A&P II Test 1

Question 1

Characteristics of Life

Answer 1

Irritibility (responsiveness): Ability of an organism to sense changes inside & outside of our body. Digestion, respiration, circulation, movement, growth, reproduction, absorption, assimilation, and excretion are also characteristics.

Question 2

Metabolism

Answer 2

All the chemical reactions that occur within cells that result in either the use or storage of energy.

Question 3

Needs of an organism

Answer 3

Oxygen, food, water, heat, & pressure (atmospheric).
Seal Level (SL)- 760mmHg
Oxygen 21%
Nitrogen 78%
Others 1%
Partial pressure: 760 x .21 = 159.60mmHg

Question 4

Homestasis

Answer 4

Stable internal environment in the body

Question 5

Negative feedback

Answer 5

Anything that is too high or too low which causes our body to make changes.

Question 6

Heat Stress

Answer 6

Too long in sun- hot environment

Question 7

Heat exhaustion

Answer 7

Fatigue, low fever

Question 8

Heat stroke

Answer 8

Life threatning, increase body tempature, not sweating.

Question 9

Pyhsiolgical response for heat related disorders

Answer 9

Sweating, & vasodilation. Negative feedback triggers the physilogical response.

Question 10

Hypoxia

Answer 10

Low blood oxygen

Question 11

Hypothermia physilogical response

Answer 11

Vasoconstriction- bloods stays internal to keep the organs going.
Shivering-muscles shake causing heat.

Question 12

Levels of organization

Answer 12

Atoms-smallest units
molecules
macromolecules
cells
tissues
organs
organ system
organism

Question 13

Nucleus contains:

Answer 13

Protons- + charge
Neutrons: neutral charge
Elections: - charge

Question 14

Atomic number

Answer 14

Is the number of protons found in an atom.

Question 15

Atomic weight

Answer 15

The number of protons + the number of neutrons in an atom.

Question 16

Isotopes

Answer 16

Two atoms of the same element with different atomic weights. Ex. (Iodine): slightly radiotech.

Question 17

Element

Answer 17

A substance that cant change under ordianary labatory conditions.

Question 18

Molecules

Answer 18

Two or more atoms bonded together.

Question 19

Compounds

Answer 19

Two or more atoms with two or more atoms put together.

Question 20

Structual formula

Answer 20

H H

0

Question 21

Chemical formula

Answer 21

H2O

Question 22

3 types of bonds

Answer 22

Covalent: sharging of electrons
Ionic: Holding atoms by charges
Hydrogen: Between base pairs of DNA and between water molecules.