hormone-producing glands is purely endocrine, the function of others (the ______ and ______) is ______—both ____________.

pancreas, gonads

mixed, endocrine and exocrine

7

The endocrine glands release their hormones directly into the extracellular fluid, from which the hormones enter ___________.

blood or lymph

8

Release Stimulus: Thyrotropin-releasing hormone (TRH)*

Target: Thyroid gland

Effects: Stimulates the secretion of thyroid hormones (T3 and T4)

Anterior Pituitary Gland: Tropic Hormone

Hormone: Thyroid-stimulating hormone (TSH)

9

Release Stimulus: Gonadotropin-releasing hormone (GnRH)*

Target: Ovaries and testes (gonads)

Effects: Females—stimulates ovarian follicle maturation and estrogen production, Males—stimulates sperm production

Anterior Pituitary Gland: Tropic Hormone

Hormone: Follicle-stimulating hormone (FSH)

10

Release Stimulus: Gonadotropin–releasing hormone (GnRH)*

Target: Ovaries and testes (gonads)

Effects: Females—triggers ovulation and stimulates ovarian production of estrogen and progesterone, Males—stimulates testosterone production

Anterior Pituitary: Tropic Hormone

Hormone: Luteinizing hormone (LH)

11

Release Stimulus: Corticotropin-releasing hormone (CRH)*

Target: Adrenal cortex

Effects: Stimulates the release of glucocorticoids and androgens (mineralocorticoids to a lesser extent)

Anterior Pituitary: Tropic Hormone

Hormone: Adrenocorticotropic hormone (ACTH)

12

Release Stimulus: Growth hormone–releasing hormone (GHRH)*

Target: Liver, muscle, bone, and cartilage, mostly

Effects: Stimulates body growth and protein synthesis, mobilizes fat and conserves glucose

Anterior Pituitary: Not Tropic/ Other Hormones

Hormone: Growth hormone (GH)