BISC 104Lxg Lecture 14: Notes - Gland & Pancreas

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ochrewalrus569

8 Mar 2017

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Four small round masses at the back of the thyroid gland. Stimulates osteoclasts to break down bone, releasing calcium into the blood. Stimulates kidneys to remove calcium from the fluid destined to become urine, returning it to the blood. Stimulates rate at which calcium is absorbed from the gastrointestinal tract. Decreases the level of calcium in the blood. Secreted by adrenal cortex in both males and females. Aldosterone acts on cells of the kidneys to increase reabsorption of sodium ions in to the blood, and to promote the excretion of potassium ions in the urine. Act on the liver to promote the conversion of fat and protein into intermediate substances that are eventually converted to glucose. Levels of circulating melatonin are greater at night than during daylight hours. The pineal gland receives input from the visual pathways. Promotes sleep, reduces jet lag, may slow aging. Too much melatonin can result in seasonal affective disorder (sad)

Related Questions

1. Which, if any, of the following statements is true about theregulation of calcium levels in the blood?

a.) If calcium levels experience a significant drop, PTH levelscan be expected to rise

b.) If calcium levels experience a significant drop, PTH levelscan be expected to drop

c.) If phosphate levels experience even a slight drop, PTHlevels increse dramatically

d.) B and C

2.) An increse in the level of parathyroid hormone would beexpected to have which, if any, of the following effects?

a.) Increased activity of osteoblasts

b.) A decrease in excretion of phosphate by the kidneys

c.) A decrease in the activity of osteoclasts

d.) A and B

3.) Which of the following plays the biggest direct role inincreasing the intestinal absorption of Calcium?

a.) Calcitonin

b.) Calciferol

c.) Calcitriol

d.) Calsequestrin

4.) Our bodies attempt to tightly regulate blood calcium levels.This is an example of:

a.) Homeostasis

b.) Diastasis

c.) Hysteresis

d.) Automonic tone

5.) The _________ secretes a mix of norepinephrine, epinephrine,and dopamine when stimulated by the sympathetic nervous system

a.) Adrenal medulla

b.) Adrenal cortex

c.) Ovarian cortex

d.) Hypothalamus

e.) Pineal gland

6.) Stimulation of beta receptors results in:

a.) Dilation of bronchiole walls via constriction of smoothmuscle cells

b.) Dilation of bronchiole walls via relaxation of smooth musclecells

c.) Faster, stronger heartbeat

d.) A and C

e.) B and C

7.) The diameter of many Stimulation of beta receptors resultsin:

a.) A stronger, faster heartbeat

b.) A weaker, slower heartbeat

c.) No chance in the rate of strength of the heartbate

d.) None of the above

orchidmuskrat125

BISC 104Lxg Lecture 14: Notes - Gland & Pancreas

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