Test 3 Nervous System Flashcards Preview

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Flashcards in Test 3 Nervous System Deck (32):
1

Muscle Spindle (Nerve)

A sensory end organ in a muscle that is sensitive to stretch in the muscle. Including small striated muscle fibers. Covered in connective sheath

2

Meissners Corpuscle (Nerve)

A sensory nerve ending that is sensitive to mechanical stimuli, found in the dermis in various parts of the body

3

Golgi Tendon Organ (Nerve)

A proprioceptive sensory receptor organ that senses changes in muscle tension. Lies at the origin of skeletal muscle fibers

4

Pacinian Corpuscle (Nerve)

Ending of sensory nerve that acts as a receptor for pressure and vibration

5

Naked Nerve Ending

Lacking some natural external covering.

6

Gyrus

A ridge or fold between two clefts on the cerebral surface in the brain.

7

Sulcus

A groove or furrow, especially one on the surface of the brain.

8

Cerebrum and cerebral cortex

The largest part of the human brain, associated with higher brain function such as thought and action. 4 lobes; frontal, parietal, occipital, and temporal lobes

9

Cerebellum

Receives information from the sensory systems, the spinal cord and other parts of the brain. Also regulates motor movements. Also balance, posture, coordination, and speech.

10

Brain Stem parts and their Functions

The medulla, controls breathing, swallowing, blood pressure and heart rate. Pons, links cerebellum to cerebrum. Midbrain, rudimentary vision and hearing.

11

Hypothalamus

Contains small number of nuclei with a variety of functions. Links nervous system to endocrine system via pituitary gland. Dopamine, oxytocin, somatostatin, etc

12

ADH

Also called arginine vasopressin. Constantly regulates and balances the amount of water in our blood. Made by hypothalamus, stored in posterior pituitary gland

13

Oxytocin

A hormone released by the pituitary gland. Causes increased contraction of the uterus during labor and stimulates breast milk

14

Insulin

A hormone produced in the pancreas. Regulates the amount of glucose in the blood. Diabetes is lack of insulin

15

Glucagon

Hormone formed in the pancreas that promotes the break down of glycogen INTO glucose in the liver

16

Thyroid Hormone

The thyroid gland uses iodine from food to make thyroid hormones. The 2 are Triiodothyronine(T3) and Thyroxine(T4)

17

Parathyroid PTH

When blood calcium levels are too low, PTH is released to bring calcium levels back to normal. Balance is crucial for functioning of heart, nervous system and kidneys

18

Calcitonin

Hormone produced in humans by C-cells of the Thyroid gland. Regulates levels of calcium and phosphate in the blood. Opposes parathyroid hormone

19

Estrogen

Steroid hormone that promotes the development and maintenance of female characteristics.

20

Progesterone

Steroid hormone released by the corpus luteum that stimulates the uterus to prepare for pregnancy.

21

Testosterone

A steroid hormone that stimulates the development of male secondary sexual characteristics. Produced mainly in the testes

22

Relaxin

A hormone secreted by the placenta that causes the cervix to dilate and prepares the uterus for the action of oxytocin during labor

23

Melanin

Dark brown to black pigment occurring in hair, skin, and iris of the eye in people and animals. Responsible for tanning of skin

24

Growth Hormone

A hormone that stimulates growth in animal or plant cells. Especially (in animals), hormone secreted by the pituitary gland.

25

Thymosin

One of several polypeptide hormones secreted by the thymus that control the maturation of T-cells. Derived from alpha thymosin.

26

HCG (Human Chronic Gonadotropin)

Hormone produced by the embryo following implantation. Presence of HCG detected in pregnancy tests

27

Prolactin

A hormone released from the anterior pituitary gland that stimulates milk production after child birth

28

LH (Luteinizing Hormone)

Hormone secreted by the anterior lobe of the pituitary gland. In females stimulates ovulation and development tissue in male testes

29

FSH (Follicle-Stimulating Hormone)

Hormone produced by the anterior lobe of the pituitary gland that stimulates the growth of ovaries and activates sperm-forming cells

30

ACTH (AdrenoCorticoTrophic Hormone)

A protein hormone of anterior lobe of the pituitary gland that stimulates the adrenal cortex

31

Sympathetic

The sympathetic nervous system prepares the body for intense physical activity. Referred to as fight-or-flight response

32

Parasympathetic

The parasympathetic nervous system has almost the exact opposite effect and relaxes the body. Slows many high energy functions