Ch. 1-3

Question 1

Place the following componets of the homeostatic control system in the correct order

Answer 1

Receptor, control center, effector, response

Question 2

Most homeostatic control systems in the human body use what type of feedback?

Answer 2

Negative feedback

Question 3

The sum of all chemical reactions in the body is known as?

Answer 3

Metabolism

Question 4

Homeostasis is?

Answer 4

The body’s ability to maintain a stable internal environment

Question 5

What variables need to be maintained within physiological range in our bodies?

Answer 5

Temp, Blood pressure, pH

Question 6

What would a physiologist study?

Answer 6

How kidney makes urine

Question 7

The smallest unit of life is?

Answer 7

cell

Question 8

Which part of a homeostatic control system checks the change in a variable against the set point?

Answer 8

control center

Question 9

What best describes negative feedback?

Answer 9

A system responding to a change
ex. temp rising (fever)

Question 10

The stomach belongs to which organ system?

Answer 10

digestive

Question 11

The 4 major types of organic biological macromolecules found in our bodies are?

Answer 11

proteins, carbohydrates, lipids, nucleic acids

Question 12

All organic molecules contain ? as an essential component?

Answer 12

Carbon

Question 13

The most important inorganic molecule in our bodies is?

Answer 13

water

Question 14

What types of molecules can dissolve in water?

Answer 14

Hydrophilic

Question 15

Which biological macromolecules has the highest energy storage capacity for the body?

Answer 15

triglycerides

Question 16

When salts such as NaCi dissociate, they form what?

Answer 16

electrolytes

Question 17

What type of bonds do water molecules form with other water molecules?

Answer 17

Hydrogen

Question 18

An atom that either loses or gains an electron is called what?

Answer 18

Ion

Question 19

What are building blocks for carbohydrates?

Answer 19

monosaccharides

Question 20

What types of bonds result in partical electrical change in the molecule due to unequal sharing of electrons?

Answer 20

Polar covalent bond

Question 21

What is the final product of mitosis?

Answer 21

2 identical daughter cells with the same number of chromosomes as the parent cell

Question 22

During osmosis, water moves across a water permeable membrane in which direction?

Answer 22

Toward the side with higher solute concentration

Question 23

Regarding membrane transport mechanisms, what is the major difference between passive mechanisms and active mechanisms of transport?

Answer 23

Active mechanisms require cellular energy (ATP), passive mechanisms do not

Question 24

Which organelle is responsible for making proteins?

Answer 24

Ribosome

Question 25

Best describe the plasma membrane

Answer 25

the plasma membrane has a hydrophobic core

Question 26

What occurs during diffusion?

Answer 26

solutes have a net movement from an area of higher concentration to an area of lower concentration

Question 27

The ? is the control center of the cell, and houses DNA?

Answer 27

Nucleus

Question 28

What can pass through the plasma membrane by simple diffusion?

Answer 28

oxygen

Question 29

If a red blood cell is placed in a ? solution it will swell and perhaps burst

Answer 29

hypotonic

Question 30

What is the correct flow of genetic info in the cell, also known as the central digma?

Answer 30

DNA->RNA->Protein